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                                 12/6/2020
                                 ---------

[bash-5.1 released]

                                   12/7
                                   ----
Makefile.in
        - bashline.o: add dependency on ${DEFDIR}/builtext.h. Report from
          Fazal Majid <fazal@majid.org>

                                   12/11
                                   -----
builtins/wait.def
        - wait_builtin: don't assign the variable given with -p if there are no
          jobs to wait for. Report and fix from OÄuz <oguzismailuysal@gmail.com>

arrayfunc.c
        - kvpair_assignment_p: return non-zero if argument L appears to be a
          key-value pair associative array compound assignment
        - expand_and_quote_kvpair_word: run a single word in a key-value pair
          associative array compound assignment through the appropriate
          expansions and single-quote the result

arrayfunc.h
        - kvpair_assignment_p, expand_and_quote_kvpair_word: extern declarations

subst.c
        - expand_oneword: detect whether VALUE appears to be a key-value
          pair compound assignment and call the appropriate function to expand
          each word in the resulting list. Fixes inconsistency reported by
          oguzismailuysal@gmail.com

                                   12/12
                                   -----
subst.c
        - command_substitute: don't reset pipeline_pgrp to shell_pgrp if we
          are already forked to run a command (SUBSHELL_FORK). Fixes SIGINT
          in command substitution in here-document in forked child issue
          reported by oguzismailuysal@gmail.com

                                   12/18
                                   -----
execute_cmd.c
        - execute_pipeline: execute the lastpipe code even if prev == 0. It
          can only be 0 here if stdin was closed when this function was
          executed
        - execute_pipeline: if prev == 0, set lstdin to a sentinel (-1) that
          means to close fd 0 after executing the command, and call close(prev)
          before restoring stdin. restore_stdin now understands -1, and closes
          fd 0. Fixes issue reported by Tomas Janousek <tomi@nomi.cz>

                                   12/21
                                   -----
doc/bashref.texi
        - PROMPT_COMMANDS: clean up a couple of remaining instances of this
          name. Report from Eli Schwartz <eschwartz@archlinux.org>

                                   12/26
                                   -----
subst.c
        - command_substitute: make sure that the child process always has
          pipeline_pgrp == shell_pgrp: if pipeline_pgrp is non-zero when we
          get to the child, meaning that we're part of an already-forked
          child that is, for instance, running redirections, we need to reset
          shell_pgrp to it to preserve the invariant. Fixes bug with terminal
          being set to the incorrect pgrp reported by oguzismailuysal@gmail.com

                                   12/29
                                   -----
configure.ac,builtins/shobj-conf,m4/threadlib.m4
        - midnightbsd: update auto-configuration to treat MidnightBSD like
          FreeBSD. From https://savannah.gnu.org/patch/?10006

                                   12/30
                                   -----
examples/loadables/stat.c
        - stattime: use strftime with a default format or the format supplied
          with the -F option to format the file time information
        - stat_builtin: now takes a -F fmt option for a strftime format string;
          change to function calling sequences to pass the format down to
          stattime

examples/loadables/Makefile.in
        - stat: now built and installed by default

                                   12/31
                                   -----
command.h
        - SUBSHELL_IGNTRAP: new flag value

jobs.c
        - make_child: set SUBSHELL_IGNTRAP in subshell_environment in the
          child process, meaning that we should not execute trap handlers for
          trapped signals

execute_cmd.c
        - execute_in_subshell, execute_simple_command, execute_disk_command:
          make sure to unset SUBSHELL_IGNTRAP after a child process restores
          the original signal dispositions
        - execute_simple_command: make sure to set SUBSHELL_IGNTRAP after
          make_child returns and we're setting subshell_environment directly

subst.c
        - command_substitute,process_substitute: unset SUBSHELL_IGNTRAP after
          the child process has reset the trapped signal dispositions

trap.c
        - trap_handler: if we get a signal for which we have set a trap, but
          SUBSHELL_IGNTRAP is set in subshell_environmnent, make sure we
          restore the original signal disposition and resend the signal to
          ourselves. Fixes issue reported by Nikolay Borisov <nborisov@suse.com>
          (or at least makes the race window much smaller)

sig.c
        - initialize_terminating_signal: set the original signal handler from
          the return value from sigaction; a minor optimization that saves a
          system call or two

                                 1/5/2021
                                 --------
builtins/declare.def
        - declare_internal: make some option combinations that don't make
          sense errors (e.g., -f and -a/-A/-i/-n)
        - declare_internal: if we build a new variable name by expanding the
          value of a nameref variable, make sure to chop the `+' in a `+='
          off before going on

                                    1/7
                                    ---
doc/{bash.1,bashref.texi}
        - bind: add an example to the synopsis making it clear that you can
          use any readline command line as a non-option argument, as it says
          in the text. From a report from Dan Jacobson <jidanni@jidanni.org>

                                   1/12
                                   ----
locale.c
        - local_shiftstates -> locale_shiftsates in the non-multibyte code
          branch. Reported by Henry Bent <henry.r.bent@gmail.com>

subst.c
        - expand_compound_assignment_word: make sure to call dispose_words on
          the WORD_LIST * returned from expand_oneword after turning it back
          into a string. Fixes memory leak reported by Alexander Mescheryakov
          <alexander.s.m@gmail.com>

                                   1/13
                                   ----
variables.c
        - bind_variable_internal: when performing an assignment to a subscripted
          array variable that was the value of a nameref (used in the original
          assignment), don't call make_variable_value on the value, since that
          messes up +=. Just call assign_array_element and let that take care
          of calling make_variable_value appropriately. Fixes bug reported by
          Oguz <oguzismailuysal@gmail.com>

                                   1/14
                                   ----
findcmd.c
        - search_for_command: if `checkhash' is set, don't add non-executable
          files to the command hash table, since we will just remove them
          later

lib/sh/winsize.c
        - get_new_window_size: set *rp and *cp even if READLINE is not defined

                                   1/15
                                   ----
lib/sh/winsize.c
        - get_new_window_size: call rl_set_window_size only if we can determine
          we're using readline: an interactive shell without no-line-editing,
          or if we've already initialized readline, presumably in a non-
          interactive shell 

support/Makefile.in
        - man2html: add LDFLAGS_FOR_BUILD to the recipe. Report from
          Jeffrey Walton <noloader@gmail.com>

                                   1/17
                                   ----
lib/readline/misc.c
        - rl_operate_and_get_next: fix old K&R function declaration. Report
          from Tom Tromey <tom@tromey.com>

lib/readline/readline.c
        - _rl_internal_char_cleanup: move code that cleans up the active region
          and deactivates the mark inside this function so callback mode
          applications get the intended functionality. Report and fix from
          sparrowhawk996@gmail.com

lib/readline/bind.c
        - rl_parse_and_bind: when using the arithmetic comparison operators on
          the version, make sure to invert the tests so that we stop parsing
          if the test fails. Report and fix from Tom Tromey <tom@tromey.com>

                                   1/19
                                   ----
Makefile.in
        - pipesize.h: add dependency on ${BUILTINS_LIBRARY} to avoid parallel
          makes trying to create it twice. Report and fix from
          Richard Purdie <richard.purdie@linuxfoundation.org>

                                   1/21
                                   ----
subst.c
        - param_expand: if a nameref expands to array[@] or array[*], make sure
          to call chk_atstar so the right variables are set to split the
          result. Report from Oguz <oguzismailuysal@gmail.com>

                                   1/22
                                   ----
builtins/declare.def
        - Rewrote to reduce complexity. Still needs some work.

lib/readline/*.h, lib/tilde/tilde.h
        - PARAMS: remove, rely on compilers understanding function prototypes

lib/readline/{undo.c,histlib.h}
         - _hs_replace_history_data: move extern declaration to histlib.h

lib/readline/readline.c
        - _rl_parse_colors: instead of an extern declaration for this, include
          "parse-colors.h" for it

lib/readline/{histfile.c,histlib.h}
        - _hs_append_history_line: move extern declaration to histlib.h

lib/readline/history.h
        - HS_HISTORY_VERSION: define to 0x0801 (current library version) if
          it's not already defined. We conditionally define it in case an
          application has (unwisely) chosen to use it, since the history
          library doesn't do anything with it yet

lib/readine/{rlprivate.h,{search,misc,readline}.c}
        - _rl_free_history_entry: add extern declaration to rlprivate.h, remove
          extern declaration from c source files. Use HS_HISTORY_VERSION as a
          sentinel that it's ok to use HIST_ENTRY in rlprivate.h

lib/readline/{rlprivate.h,{isearch,search,undo}.c}
        - _rl_saved_line_for_history: add extern declaration to rlprivate.h,
          remove extern declaration from c source files, using HS_HISTORY_VERSION
          in the same way

                                   1/24
                                   ----
lib/readline/signals.c
        - _rl_handle_signal: make sure that all sigprocmask calls are protected
          by HAVE_POSIX_SIGNALS. Report and fix from Tom Tromey <tom@tromey.com>

                                   1/26
                                   ----
lib/readline/callback.c
        - rl_callback_read_char: make sure rl_linefunc is non-NULL before
          calling through the pointer. The line function could have been
          removed by the application before readline processes any typeahead
          input. Bug reported by Matthias Klose <doko@debian.org>, pointer
          to root cause from Koichi Murase <myoga.murase@gmail.com>

lib/glob/glob.c
        - skipname,wskipname: put in some additional checks for `.' to ensure
          that we don't get false positives (or incomplete tests) that can 
          affect the results of extglob patterns. Reported by
          gregrwm <rhn-users@greatlakedata.com>

                                   1/27
                                   ----
lib/glob/glob.c
        - extglob_skipname,wextglob_skipname: fixed an off-by-one error (SE
          was being set to one character before the end of the pattern string,
          not the null character at the end of the pattern string like other
          callers of glob_patscan) that caused the last character of the last
          subpattern to be cut off when calling skipname
        - extglob_skipname,wextglob_skipname: some cleanups so the code is
          closer to identical for the single-byte and wide character versions

                                    2/1
                                    ---
execute_cmd.c
        - execute_simple_command: in posix mode, if we have a variable
          assignment error while assigning into the temporary environment (e.g.,
          assigning to a readonly variable), a non-interactive shell running a
          special builtin exits; a non-interactive shell running anything else
          jumps back to the top level. A shell compiled with -DSTRICT_POSIX
          exits unconditionally.
        - execute_simple_command: make sure posix mode sets $? to non-zero
          if a variable assignment error occurs preceding a non-special builtin

subst.c
        - do_assignment_statements: take the code from expand_word_list_internal
          that performs assignment statements, either standalone or preceding 
          simple command names, and factor it out into this function
        - expand_word_list_internal: call do_assignment_statements where
          appropriate

                                    2/2
                                    ---
lib/glob/glob.c
        - dequote_pathname: fix function definition for non-multibyte systems.
          Report and fix from Marc Aurèle La France <tsi@tuyoix.net>

Makefile.in,doc/Makefile.in
        - for certain targets, remove files before creating them to deal with
          symlinked build trees.
          Report and fix from Marc Aurèle La France <tsi@tuyoix.net>

examples/loadables/accept.c
        - include limits.h before typemax.h
          Report and fix from Marc Aurèle La France <tsi@tuyoix.net>

builtins/gen-helpfiles.c
        - if USING_BASH_MALLOC is defined, make sure to undefine malloc as well
          as free. Fixes bug reported by George R Goffe <grgoffe@yahoo.com>

builtins/Makefile.in
        - install-help: now depends on $(HELPFILES_TARGET) so we make sure the
          separate helpfiles are created before we try to install them if we
          don't go through the `all' makefile target

configure.ac
        - HELPDIR: now ${datadir}/bash/helpfiles

                                    2/3
                                    ---
parse.y
        - parse_string_to_word_list: before expanding a compound assignment
          statement body, make sure to save any alias that's currently being
          expanded. Restore the alias after the compound assignment is parsed.
          Reported back in 11/2020 by Alex fxmbsw7 Ratchev <fxmbsw7@gmail.com>

                                    2/4
                                    ---
lib/readline/histexpand.c
        - history_expand_internal: when calling the history_inhibit_expansion
          function, make sure to call it using the string as we've expanded it
          to that point (RESULT), adding the expansion and next characters
          temporarily, since we make expansion decisions based on what we've
          accumulated, not what we started with. This makes things like
          echo abc!$!$ work, where before the second `!' inhibited expansion
          because bash_history_inhibit_expansion mistakenly took it as the
          second character in a `$!' word expansion. Fixes bug reported back
          in 10/2020 by Paul Fox <paul.d.fox@gmail.com>

array.h
        - array_pop: instead of calling array_dispose_element from this macro,
          just call array_shift with the AS_DISPOSE flag

                                    2/5
                                    ---
bashhist.c
        - shell_comment: move condition to return 0 if the delimiter stack is
          not empty or the shell is parsing a here document into the function
          itself, don't have the callers check so the check is in one place.
          Fixes bug reported by Oguz <oguzismailuysal@gmail.com>

array.h,variables.c
        - ARRAY_ELEMENT_REPLACE: convenience define for modifying an array
          element's value

variables.c
        - pop_args: a couple of code simplifications

                                    2/7
                                    ---
lib/malloc/malloc.c
        - pagesz: at least MALLOC_PAGESIZE_MIN (4096) bytes
        - union mhead: now 16-byte aligned on all systems, 32-bit and 64-bit
          pointers
        - binsizes: since the smallest allocation overhead is now 16 bytes,
          redo the buckets so binsizes[0] == 32; adjust the thresholds for
          split/coalesce/prepopulate/mmap (NBUCKETS = 28; STARTBUCK = 0).
          Sizes stay pretty much the same; indices change
        - consistently use MALLOC_SIZE_T instead of long/unsigned int/int
        - use MAGIC8_NUMBYTES as the length of the mh_magic8 buffer, in case
          it changes later for alignment
        - internal_remap: new function, calls mremap to reallocate a chunk of
          memory allocated using mmap(); called from internal_realloc if the
          old size and new size are both bigger than the mmap threshold
        - internal_realloc: call internal_remap if the old size and new size
          are both above the threshold where we use mmap for allocation

                                   2/10
                                   ----
include/timer.h
        - new file, declaration for a timer struct to be used by a set of
          functions to implement timers using SIGALRM or select/pselect

lib/sh/timers.c
        - new file, set of functions to manipulate timer objects and timeouts
          using SIGALRM or select/pselect. Inspired by a patch from
          Koichi Murase <myoga.murase@gmail.com>. Not used yet

                                   2/11
                                   ----
builtins/read.def
        - read_builtin: if there is a timeout set, block SIGCHLD around calls
          to zread and its siblings, or calls to readline for `read -e', so
          SIGCHLD (and the consequent waitpid) doesn't interrupt the read.
          Fixes bug reported by Koichi Murase <myoga.murase@gmail.com>, but
          there may be a different fix coming

Makefile.in,builtins/Makefile.in
        - fix up dependencies, especially on builtins.h and builtext.h


                                   2/12
                                   ----
lib/readline/input.c
        - rl_read_key: if we set rl_done == 1, set RL_STATE_DONE as well
          Reported by Koichi Murase <myoga.murase@gmail.com>

lib/readline/isearch.c
        - _rl_search_getchar: only call _rl_read_mbstring if rl_read_key returns
          >= 0, avoid some work

lib/readline/vi_mode.c
        - _rl_vi_callback_change_char,_rl_vi_change_char: don't overwrite the
          last replacement string if _rl_vi_callback_getchar returns -1.
          It will likely make no difference, since the next read will return
          an error or EOF, but being careful
        - rl_vi_overstrike: if _rl_overwrite_char doesn't return 0, break out
          of the loop

lib/readline/text.c
        - _rl_overwrite_char: return 1 if _rl_read_mbstring returns < 0 so
          we don't try to insert garbage

bashline.c
        - posix_edit_macros: handle rl_read_key() returning <= 0

                                   2/15
                                   ----
parse.y
        - read_comsub: make sure to turn on the LEX_RESWDOK flag if we are in
          a case statement and read a `)', since we can get a valid `esac'.
          Fixes bug reported by Oguz <oguzismailuysal@gmail.com>
        - read_comsub: if we're in a case statement, recognize `}' as a
          reserved word and set the LEX_RESWDOK flag for the next word, since
          we can get an esac (or another reserved word) after it

                                   2/16
                                   ----
parse.y
        - reserved_word_acceptable: add ARITH_CMD and COND_END to the list of
          tokens that can precede a reserved word, so you can use reserved
          words after ((...)) and [[...]].
          Reported by Koichi Murase <myoga.murase@gmail.com>

                                   2/17
                                   ----
parse.y
        - parse_comsub: use new LEX_CASEWD flag to track when we are reading
          the WORD in `case WORD in' and turn on the LEX_RESWDOK flag when
          that word ends. This allows $(case x in esac), which no one uses.
        - parse_comsub: use LEX_PATLIST flag to track when we are reading a
          case pattern list so `|' doesn't turn on the LES_RESWDOK flag
        - parse_comsub: case_level: simple counter to count the number of esacs
          we need to see before we're no longer in a case statement; analog of
          esacs_needed_count from the lexer

                                   2/19
                                   ----
parse.y
        - CHECK_FOR_RESERVED_WORD: don't return ESAC if we read `esac' after a
          left paren in a case pattern list. From an austingroup-bugs discussion
          about https://www.austingroupbugs.net/view.php?id=1454
        - parse_comsub: if we read a `(' while looking for a case pattern list
          and LEX_CKESAC is set, we have a leading left paren in the pattern
          list and should turn off LEX_CKESAC so (esac) doesn't prematurely
          terminate the case command. From an austingroup-bugs discussion
          about https://www.austingroupbugs.net/view.php?id=1454

                                   2/26
                                   ----
builtins/history.def
        - history_builtin: when checking negative offsets to -d, which are
          supposed to count back from the end of the history list, check the
          range against 0 instead of history_base, because the calculation is
          done against history_length, which is independent of history_base.
          Report and fix from Christopher Gurnee <chris@gurneeconsulting.net>

                                   2/28
                                   ----
doc/bashref.texi
        - replaced a number of uses of @var with a mixture of @env and @dfn
          to better match up with the texinfo standards

doc/{bash.1,bashref.texi}
        - clarify some aspects of the coproc description, especially the
          use of NAME and when it's optional

                                    3/1
                                    ---
subst.c
        - read_comsub: fix off-by-one error in mbrtowc that causes a read one
          character past the end of buf. Report and fix from
          Platon Pronko <platon7pronko@gmail.com> in
          https://savannah.gnu.org/patch/?10035

                                    3/3
                                    ---
builtins/ulimit.def
        - ulimit_builtin: Posix compatibility: if the last command specified
          by an option does not have an option argument, but there is an
          operand remaining after all the options are parsed, treat the
          operand as an argument to that last command. From an austin-group
          discussion and a Geoff Clare suggestion back in November, 2020.
          Austin Group interpretation 1418

examples/shellmath
        - a package of shell functions to perform floating-point math entirely
          in bash. Contributed by Michael Wood <mawood20@gmail.com>. Available
          at https://github.com/clarity20/shellmath

                                    3/4
                                    ---
support/shobj-conf
        - darwin: take out the -arch-only option in SHOBJ_XLDFLAGS and
          SHOBJ_ARCHFLAGS; no longer needed

doc/{bash.1,bashref.texi}
        - coprocesses: suggested changes from rms@gnu.org; recommend the
          `coproc NAME { commands; }' form as the simplest and most flexible

                                    3/5
                                    ---
builtins/exec.def
        - exec_builtin: set last_command_exit_value before calling exit_shell
          so any exit trap gets the right value for $?. From Matthew Bauer
          <mjbauer95@gmail.com> via https://savannah.gnu.org/patch/?10039

                                    3/8
                                    ---
include/timer.h
        - SHTIMER_ALRMSET: new flag, indicates that there is an active alarm
          associated with this timer (falarm() was called)

lib/sh/timers.c
        - shtimer_set: set the SHTIMER_ALRMSET flag after calling falarm
        - shtimer_unset: don't call falarm(0,0) unless the SHTIMER_ALRMSET flag
          is set

                                    3/9
                                    ---
include/posixtime.h
        - added some BSD convenience defines if they are not present

parse.y,shell.h
        - {save,restore}_parser_state: save and restore shell_eof_token and
          pushed_string_list; change callers (e.g., xparse_dolparen) so they
          don't have to manage them

                                   3/10
                                   ----
builtins/common.h
        - extern declarations for moving to timers (sh_timer) for read builtin
          timeouts

quit.h
        - CHECK_ALRM: remove, no longer used

trap.c
        - check_signals: call check_read_timeout instead of CHECK_ALRM

bashline.c
        - bash_event_hook: use read_timeout instead of checking `sigalrm_seen';
          that no longer exists
        - bash_event_hook: accommodate readline timing out (not used yet)

lib/sh/zread.c
        - zread: call read_builtin_timeout() to check for a timeout before
          calling a blocking read()
          
builtins/read.def
        - sigalrm,reset_timeout,check_read_timeout,read_builtin_timeout: new
          and modified functions to use sh_timers for timeouts instead of
          SIGALRM. Based on work contributed by Koichi Murase
          <myoga.murase@gmail.com>
        - read_builtin: use sh_timers for read timeouts (-t N) instead of
          using SIGALRM
        - edit_line: simulate receiving SIGALRM if readline times out (not
          used yet)

                                   3/11
                                   ----
lib/readline/readline.c
        - rl_initialize: call _rl_timeout_init to set things up for any timeout 
          that was set with rl_set_timeout
        - readline_internal_charloop: if we longjmped because of a timeout,
          make sure to set rl_done/RL_STATE_DONE and return; we are
          abandoning this call to readline(). The readline timeout changes
          were based on work contributed by Koichi Murase
          <myoga.murase@gmail.com>

lib/readline/readline.h
        - extern declarations for new timeout functions and hook
        - rl_clear_timeout: new define

lib/readline/callback.c
        - rl_callback_read_char: if we longjmped because of a timeout,
          make sure to set rl_done/RL_STATE_DONE and return; we are
          abandoning this call to readline()

lib/readline/util.c
        - _rl_abort_internal: if we time out, don't ring the bell; let the
          caller handle it

lib/readline/input.c
        - extern declarations for public and readline-library-private functions
          and hooks to implement timeouts
        - rl_set_timeout,rl_timeout_remaining: new public functions
        - _rl_timeout_select: new function, uses select/pselect to implement
          read timeouts that take timeouts set with rl_set_timeout into account;
          calling hook function if a timeout occurs
        - rl_gather_tyi, _rl_input_available: use _rl_timeout_select, taking
          any existing timeout into consideration if it expires before the
          timeout passed as an argument
        - rl_getc: use _rl_timeout_select and handle any timeouts by calling
          _rl_timehout_handle
        - set_alarm,reset_alarm: new functions to implement timeouts using
          SIGALRM for systems that lack a working select/pselect
        - _rl_timeout_init: new function, sets things up for reading input
          with a specified timeout
        - _rl_timeout_handle: a timeout handler; calls any event hook and
          sets up to abort the current readline() call
        - _rl_timeout_handle_sigalrm: a timeout handler for systems using
          SIGALRM to implement timeouts

lib/readline/parens.c
        - rl_insert_close: use _rl_timeout_select to take timeouts into account

lib/readline/rlprivate.h
        - extern declarations for readline-library-private timeout functions

lib/readline/rltty.c
        - rl_deprep_terminal: don't print a newline after the bracketed paste
          disable sequence if we timed out

lib/readline/signals.c
        - _rl_handle_signal: if sig is SIGALRM, call _rl_timeout_handle_sigalrm()

lib/readline/doc/rltech.texi
        - rl_set_timeout,rl_timeout_remaining: document new public functions
        - RL_STATE_TIMEOUT: document new possible state value for rl_readline_state
        - rl_timeout_event_hook: document new hook function, called when
          readline times out

builtins/read.def
        - read_builtin: changes to use the readline timeout functions to
          implement timeouts with `read -e'; these use rl_set_timeout and
          sh_timer structs together

                                   3/12
                                   ----
subst.c
        - expand_string_dollar_quote: new function, expands $'...' and $"..."
          in a string for those code paths that don't expand it themselves

subst.h
        - expand_string_dollar_quote: extern declaration

parse.y
        - read_secondary_line: if $'...' or $"..." appears in the line, call
          expand_string_dollar_quote to expand them. This now returns new
          memory, need to change callers

make_cmd.c
        - make_here_document: account for read_secondary_line returning newly
          allocated memory, free `full_line' appropriately

bashline.c
        - shell_expand_line,history_and_alias_expand_line: expand $'...' and
          $"..." in the line by calling expand_string_dollar_quote, since
          that happens after history expansion and before alias expansion in
          normal processing 

                                   3/15
                                   ----
subst.c
        - expand_string_dollar_quote: fix out-of-order initialization

Makefile.in
        - {TAGS,tags}: add ETAGS/ETAGSFLAGS/CTAGS/CTAGS flags; make sure to
          cd to the source directory before running them to get source files
          that don't have absolute paths. Fix from Mike Jonkmans
          <bashbug@jonkmans.nl>

parse.y
        - xparse_dolparen: don't longjmp if FLAGS includes SX_NOLONGJMP. From
          a report by Xu Lu <oliver_lew@outlook.com>

                                   3/16
                                   ----
subst.c
        - process_substitute: set startup_state and parse_and_execute_level
          to see if we can avoid a fork()

bashline.c
        - bash_spell_correct_word: bindable command (spell-correct-word) to
          perform spelling correction on the current `shellword', using the
          same code as the `cdspell' option and directory spelling correction
          during completion. Feature suggested by in 10/2020 by
          Karl Kleinpaste <karl@kleinpaste.org>
        - bash_spell_correct_word: bound to "C-x s" by default in emacs mode

lib/readline/display.c
        - rl_redisplay: fix redisplay problem that occurs when switching from
          the rl-digit-argument prompt "(arg: N)" back to the regular prompt,
          and the regular prompt contains invisible characters

doc/bash.1,lib/readline/doc/rluser.texi
        - spell-correct-word: document new function and its default binding

                                   3/17
                                   ----
doc/{bash.1,bashref.texi}
        - cd: slight changes to specify that it sets PWD and OLDPWD
        - {pushd,popd}: make it clear that these builtins use cd to change
          the current working directory; change wording to simplify the
          description and clarify the exit status

                                   3/18
                                   ----
execute_cmd.c
        - execute_disk_command: after performing redirections, call
          unlink_all_fifos() to remove the FIFOs created as part of
          expanding redirections. They should have been opened by then, and
          we're going to call shell_execve right away anyway, so we won't be
          around to remove the FIFOs. From a report from
          Michael Felt <aixtools@gmail.com>

                                   3/22
                                   ----
parse.y
        - alias_expand_token: slight tweak to check for alias expansion: perform
          expansion unconditionally if PST_ALEXPNEXT is set, and disable it
          in case statement pattern lists if the previous token indicates a
          command name is acceptable.
          From a report by Oguz <oguzismailuysal@gmail.com>

config-bot.h
        - HAVE_MKDTEMP: fix typo

                                   3/25
                                   ----
lib/readline/terminal.c
        - look in terminfo for key sequences for page up (kP) and page down
          (kN) and bind them to history-search-{backward,forward},
          respectively. From a patch from Xose Vazquez Perez
          <xose.vazquez@gmail.com>

                                   3/30
                                   ----
doc/bashref.texi
        - expand the node describing $"..." string translation with additional
          details and examples

                                   3/31
                                   ----
misc.c
        - rl_fetch_history: moved here from vi_mode.c
        - rl_fetch_history: negative arguments count back from the end of
          the history, instead of taking you to the beginning of the history
          list
        - rl_fetch_history: in vi mode, an out-of-range argument rings the
          bell and doesn't change the line

vi_mode.c
        - rl_vi_fetch_history: call rl_fetch_history

readline.h
        - rl_fetch_history: new extern declaration

doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
        - rl_fetch_history: add description

builtins/setattr.def
        - show_var_attributes: if a variable's value indicates that it should
          be ANSI-C quoted, use ansic_quote instead of sh_double_quote to
          format the value string. From proposal by Greg Wooledge
          <greg@wooledge.org>

                                    4/5
                                    ---
arrayfunc.c
        - unbind_array_element: if FLAGS includes VA_ONEWORD, don't use
          skipsubscript to parse the subscript, just assume the entire SUB is
          the subcript and that it contains the closing `]', so we just want
          everything in SUB except the last character.

parse.y:
        - select_command: use compound_list instead of list, like for_command.
          Report by Greywolf <greywolf@starwolf.com>
        - list: move this into compound_list (replacing the instance of `list'
          in the compound_list production), remove from the grammar

                                    4/6
                                    ---
arrayfunc.c
        - unbind_array_element: use VA_NOEXPAND instead of literal 1

                                    4/7
                                    ---
lib/readline/funmap.c
        - default_funmap: add missing `vi-undo' to the list of vi-mode bindable
          functions. Reported by Xirui Zhao <quinean@icloud.com>

                                    4/8
                                    ---

config-top.h
        - DEFAULT_LOADABLE_BUILTINS_PATH: default value for BASH_LOADABLES_PATH

doc/{bash.1,bashref.texi}
        - enable: note that it uses $BASH_LOADABLES_PATH, and that the default
          is system-dependent

variables.c
        - initialize_shell_variables: initialize BASH_LOADABLES_PATH to the
          default given in DEFAULT_LOADABLE_BUILTINS_PATH

                                   4/12
                                   ----
doc/{bash.1,bashref.texi}
        - add link to git master tar file as a place to get the current version

                                   4/14
                                   ----
bashline.c
        - attempt_shell_completion: use -1 as a sentinel value for
          in_command_position indicating that we cannot be in a command position
          (e.g., because we're the target of a redirection) and should not
          check for a programmable command completion or tell the programmable
          completion code to use command completion. Report and fix from
          Marc Aurèle La France <tsi@tuyoix.net>

                                   4/16
                                   ----
builtins/bind.def
        - bind_builtin: reverse sense of strvec_search return value when
          deciding whether or not to remove a unix-command binding from the
          cmd keymap. Bug report by Dale Sedivec <dale@codefu.org>

lib/readline/doc/rltech.texi
        - RL_PROMPT_{START,END}_IGNORE: document current values of \001 and
          \002. Report from Mingye Wang <arthur200126@gmail.com>

                                   4/19
                                   ----
arrayfunc.c
        - assign_assoc_from_kvlist: fix memory leak reported by konsolebox
          <konsolebox@gmail.com>

                                   4/20
                                   ----
command.h,subst.c
        - W_ITILDE: remove, replace with a variable since it's only used inside
          a single call to expand_word_internal

                                   4/21
                                   ----
{subst.c,make_cmd.c,parse.y}
        - W_DQUOTE: no longer used, use W_NOPROCSUB and W_NOTILDE directly
          (for arithmetic commands and words in arithmetic for commands)

                                   4/24
                                   ----
bashline.c
        - executable_completion: since this function gets an unquoted filename
          from rl_filename_completion_function, we need to quote special
          characters before passing it to bash_directory_completion_hook.
          Report from Alex fxmbsw7 Ratchev <fxmbsw7@gmail.com>

                                   4/26
                                   ----
lib/readline/search.c
        - _rl_nsearch_abort: move function calls around so _rl_restore_prompt
          happens before rl_clear_message, like when aborting an incremental
          search. Suggested by sparrowhawk996@gmail.com

subst.h
        - ASS_ALLOWALLSUB: new assignment flag value, means to allow @ and * as
          valid array subscripts when assigning to existing associative arrays

arrayfunc.c
        - assign_array_element: allow assignment of key `@' to an existing
          associative array if the caller passes ASS_ALLOWALLSUB
        - assign_compound_array_list: allow ( [@]=value ) to an existing
          associative array

builtins/declare.def
        - declare_internal: allow assignment of key `@' to an existing
          associative array by passing ASS_ALLOWALLSUB to assign_array_element
          as part of local_aflags. This affects declare, local, and typeset

subst.c
        - do_assignment_internal: allow a[@]=value to an existing associative
          array by passing ASS_ALLOWALLSUB to assign_array_element

                                   4/27
                                   ----
builtins/common.[ch]
        - builtin_bind_var_to_int: wrapper for bind_var_to_int to be used by
          builtin commands; placeholder for future work

builtins/wait.def
        - builtin_bind_var_to_int: use instead of bind_var_to_int

builtins/common.c
        - builtin_bind_variable: allow assignment of key `@' to an existing
          associative array by passing ASS_ALLOWALLSUB to assign_array_element.
          This affects printf and read

builtins/variables.[ch]
        - bind_var_to_int: add third `flags' argument to pass to bind_variable
          instead of always passing 0

redir.c,builtins/common.c,builtins/printf.def
        - bind_var_to_int: change callers, add third flags argument

builtins/common.c
        - builtin_bind_var_to_int: pass ASS_ALLOWALLSUB to bind_var_to_int so
          builtins like wait can assign to assoc[@] and assoc[*]

                                   4/28
                                   ----
bashline.c
        - command_word_completion_function: make sure to initialize
          old_glob_ignore_case before trying to restore from it
        - command_word_completion_function: if we are completing a glob
          pattern, make sure to set rl_filename_completion_desired, so we get
          quoting and appending -- we are completing a filename, after all.
          From a report from Manuel Boni <ziosombrero@gmail.com>

lib/readline/bind.c
        - enable-active-region: separate control of the active region and
          bracketed paste. Still set to the same default value as bracketed
          paste, and enabling bracketed paste enables the active region.
          Now you can enable bracketed paste and then turn off the active
          region.

doc/bash.1,lib/readline/doc/{readline.3,rltech.texi}
        - enable-active-region: document new bindable readline variable and
          its effects

                                   4/30
                                   ----
command.h
        - W_ARRAYREF: new flag, meaning the word is a valid array reference
          with subscript, replaces W_DOLLARSTAR, which was unused

subst.c 
        - expand_subscript_string,expand_array_subscript: new functions to
          parse and expand-and-quote array subscripts. For future use

                                    5/3
                                    ---
builtins/mapfile.def
        - mapfile: if the delimiter is a newline, set unbuffered_read = 1
          for any file descriptor that isn't seekable and lseek sets errno
          to ESPIPE (pipes, FIFOs, maybe terminal devices). If it's not a
          newline, only allow buffered reads if the file descriptor is a
          regular file. Report from Koichi Murase <myoga.murase@gmail.com>

builtins/read.def
        - read_builtin: only set unbuffered_read = 1 if the input is coming
          from a pipe (which we can't seek on) or the input is a terminal and
          we want to read a specified number of characters or we're using a
          non-standard delimiter

                                    5/4
                                    ---

builtins/mapfile.def
        - mapfile: call zsyncfd before calling the callback. Suggested by
          Koichi Murase <myoga.murase@gmail.com>; we'll see how it goes

                                    5/5
                                    ---
subst.h
        - expand_subscript_string: extern declaration

{arrayfunc,subst}.c
        - expand_subscript_string: replace expand_assignment_string_to_string
          with calls to this when expanding array subscripts

subst.c
        - cond_expand_word: call expand_word_internal with Q_ARITH if `special'
          says we should quote for an arithmetic expression context
        - expand_word_internal: call expand_array_subscript when we see `[' in
          arithmetic or array subscript contexts, make conditional on the
          compatibility level later
        - expand_word_internal: make sure W_ARRAYREF makes it through this
          function and into the returned word

                                    5/6
                                    ---

arrayfunc.c
        - array_expand_index: call evalexp with a flag of 0 since we call
          expand_arith_string with Q_ARITH and we want evalexp to remove
          the quotes

execute_cmd.c
        - eval_arith_for_expr,execute_arith_command: now that Q_ARITH has an
          effect on array subscripts (it quotes the special expansion
          characters), call evalexp with 0 as the flags arg so quote removal
          is performed on this quoted argument. Make this conditional on the
          shell compatibility level later
        - execute_cond_command: make sure to expand the argument to -v by
          calling cond_expand_node with Q_ARITH, and correspondingly turn off
          assoc_expand_once when calling unary_test with that argument, since
          we want it to be expanded again to remove the quotes
        - execute_cond_command: expand the arguments to the arithmetic operators
          with Q_ARITH and pass TEST_ARITHEXP to binary_test to ensure that
          it lets evalexp expand the arguments to remove the quoting

test.c
        - arithcomp: if TEST_ARITHEXP is in FLAGS, call evalexp with a flag
          if 0 to force evalexp to expand the arguments to remove the quoting

subst.c
        - param_expand: since we call expand_arith_string with Q_ARITH, we need
          to call evalexp with 0 instead of EXP_EXPANDED for $((...)) expansion
        - expand_word_internal: if we recursively call expand_word_internal to
          expand the contents of a double-quoted string, make sure we pass
          through Q_ARITH if it appears in QUOTED
        - verify_substring_values: call expand_arith_string with Q_ARITH and
          correspondingly call evalexp with 0 instead of EXP_EXPANDED

execute_cmd.c
        - execute_cond_node: if -v is the operator, and the operand is a valid
          array reference, pass TEST_ARRAYEXP flag to unary_test

                                    5/7
                                    ---
builtins/common.[ch]
        - set_expand_once: set array_expand_once to the value passed as the
          first argument, returning the original value

builtins.h
        - ARRAYREF_BUILTIN: new flag for shell builtins, means that the builtin
          can take array references, with subscripts, as arguments

builtins/mkbuiltins.c
        - set ARRAYREF_BUILTIN flag on builtins given in the arrayvar_builtins
          array

execute_cmd.c
        - execute_cond_node: use set_expand_once to set array_expand_once to 0
          before calling unary_test with -v (see change from 5/6)

arrayfunc.c
        - unbind_array_element: allow the caller to choose whether or not a
          subscript of `*' or `@' unsets the entire array by passing
          VA_ALLOWALL in FLAGS. Right now, since the unset builtin doesn't
          pass VA_ALLOWALL, those subscripts unset individual elements for
          associative arrays. We preserve the old behavior of unsetting
          indexed arrays for the time being with new indexed-array-specific
          code

                                    5/9
                                    ---

builtins/shopt.def
        - expand_once_flag: "assoc_expand_once" option now sets this flag,
          calls set_assoc_expand on change
        - set_assoc_expand: sets assoc_expand_once to mirror expand_once_flag;
          placeholder for future changes

builtins/common.h
        - expand_once_flag: extern declaration

                                   5/10
                                   ----
doc/{bash.1,bashref.texi}
        - note that case patterns undergo quote removal. Reported by
          AlvinSeville7cf <alvinseville7cf@gmail.com>

                                   5/11
                                   ----

builtins/bashgetopt.c
        - list_optflags: flags associated with the word corresponding to
          list_optarg, assuming list_optarg is a separate argument

builtins/bashgetopt.h
        - list_optflags: extern declaration

builtins/set.def
        - unset_builtin: set VFLAGS each time through the loop, since we take
          whether or not the word has W_ARRAYREF set into account
        - unset_builtin: don't pass VA_ALLOWALL to unbind_array_element for
          now

test.c
        - unary_test: in the -v case, use assoc_expand_once in the first call
          to valid_array_reference ()

builtins/printf.def
        - printf_builtin: only set VA_ONEWORD if the option argument to -v has
          W_ARRAYREF set (look at list_optflags)

                                   5/12
                                   ----

subst.c
        - expand_array_subscript: don't quote @ or * in the expanded subscript
          at all, even when they are the only character in the subscript. See
          how this works out -- it might uncover places where we need to allow
          `*' and `@' as subscripts where they are not allowed now

expr.c
        - expr_bind_variable: pass ASS_ALLOWALLSUB to bind_int_variable so we
          can allow (( A[@]=value )) when A is an existing associative array

arrayfunc.h
        - AV_ATSTARKEYS: new flag value, means to accept a[@] and a[*] but
          treat them as keys/expressions and not special values

arrayfunc.c
        - array_value_internal: check AV_ATSTARKEYS and don't treat them as
          ALL_ELEMENT_SUB values; they fall through to use as keys/indices

test.c
        - unary_test: if -v is passed an array reference, add AV_ATSTARKEYS to
          the flags passed to array_value so we treat @ and * as keys for an
          existing associative array

                                   5/13
                                   ----

subst.c
        - expand_cond_word: if SPECIAL == 3 (arithmetic expression), dequote the
          resulting WORD_LIST * as if special == 0, because we don't want to
          quote the list for pattern matching. Report from
          Adjudicator Darren <adjudicatordarren@protonmail.com>

                                   5/14
                                   ----
subst.c
        - expand_array_subscript: add double quote (") to the list of characters
          that are backslash-quoted in subscripts after word expansion.
          skipsubscript treats them specially, so you have to quote them to
          do things like `key='"' ; array[$key]=1 ; [[ -v array[$key] ]]'

                                   5/16
                                   ----

builtins/wait.def
        - wait_builtin: if we longjmp to wait_intr_buf, call unset_waitlist if
          we have called set_waitlist (wflags & JWAIT_WAITING). Fixes bug with
          wait -n interrupted by a trapped signal (not SIGINT) reported by
          Jonas Alfredsson <jonas.alfredsson@protonmail.com>

jobs.c
        - wait_sigint_cleanup: restore the old sigint handler before we longjmp
          out by calling restore_sigint_handler()

                                   5/17
                                   ----
builtins/read.def
        - bind_read_variable: now takes an additional argument, flags to pass
          to builtin_bind_variable; change callers
        - SET_VFLAGS: set vflags and bindflags
        - read_builtin: call SET_VFLAGS to set vflags and bindflags from each
          word before calling valid_array_reference and bind_read_variable

builtins/common.c
        - builtin_bind_variable: set vflags (for valid_array_reference) and
          bindflags (for bind_variable/assign_array_element) separately for
          clarity

arrayfunc.c
        - assign_array_element: sanity check: make sure that the subscript
          returned by array_variable_name consumes the entire NAME, otherwise
          flag it as a subscript error. This keeps things like
          `KEY=' ]'; read assoc[$KEY] <<< hello' from assigning to incomplete
          subscripts

builtins/printf.def
        - printf_builtin: if LIST_OPTFLAGS includes W_ARRAYREF, set VA_NOEXPAND
          in VFLAGS

                                   5/17
                                   ----

lib/readline/complete.c
        - compute_lcd_of_matches: move a couple of strlen calls out of a loop
          in calls to mbrtowc; performance improvement only. Report and fix
          from sparrowhawk996@gmail.com

lib/readline/bind.c
        - rl_trim_arg_from_keyseq: take a key sequence and its length and
          return the index into the key sequence following any initial numeric
          argument. Return -1 if there is no numeric argument (the caller is
          expected to make sure) or if the key sequence consists *only* of
          the numeric argument. The caller should use the remainder of the
          key sequence to look up the desired key binding.

lib/readline/readline.h
        - rl_trim_arg_from_keyseq: extern declaration

bashline.c
        - bash_execute_unix_command: if the argument count is > 1 or we have
          an explicit argument, call rl_trim_arg_from_keyseq to get past the
          numeric argument and deal with the rest of the key sequence. We still
          need a way to pass it to the invoked program or function. From
          a report from Jesper Nygards <jesper.nygards@gmail.com>

                                   5/18
                                   ----

bashline.c
        - bash_execute_unix_command: if the user supplied a numeric argument
          when invoking bash_execute_unix_command, pass it to the command in
          the READLINE_ARGUMENT variable

lib/readline/readline.[ch]
        - _rl_del_executing_keyseq: convenience function to `delete' the last
          character added to the executing key sequence. Intended to be used
          before calling rl_execute_next or similar functions that push input
          back to be re-read

doc/{bash.1,bashref.texi}
        - READLINE_ARGUMENT: documented new variable available for commands
          defined using `bind -x' keybindings

lib/readline/doc/rltech.texi
        - rl_trim_arg_from_keyseq: documented new function

                                   5/19
                                   ----

builtins/evalstring.c
        - should_suppress_fork: suppress the fork if we're in a process
          substitution subshell, in addition to being a simple command
          without redirections. From a report back in 10/2020 from
          Hyunho Cho <mug896@gmail.com>

bashline.c
        - command_word_completion_function: if we're trying to complete an
          absolute program (one containing a slash), don't run strcmp or
          strcasecmp on the return value from rl_filename_completion_function,
          since that duplicates work the filename completion function already
          does. From a report back in 1/2021 by awa54@cdak.net

                                   5/22
                                   ----
parse.y
        - CHECK_FOR_RESERVED_WORD: if we are returning an ESAC and unsetting
          PST_CASESTMT, decrement esacs_needed_count

parse.y,shell.h
        - sh_parser_state_t: save and restore esacs_needed_count and
          expecting_in_token in the shell parser state struct and
          save_parser_state/restore_parser_state

print_cmd.c
        - print_simple_command: don't bother to call command_print_word_list
          with an empty list
        - print_simple_command: don't print a space before a redirection list
          if there weren't any command words to print

                                   5/24
                                   ----

lib/sh/input_avail.c
        - nchars_avail: make sure SET and OSET are declared on systems with
          select(2). Reported by Larkin Nickle <me@larbob.org>

parse.y
        - cond_term: if we read a `!' toggle CMD_INVERT_RETURN instead of
          setting it unconditionally. Report and patch from
          Vincent Menegaux <vincent.menegaux@gmail.com> via
          https://savannah.gnu.org/patch/?10070

                                   5/25
                                   ----
doc/{bash.1,bashref.texi}
        - test: add the ( $2 $3 ) case to the description of the four-argument
          behavior. Inspired by a discussion with Christoph Anton Mitterer
          <calestyo@scientia.net>

                                   5/27
                                   ----
doc/bashref.texi
        - replace most of the GNU parallel section with a reference to the
          tutorial on gnu.org

lib/glob/glob.h
        - GX_NEGATE: new flag; indicates whether the pattern is being negated
          as part of an extglob pattern. Not used yet

lib/glob/glob.c
        - extglob_skipname,wextglob_skipname: pass GX_NEGATE to the skipname
          functions if the pattern is being negated. Not checked yet

                                   5/28
                                   ----
doc/{bash.1,bashref.texi}
        - dotglob: add text to clarify that `.' and `..' have to be matched by
          a pattern beginning with `.' or -- and this is the sketchy part --
          that a pattern beginning with `.' has to be one of the patterns in
          an extended glob expression

lib/glob/glob.c
        - skipname,wskipname: perform the special checks for `.' only if the
          pattern is not being negated

                                    6/3
                                    ---
parse.y,shell.h
        - eol_ungetc_lookahead: save and restore as part of the parser state
          included in {save,restore}_parser_state

                                    6/7
                                    ---
lib/readline/display.c
        - puts_face: make sure to cast each member of STR to unsigned char, so
          it's not misinterpreted as EOF, which putc_face does not display.
          Report and fix from Volodymyr Prodan <vovcat@gmail.com> in
          https://savannah.gnu.org/patch/?10076

examples/shobj-conf
        - aix*gcc: change SHOBJ_LD to ${CC}, prefix the SHOBJ_LDFLAGS flags
          with -Wl, so gcc will pass them to the linker. Report from
          lehel@maxer.hu in https://savannah.gnu.org/support/?110505

                                   6/11
                                   ----
doc/{bash.1,bashref.texi}
        - cd: additional arguments are not ignored; they raise an error.
          Report from Douglas McIlroy <douglas.mcilroy@dartmouth.edu>

lib/glob/strmatch.h
        - FNM_DOTDOT: enable special handling for `.' and `..': if FNM_PERIOD
          is not set, `.' and `..' at the start of a string or as a pathname
          component need to be matched by a `.' in the pattern and cannot be
          matched by `?', `*', or a bracket expression
        
lib/glob/glob.c
        - glob_vector: pass FNM_DOTDOT to strmatch() if noglob_dot_filenames
          is not set to enable special handling of `.' and `..'. Prompted by a
          discussion with Nora Platiel <nplatiel@gmx.us>
        - skipname,wskipname: remove special checks for `.' and (disabled)
          checks for `..'

lib/glob/sm_loop.c
        - GMATCH: implement special handling for FNM_DOTDOT and `.' and `..':
          make sure they can't be matched by any special glob characters at
          the start of the string or as a pathname component (if FNM_PATHNAME
          is set). This also means that !(pattern) won't return `.' or `..'
          if dotglob is set
        - GMATCH,EXTMATCH: don't pass FNM_DOTDOT down to recursive calls, like
          FNM_PERIOD, once we process the first character in the string or
          pathname component

lib/glob/smatch.c
        - ISDIRSEP,PATHSEP,SDOT_OR_DOTDOT,PDOT_OR_DOTDOT: provide definitions
          for single-byte or wide character strings for sm_loop.c to use

                                   6/16
                                   ----

doc/{bash.1,bashref.texi},lib/readline/doc/{rluser,rltech}.texi
        - slight wording changes to rewrite gender-specific language. From a
          report by Vipul Kumar <kumar+bug-bash@onenetbeyond.org>, suggested
          language from G. Branden Robinson <g.branden.robinson@gmail.com>,
          Lawrence Velázquez <vq@larryv.me>,
          and Andrew Church <achurch+bash@achurch.org>

builtins/fc.def
        - fc_builtin: make sure an entry in the history list is non-null
          before trying to write it to stdout or the temporary file. From a
          report from Sibo Dong <sibo.dong@outlook.com>

builtins/common.[ch]
        - builtin_arrayref_flags: given a WORD_DESC * (which includes flags)
          and a base set of flags, return a set of flags to pass to
          valid_array_reference and similar functions

builtins/set.def
        - unset_builtin: call builtin_arrayref_flags to set vflags

                                   6/19
                                   ----

parse.y
        - parse_comsub: rewrite to recursively call the parser (yyparse()) and
          return a string constructed from the resulting parse tree. Probably
          will only work with bison. Error reporting is more accurate about
          line numbers and invalid tokens, and command substitution errors 
          are caught earlier, before expansion
        - DOLPAREN: new token, never created by yylex; only ever set by
          parse_comsub and xparse_dolparen to indicate we're recursively
          calling the parser for a command substitution
        - comsub: new grammar production that's triggered by DOLPAREN and
          parses a command substitution, returning a <command>. It's one of
          the possible end states for the top-level parser
        - grammar: only call rewind_input_string if the shell's input is
          coming from a string
        - shell_ungets: push a string back onto the shell input; only used by
          make_here_document for backwards compatibility -- allowing a here-
          document to be terminated by a token at the end of a command
          substitution
        - yylex: don't need any more special handling when returning
          shell_eof_token, but we keep the clause for future work
        - read_token_word: don't handle backslashes (leave them in the input
          stream) if we are reading a command substitution (PST_NOEXPAND)
        - reserved_word_acceptable: allow reserved words after DOLPAREN
        - report_syntax_error: better error handling if we hit EOF while
          looking for the ending right paren in a command substitution
        - parse_string_to_word_list,parse_compound_assignment: make sure to
          turn off parse_comsub sentinel temporarily

make_cmd.c
        - make_here_document: backwards compatibility: if we end a here
          document on the same line as the end of a command substitution,
          allow the token to terminate the here document (without requiring
          a newline) and push the remainder of the line back for the parser
          to consume and terminate the command substitution

builtins/evalstring.c
        - parse_string: if we read shell_eof_token and use it to terminate a
          command, rewind the input string here before returning, instead of
          guessing where to rewind it in the caller

                                   6/22
                                   ----

redir.c
        - do_redirection_internal: if VARASSIGN_REDIR_AUTOCLOSE is non-zero,
          add a redirect to automatically close {var}<fn and other styles of
          varassign redirection. It's zero by default

builtins/shopt.def
        - varredir_close: new shell option, mirrors the value of
          varassign_redir_autoclose. Suggested multiple times by multiple
          people

doc/{bash.1,bashref.texi}
        - varredir_close: document new shell option (the name is tentative)

                                   6/24
                                   ----

parse.y
        - yylex: if read_token returns a value < 0, return YYerror to the
          parser
        - parse_comsub: if the current_token is not shell_eof_token when
          yyparse returns, return an error to read_token_word instead of
          trying to keep parsing. Fixes interactive-only (?) bug reported by
          Koichi Murase <myoga.murase@gmail.com>

parser.h
        - PST_NOERROR: don't print error messages in yyerror(), just reset
          the parser and return

parse.y
        - yyerror: if parser_state & PST_NOERROR, don't print an error message
        - xparse_dolparen: if the flags includes SX_COMPLETE, add PST_NOERROR
          to parser_state, to inhibit error messages. Fixes bug with adding
          lines with incomplete command substitutions to the history list
          reported by Koichi Murase <myoga.murase@gmail.com>

subst.c
        - skip_matched_pair: make sure to pass the SX_COMPLETE flag to
          extract_delimited_string

                                   6/28
                                   ----

lib/readline/bind.c
        - rl_trim_arg_from_keyseq: handle rl_vi_arg_digit if VI_MODE is
          defined. Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_trim_arg_from_keyseq: rework to handle case where the digit
          argument is given as a discrete sequence of multiple rl_digit_argument
          commands (e.g, "M-1 M-2" instead of "M-1 2"). Report and fix from
          Koichi Murase <myoga.murase@gmail.com>

subst.c
        - pat_subst: avoid calling RESIZE_MALLOCED_BUFFER with STRLEN(s) as an
          argument, since it ends up going into a loop. Report and fix from
          Koichi Murase <myoga.murase@gmail.com>

lib/sh/casemod.c
        - cval: take the string length as an argument, to avoid having to call
          strlen every time (in HANDLE_MULTIBYTE mode). The caller already has
          this info. Report and fix from Koichi Murase <myoga.murase@gmail.com>

builtins/complete.def
        - print_cmd_name: single-quote the command name if it contains any
          shell metacharacters
        - print_one_completion: call print_arg with a second arg of 1 if the
          function name contains shell metacharacters. Report and fix from
          Koichi Murase <myoga.murase@gmail.com>

                                   6/30
                                   ----

configure.ac
        - substitute BASE_CFLAGS_FOR_BUILD and STYLE_CFLAGS into Makefile
          targets
        - take STYLE_CFLAGS out of the CFLAGS_FOR_BUILD variable that gets
          substituted
        - remove STYLE_CFLAGS from CFLAGS
        - use `:+' expansion to set variables based on whether $GCC is set
          or null, since configure can do GCC=

support/Makefile.in
        - man2html: remove CCFLAGS_FOR_BUILD from the recipe, leaving only
          LDFLAGS_FOR_BUILD. Report from Jay K <jayk123@hotmail.com>
        - gen-helpfiles: remove CCFLAGS_FOR_BUILD from the recipe, leaving
          only LDFLAGS_FOR_BUILD
        - man2html: use $(STYLE_CFLAGS) in BASE_CCFLAGS variable for C file
          compilation options

{,builtins}/Makefile.in, lib/{sh,readline,malloc,glob}/Makefile.in
        - use STYLE_CFLAGS so specifying CFLAGS=-g to make doesn't clutter the
          output with warnings about parens and format strings

                                    7/9
                                    ---
lib/readline/search.c
        - make_history_line_current: call _rl_free_saved_history_line to clean
          up _rl_saved_line_from_history and get all the code that frees it
          into one place

lib/readline/misc.c
        - _rl_free_saved_history_line: if rl_undo_list points to the data
          member of _rl_saved_line_from_history, set it to NULL to avoid having
          it point to freed memory, since the next thing we do now is to free
          the undo list the data member points to
        - _rl_start_using_history: call _rl_free_saved_history_line instead of
          calling _rl_free_history_entry directly. Fixes memory leak reported
          by Trung Dam <trungdam@yahoo.com>

                                   7/12
                                   ----
lib/readline/search.c
        - make_history_line_current: free rl_undo_list before replacing the
          current line with the line from history, since it is a private
          undo list from reading the search string

lib/readline/rlmbutil.h
        - Since wchar_t/mbrtowc/wcrtomb are limited to 16 bits on Windows
          with MSVC, start abstracting the differences using WCHAR_T/
          MBRTOWC/WCRTOMB

                                   7/13
                                   ----

lib/readline/{complete,display,input,text,util,vi_mode}.c
        - use WCHAR_T/MBRTOWC/WCRTOMB. Part of a set of Windows MSVC fixes
          from sparrowhawk996@gmail.com

builtins/{enable,hash,help}.def
        - enable_builtin: use sh_chkwrite after output to check for write errors

                                   7/16
                                   ----
arrayfunc.c
        - quote_compound_array_word: free SUB and VALUE after assigning from
          sh_single_quote(). From a coverity report from
          Siteshwar Vashisht <svashisht@redhat.com>

bashhist.c
        - bash_remove_history_range: free DISCARD_LIST after freeing its
          elements

bashline.c
        - bash_directory_expansion: add code to free D as a separate branch,
          though it's never hit in practice

builtins/trap.def
        - showtrap: free T even if show_default == 1 if it's a non-default
          trap string

                                   7/17
                                   ----
execute_cmd.c
        - execute_coproc: free NAME on invalid identifier error

lib/glob/glob.c
        - glob_vector: make sure NEXTLINK is allocated using malloc before
          passing it to free()
        - glob_filename: free RESULT before returning glob_error_return when
          there is only a filename

print_cmd.c
        - indirection_level_string: make sure we free PS4 after calling
          decode_prompt_string if *ps4 == 0

subst.c
        - parameter_brace_transform: if vtype == VT_VARIABLE, we need to free
          a non-null VAL

variables.c
        - assign_in_env: if NAME is not a valid shell identifier, free it
          after printing the error message and before returning. These are
          the rest of the fixes from Siteshwar Vashisht <svashisht@redhat.com>

                                   7/22
                                   ----
shell.c
        - main: set dollar_vars[0] to shell_script_filename before calling
          run_startup_files() in the non-interactive case. Restore it after
          run_startup_files returns so we can get better error messages if
          we can't open a script file. Suggested by several people, originally
          by Marc Aurèle La France <tsi@tuyoix.net> back in 2/2021 (in a
          different form) and most recently by Tapani Tarvainen
          <bash@tapanitarvainen.fi>

                                   7/28
                                   ----
trap.c
        - any_signals_trapped: return that a signal is trapped only if it's
          not ignored. This is an additional opportunity for optimization,
          reported in https://bugzilla.redhat.com/show_bug.cgi?id=1981926

                                   7/30
                                   ----
examples/loadables/sleep.c
        - main: if the uconvert conversion fails, but the argument appears to
          contain a GNU-like interval specifier like "1m30s", return
          EX_DISKFALLBACK so the execute_builtin code tries to run the
          external version

builtins/enable.def
        - enable_shell_builtin: if the builtin isn't found, return EX_NOTFOUND
          to allow the caller (enable_builtin) to react differently if it
          wants to
        - dyn_load_builtin: if the shared object isn't found, return EX_NOTFOUND,
          change enable_builtin to deal with it
        - enable_builtin: if there are no supplied options, and we attempt to
          enable a non-existent builtin, try modifying `enable name' to the
          equivalent of `enable -f name name' and return success if we
          successfully load a builtin from a shared object. Proposed several
          times, most recently by Robert Elz <kre@munnari.OZ.AU>

doc/{bash.1,bashref.texi}
        - enable: document new behavior of `enable NAME' when NAME is not a
          current shell builtin

                                    8/3
                                    ---
lib/glob/sm_loop.c
        - GMATCH: check for interrupts or terminating signals each time through
          the loop and return FNM_NOMATCH immediately if received. Let the
          higher layers deal with interrupting the match and jumping out.
          Inspired by a report from andrej@podzimek.org

                                    8/6
                                    ---
subst.c
        - {parameter_brace_remove_pattern,parameter_brace_transform,
           parameter_brace_substring,parameter_brace_casemod,
           parameter_brace_patsub}: make sure the IND argument is of type
           arrayind_t to handle the full range of subscripts. Reported by
           felix@f-hauri.ch

builtins/printf.def
        - printf_builtin: take new format specifier: %Q. This acts like %q
          but applies any supplied precision to the original unquoted
          argument, then quotes that result and outputs the entire quoted
          string, preserving the original field width. Originally suggested
          back in 4/2020 by Sam Liddicott <sam@liddicott.com>

subst.c
        - char_is_quoted: check whether or not we are on the second or later
          line of a command with an unclosed quoted string from a previous
          line. If we are, see if it's closed before the character we're
          checking, so we don't interpret a closing quote as starting a new
          quoted string. Reported several times, most recently by
          Phi Debian <phi.debian@gmail.com> in 6/2021.

                                    8/9
                                    ---
parse.y,subst.c
        - locale_expand: if the variable SINGLEQUOTE_TRANSLATIONS is non-zero,
          single-quote the translated result of $"..." (if it's different from
          the untranslated string)

builtins/shopt.def
        - noexpand_translation: new option to expose the value of
          SINGLEQUOTE_TRANSLATIONS

                                   8/10
                                   ----
doc/{bash.1,bashref.texi}
        - noexpand_translation: add description of new option

                                   8/16
                                   ----
builtins/printf.def
        - printf_builtin: initialize retval after parsing arguments, since we
          use it for the `v' option. Bug report from Keith Thompson
          <Keith.S.Thompson@gmail.com>

lib/sh/unicode.c
        - u32tocesc: fix typo that returned \uXXXXXXXX instead of \UXXXXXXXX.
          From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992257 by
          <nabijaczleweli@nabijaczleweli.xyz>

                                   8/17
                                   ----
siglist.c
        - include command.h before general.h for PARAMS and prototypes. Report
          from Osipov, Michael (LDA IT PLM) <michael.osipov@siemens.com>

                                   8/18
                                   ----
lib/readline/colors.c
        - S_ISBLK: make sure it's defined before we use it, like in complete.c

lib/readline/complete.c,{bashline,variables}.c
        - minor changes to prep for making rl_completer_word_break_characters
          `const'

subst.[ch],pcomplete.c
        - split_at_delims: the DELIMS argument is now `const'; change callers

lib/readline/rlmbutil.h
        - _rl_wcwidth: add function prototype for inline function declaration

lib/readline/bind.c
        - _rl_get_keyname: print keys greater than 160 (which are valid UTF-8)
          as octal escape sequences

lib/readline/text.c
        - do_lowercase_version: return 99999 to prevent the linker from
          combining it with _rl_null_function and optimizing away the separate
          copy. That messes with function pointer comparisons. Part of this
          batch of fixes from sparrowhawk996@gmail.com

                                   8/19
                                   ----
complete.c,readline.c,readline.h
        - rl_completer_word_break_characters: now const char * like
          rl_basic_word_break_characters; element of readline state struct
          used to save it also const. THIS IS AN API CHANGE

bashline.c
        - orig_rl_completer_word_break_characters: now const char * like
          rl_completer_word_break_characters

                                   8/20
                                   ----
bashline.c
        - bash_directory_completion_hook: if direxpand and dirspell are both
          set while trying to complete an absolute pathname as a command, don't
          take a spell-corrected directory name that is shorter than the
          original hint. https://bugzilla.redhat.com/show_bug.cgi?id=1782809

builtins/common.[ch]
        - sh_noassign: convenience function to print an error message when a
          user attempts an assignment to a "noassign" variable. Not used yet

assoc.[ch]
        - assoc_to_kvpair_list: new function, returns a WORD_LIST containing
          key-value pairs as separate words

array.[ch]
        - array_to_kvpair_list: new function, returns a WORD_LIST containing
          index-value pairs as separate words

subst.c
        - string_transform: handle '@k' transform like '@K'
        - valid_parameter_transform: 'k' is a valid transform operator
        - array_transform: handle '@k' transformation by calling one of
          array_to_kvpair_list or assoc_to_kvpair_list and treating the
          result as if expanding the array depending on whether the index is
          `@' or `*' with the usual meanings

doc/{bash.1,bashref.texi}
        - document new '@k' parameter transformation operator

                                   8/27
                                   ----
lib/readline/kill.c
        - rl_unix_filename_rubout: handle pathnames that consist only of one
          or more slashes. The old code went too far and deleted the previous
          word as well. From dabe@dabe.com

                                   8/31
                                   ----
parse.y
        - STRING_SAVER: now save and restore shell_input_line_len; not sure
          why it wasn't done before; fix push_string and pop_string accordingly
        - prompt_again: now takes a parameter FORCE; not used yet (every
          caller passes 0), needs more thought

builtins/evalstring.h
        - open_redir_file: broke code that expands the redirection and opens
          the resultant filename into a new function, called from cat_file

redir.h
        - open_redir_file: extern declaration here for now

builtins/evalstring.c
        - parse_string: takes a new argument: COMMAND **cmdp; if non-null, saves
          the parsed command to *cmdp and lets the caller manage it itself.
          global_command is still not modified. Changed callers in parse.y

                                    9/1
                                    ---
parse.y
        - parse_string_to_command: stripped-down version of xparse_dolparen
          that takes a string, runs it through the parser, and returns the
          resultant COMMAND *; uses parse_string with the new argument

externs.h
        - parse_string_to_command: extern declaration

builtins/evalstring.c
        - can_optimize_cat_file: new function, takes a COMMAND * argument and
          returns true if the command can be optimized like $(<file); changed
          parse_and_execute to call it

subst.c
        - optimize_cat_file: new function, optimizes $(<file) without creating
          a new process. Uses redir_open to open the redirection file, after
          expansion, and calls read_comsub to read from it directly
        - read_comsub: now reads into a 4096 byte buffer (COMSUB_PIPEBUF)
        - command_substitute: if the string begins with a `<' and isn't followed
          by any of "<>&", see if we can optimize the command and call
          optimize_cat_file to do it if we can. 

                                    9/2
                                    ---
configure.ac,config.h.in,lib/sh/setlinebuf.c
        - SETVBUF_REVERSED: remove all references

configure.ac,aclocal.m4
        - AC_OUTPUT: move created files and commands to AC_CONFIG_FILES and
          AC_CONFIG_COMMANDS; call AC_OUTPUT without any arguments
        - require autoconf version 2.63
        - AC_HELP_STRING -> AS_HELP_STRING
        - replace references to $ac_cv_prog_gcc with $GCC
        - AC_C_LONG_DOUBLE -> AC_TYPE_LONG_DOUBLE
        - enable-alt-array-implementation: new configure option, placeholder
          for later

unwind_prot.c
        - stddef.h: include if HAVE_STDDEF_H is defined, not STDC_HEADERS

bashansi.h
        - memory.h: don't include any more; assume <string.h> has all the
          necessary defines

aclocal.m4
        - AC_HEADER_STDC: remove AC_REQUIRE calls to this; change tests to use
          appropriate checks instead of STDC_HEADERS

                                    9/3
                                    ---
configure.ac,config.h.in
        - AC_TYPE_SIGNAL,BASH_TYPE_SIGHANDLER: remove calls, remove mention of
          RETSIGTYPE and VOID_SIGHANDLER
        - AC_USE_SYSTEM_EXTENSIONS: use this instead of AC_ISC_POSIX (which is
          well and truly obsolete) and AC_MINIX (which just calls it anyway).
          All the right defines are already present
        - AC_HEADER_TIME: removed
        - AC_HEADER_STDC: removed
        - AC_DECL_SYS_SIGLIST: replaced with BASH_DECL_SYS_SIGLIST
        - BASH_FUNC_CTYPE_NONASCII: removed

sig.h,lib/readline/signals.c
        - RETSIGTYPE -> void, SIGHANDLER_RETURN -> return

include/posixtime.h
        - don't bother with TIME_WITH_SYS_TIME, just include <sys/times.h> if
          we have it and include <time.h> unconditionally

include/chartypes.h,lib/readline/chardefs.h
        - IN_CTYPE_DOMAIN: no longer uses STDC_HEADERS define, checks against
          CHAR_MAX for non-C89 systems, still a no-op on C89 systems

lib/readline/chardefs.h
        - memory.h: don't include, no need for STDC_HEADERS; assume the mem*
          functions are defined in <string.h> as in C89
        - now that we assume IN_CTYPE_DOMAIN bounds its argument to unsigned
          chars, we don't need NON_NEGATIVE checks at all

lib/readline/chardefs.h,util.c
        - ALPHABETIC -> _rl_alphabetic_p

                                    9/8
                                    ---

lib/sh/strftime.c
        - include <posixtime.h> after reworking above; include <sys/types.h>
          unconditionally in case it defines time_t. From a report by
          Ori Sky Farrell <bash@ori.mx>

                                    9/9
                                    ---
lib/readline/search.c
        - rl_history_search_internal: set rl_undo_list to NULL after calling
          rl_maybe_save_line, since it will be restored one way or another
          after the search completes, and we don't want it to be freed twice
        - rl_history_search_internal: leave the current history offset at the
          position of the last matching history entry. This means that things
          like ^P will start back from that history entry, ^N will move
          forward from there, and operate-and-get-next will work like it does
          with incremental searches. Reported by Vandrus Zoltán
          <vandrus.zoltan@gmail.com>

                                   9/10
                                   ----
aclocal.m4
        - BASH_C_LONG_LONG: removed
        - BASH_TYPE_LONG_DOUBLE: removed
        - BASH_TYPE_LONG_LONG,BASH_TYPE_UNSIGNED_LONG_LONG: removed
        - BASH_FUNC_CTYPE_NONASCII: removed
        - BASH_SYS_SIGNAL_VINTAGE,BASH_SYS_REINSTALL_SIGHANDLERS: don't
          require AC_TYPE_SIGNAL, use void instead of RETSIGTYPE
        - BASH_TYPE_SIGHANDLER: removed

configure.ac,aclocal.m4,config.h.in
        - BASH_TYPE_LONG_LONG: removed, call AC_TYPE_LONG_LONG_INT directly,
          change #define to HAVE_LONG_LONG_INT
        - BASH_TYPE_UNSIGNED_LONG_LONG: removed, call AC_TYPE_UNSIGNED_LONG_LONG_INT
          directly, change #define to HAVE_UNSIGNED_LONG_LONG_INT

externs.h,include/typemax.h,lib/sh/{fmtullong,snprintf,strtoimax,strtoll,
strtoull,strtoumax}.c
        - HAVE_LONG_LONG -> HAVE_LONG_LONG_INT
        - HAVE_UNSIGNED_LONG_LONG -> HAVE_UNSIGNED_LONG_LONG_INT

configure.ac
        - AC_TRY_COMPILE -> AC_COMPILE_IFELSE
        - BASH_CHECK_TYPE (intmax_t) -> AC_TYPE_INTMAX_T
        - BASH_CHECK_TYPE (uintmax_t) -> AC_TYPE_UINTMAX_T
        - BASH_CHECK_TYPE (sig_atomic_t): removed

aclocal.m4
        - BASH_FUNC_STRSIGNAL: changed to use AC_LINK_IFELSE
        - BASH_FUNC_LSTAT: changed to use AC_LINK_IFELSE
        - BASH_FUNC_SBRK: changed to use AC_LINK_IFELSE and AC_RUN_IFELSE,
          fixed typo
        - BASH_CHECK_SPEED_T: changed to use AC_COMPILE_IFELSE
        - BASH_TYPE_SIG_ATOMIC_T: use BASH_CHECK_TYPE instead of AC_CHECK_TYPE
        - BASH_STRUCT_DIRENT: new macro, like _AC_STRUCT_DIRENT but public and
          sets a different bash-specific shell variable
        - BASH_STRUCT_DIRENT_D_{INO,FILENO,NAMLEN}: call BASH_STRUCT_DIRENT
          with a different first argument instead of using inline code and
          AC_TRY_COMPILE

                                   9/11
                                   ----
[prayers for the victims of 9/11/2001]

aclocal.m4
        - BASH_CHECK_DECL: just call AC_CHECK_DECLS and use the default
          includes, which includes the files we used to specify
        - BASH_FUNC_INET_ATON: changed to use AC_LINK_IFELSE
        - BASH_STRUCT_WEXITSTATUS_OFFSET: changed to use AC_RUN_IFELSE
        - BASH_FUNC_OPENDIR_CHECK: changed to use AC_RUN_IFELSE
        - BASH_FUNC_ULIMIT_MAXFDS: changed to use AC_RUN_IFELSE
        - BASH_UNDER_SYS_SIGLIST: changed to use AC_RUN_IFELSE
        - BASH_SYS_SIGLIST: changed to use AC_RUN_IFELSE
        - BASH_FUNC_DUP2_CLOEXEC_CHECK: changed to use AC_RUN_IFELSE
        - BASH_FUNC_GETENV: changed to use AC_RUN_IFELSE
        - BASH_FUNC_GETCWD: changed to use AC_RUN_IFELSE
        - BASH_FUNC_FNMATCH_EXTMATCH: changed to use AC_RUN_IFELSE
        - BASH_FUNC_POSIX_SETJMP: changed to use AC_RUN_IFELSE
        - BASH_FUNC_STRCOLL: changed to use AC_RUN_IFELSE
        - BASH_FUNC_PRINTF_A_FORMAT: changed to use AC_RUN_IFELSE
        - BASH_SYS_PGRP_SYNC: changed to use AC_RUN_IFELSE
        - BASH_SYS_SIGNAL_VINTAGE: changed to use AC_RUN_IFELSE
        - BASH_SYS_NAMED_PIPES: changed to use AC_RUN_IFELSE
        - BASH_CHECK_RTSIGS: changed to use AC_RUN_IFELSE
        - BASH_CHECK_MULTIBYTE: changed to use AC_RUN_IFELSE
        - RL_LIB_READLINE_VERSION: changed to use AC_RUN_IFELSE
        - BASH_CHECK_WCONTINUED: changed to use AC_RUN_IFELSE
        - BASH_FUNC_SNPRINTF: changed to use AC_RUN_IFELSE
        - BASH_FUNC_VSNPRINTF: changed to use AC_RUN_IFELSE
        - BASH_FUNC_FNMATCH_EQUIV_FALLBACK: changed to use AC_RUN_IFELSE
        - BASH_DECL_PRINTF: changed to use AC_RUN_IFELSE
        - BASH_TYPE_RLIMIT: rewrote to avoid quad_t, now uses AC_COMPILE_IFELSE
          to determine whether rlim_t is available, otherwise determines the
          value of RLIMTYPE based on sizeof(rlim.rlim_cur): int, long, or
          long long
        - BASH_SIZEOF_RLIMIT,BASH_SIZEOF_QUAD_T: helper macros for
          BASH_TYPE_RLIMIT in the case that rlim_t is not present

configure.ac
        - BASH_CHECK_DECL -> AC_CHECK_DECLS
        - quad_t: use AC_CHECK_TYPE (new style) instead of BASH_CHECK_TYPE

                                   
                                   9/14
                                   ----
execute_cmd.c
        - time_command: if we longjmp back to the top_level we saved, make sure
          we're in the same subshell environment before printing the timing
          stats. We could have longjmped back from a child process of the
          command or pipeline we want to time. From a report by
          Sergej Alikov <sergej@alikov.com>
        - time_command: restore command->flags even if we longjmp back

general.c
        - check_binary_file: if the first line of the ENOEXEC file starts with
          a `#!', check the rest of the buffer for NULs to determine whether
          this is a binary file. Since we only check the first line, a #! line
          followed by binary data could be confused for a shell script

                                   9/16
                                   ----
bashjmp.h
        - EXITBLTIN: new longjmp `code' value: used by the exit builtin

{execute_cmd,shell,subst,trap}.c,builtins/evalstring.c
        - treat EXITBLTIN exactly the same as EXITPROG (for now)

builtins/exit.def
        - exit_builtin: jump_to_top_level with value EXITBLTIN

builtins/evalstring.c
        - parse_and_execute: EXITBLTIN has its own case, with the same contents
          as EXITPROG

                                   9/17
                                   ----
builtins/evalstring.c
        - parse_and_execute: change EXITBLTIN case to avoid running the
          unwind-protect stack to the `pe_dispose' tag (which has the effect
          of running all the unwind-protects installed by the commands in
          the string) if we're executing in a function and EXIT is trapped.
          This has the effect of running the EXIT trap in the function context,
          which is what we do when we're not in parse_and_execute (eval,
          bash -c, command substitution, etc.)

                                   9/18
                                   ----
arrayfunc.c
        - expand_and_quote_kvpair_word,quote_compound_array_word,
          expand_and_quote_assoc_word,quote_compound_array_list: make sure
          the value has CTLESC characters doubled even when being single-
          quoted, since that's what the parser does with standalone assignment
          statements. From https://savannah.gnu.org/support/?110538

                                   9/19
                                   ----
aclocal.m4
        - AC_TRY_COMPILE -> AC_COMPILE_IFELSE (AC_TRY_LINK calls left to
          modify to avoid obsolete warnings)
        - BASH_STRUCT_WINSIZE: broke out checks for separate headers into new
          macros, call them and work with the results; needed to avoid two
          calls to AC_TRY_COMPILE
        - BASH_CHECK_KERNEL_RLIMIT: avoid multiple calls to AC_TRY_COMPILE by
          breaking basic test for RLIMIT_ defines into a separate test and
          calling the HPUX-specific _KERNEL test only if that fails

m4/gettext.m4,configure.ac
        - AM_GNU_GETTEXT -> BASH_GNU_GETTEXT: remove deprecation warning, since
          [no-libtool] is how we use this; rename to avoid someone's local
          copy from overriding ours

                                   9/20
                                   ----
aclocal.m4
        - BASH_CHECK_MULTIBYTE: take out code that checks for nl_langinfo(CODESET)
          since that's already provided by AM_LANGINFO_CODESET, which is
          called by BASH_GNU_GETTEXT. We AC_REQUIRE it here, though, to avoid
          problems from future changes
        - BASH_SYS_SIGNAL_VINTAGE: broke the code that checks for the different
          signal vintages into different AC_DEFUNed macros, changed
          BASH_SYS_SIGNAL_VINTAGE to stitch them together with shell code
          testing the cached variables
        - AC_TRY_LINK -> AC_LINK_IFELSE: there are no more autoconf warnings

                                   9/21
                                   ----
array.[ch]
        - array_from_argv: new convenience function

array.h
        - num_elements: now an arrayind_t, since that's the type of indices, it
          makes sense to allow that many elements

                                   9/22
                                   ----
lib/readline/terminal.c
        - rl_term_kP: fix typo. Fix from Koichi Murase <myoga.murase@gmail.com>

                                   9/25
                                   ----
lib/readline/display.c
        - rl_clear_visible_line: call _rl_clear_to_eol with _rl_screenwidth as
          the argument so we clear out the entire line even if the terminal
          doesn't have a clear-to-eol sequence; make sure to add a call to
          rl_cr after that so we know we're always in column 0
        - _rl_redisplay_after_sigwinch: just call rl_clear_visible_line instead 
          of erasing the last line of the display
        - _rl_redisplay_after_sigwinch: if the prompt is longer than the screen
          width, make sure to call _rl_reset_prompt to recalculate the
          local_prompt_newlines array. Should fix issue from
          https://savannah.gnu.org/support/index.php?110543

redir.c
        - do_redirection_internal: if given [N]<&WORD- or [N]>&WORD- and WORD
          expands to null, make it identical to <&- or >&- and close file
          descriptor N (default 0). From a discussion back in 5/2021

                                   9/27
                                   ----
arrayfunc.c
        - expand_compound_array_assignment: since we run the string through
          the parser to turn it into a list (so we can make sure all shell
          metacharacters are properly quoted), we need to remove the CTLESC
          the parser uses to quote CTLESC and CTLNUL in *unquoted* words.
          The rest of the code assumes this has been done, and assumes that
          any CTLESC characters passed to expansion are part of the original
          word and should themselves be quoted, doubling the number of CTLESCs

                                   9/28
                                   ----
arrayfunc.c
        - expand_and_quote_kvpair_word,quote_compound_array_word,
          expand_and_quote_assoc_word,quote_compound_array_list: if we are
          single-quoting associative array subscripts and associative and
          indexed array values, we need to quote CTLESC characters, because
          that's how they come out of the parser and how the assignment
          statement code expects to see them.
          Fixes https://savannah.gnu.org/support/index.php?110538

                                   9/29
                                   ----
subst.c
        - parameter_brace_transform: invalid transformation operators are now
          fatal errors in non-interactive shells, as with the other word
          expansions. Reported by Martin Schulte <gnu@schrader-schulte.de> in
          https://lists.gnu.org/archive/html/bug-bash/2020-10/msg00026.html

execute_cmd.c
        - execute_disk_command: if we're optimizing out the fork (nofork) and
          not directly in a pipeline (pipe_in == pipe_out == NO_PIPE), only
          modify shell_level if subshell_environment says we're not already in
          a pipeline. Reported by Paul Smith <psmith@gnu.org> 10/11/2020
          against GNU make

evalstring.c
        - should_suppress_fork: remove #if 1 for code that tries to suppress
          the fork in a process substitution subshell

                                   9/30
                                   ----
builtins/mapfile.def
        - do_chop: make sure we're comparing unsigned chars when checking
          whether the delim is the last character on the line. Reported by
          Greg Wooledge <greg@wooledge.org>

                                   10/1
                                   ----
lib/readline/rltty.c
        - rl_deprep_terminal: if we're not echoing to the terminal
          (_rl_echoing_p == 0), and we just output the bracketed paste end
          sequence, output a newline to compensate for the \r at the end of
          BRACK_PASTE_FINI, since redisplay didn't do it for us. Reported by
          Siteshwar Vashisht <svashisht@redhat.com>

shell.h
        - MATCH_EXPREP: new matching flag, understood only by pattern
          substitution; means to expand unquoted `&' in the replacement
          STRING to the match of PATTERN

subst.c
        - shouldexp_replacement: uncommented
        - pat_subst: we expand & in the replacement string if MATCH_EXPREP
          appears in MFLAGS
        - parameter_brace_patsub: push call to shouldexp_replacement out here,
          after the replacement string is expanded; set MATCH_EXPREP if there
          is an unquoted `&' (by backslash) in the expanded replacement
          string

doc/{bash.1,bashref.texi}
        - pattern substitution: overhauled the description, moved each of the
          possible forms to be tags in the tagged paragraph. The description
          now specifies the expansions that the replacement string undergoes
        - pattern substitution: documented new behavior of unquoted & in the
          replacement string

                                   10/4
                                   ----
shell.c
        - include <malloc/shmalloc.h> if we're debugging malloc (MALLOC_DEBUG)
          so we can get an extern declaration of trace_malloc_stats

                                   10/5
                                   ----
subst.c
        - expand_subscript_string: allocate new memory for td.word, copying
          STRING, in case it gets freed on error by expand_word_internal.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

lib/malloc/malloc.c
        - malloc_usable_size: return the allocated size instead of the chunk
          size, since writing over the bounds checking will cause fatal errors.
          Reported by Julien Moutinho <julm+bash@sourcephile.fr>, fix from
          Dominique Martinet <asmadeus@codewreck.org>

arrayfunc.c
        - unbind_array_elememnt: pass (flags&VA_NOEXPAND) to skipsubscript(),
          instead of unconditionally passing 1 if we're operating on an
          associative array. This is consistent with how valid_array_reference
          determines the length of the subscript.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

                                   10/6
                                   ----

subst.c
        - skip_to_delim: add a new value for FLAGS. If FLAGS&2, we assume that
          START is one character after the opening OPEN. If not, we assume that
          START is at OPEN, and needs to be incremented past it. Part of fix
          from Koichi Murase <myoga.murase@gmail.com>

arrayfunc.c
        - unbind_array_element: make sure to pass FLAGS to skipsubscript with
          bit 2 set, since we are passed a SUB index that's one past the
          opening bracket. Rest of fix from
          Koichi Murase <myoga.murase@gmail.com>
        - array_variable_name: make sure we pass (FLAGS&1) to skipsubscript, so
          we don't inadvertently pass a value with bit 2 set, which would
          cause an off-by-one error in subscript parsing

                                   10/8
                                   ----
trap.c
        - restore_traps: inverse of reset_signal_handlers. This understands
          how reset_signal_handlers changes the signal disposition while
          leaving the trap string in place, and knows how to restore flags
          and state based on that preserved trap string and whether or not
          the signal is "special" to the shell.

builtins/exec.def
        - exec_builtin: instead of using restore_original_signals to completely
          cancel the traps, call reset_signal_handlers so the trap strings are
          preserved. Then if the exec fails (and we're not exiting) we can
          look at the trap strings and see how to restore the trap state.
          This calls restore_traps after reinitializing the shell signal
          handlers, using the trap strings saved by reset_signal_handlers.
          Fixes issue with not exiting after a failed exec clearing the EXIT
          trap reported by Mark March <march@systempad.org>, using the
          approach suggested by Robert Elz <kre@munnari.OZ.AU>

subst.c
        - expand_declaration_argument: when parsing options that modify
          attributes that affect how the value is handled (i, c, u, etc.),
          make sure to create an option string and call make_internal_declare
          with options that start with a `+' so the attribute is off when
          the assignment is performed and changes how the value is expanded.
          From a report by Léa Gris <lea.gris@noiraude.net>

lib/readline/complete.c
        - rl_display_match_list: even if _rl_completion_prefix_display_length
          is set to a non-zero value, pass the common prefix length to
          fnprint if we've turned on colored completion prefixes; passes
          through to fnprint via print_filename
        - fnprint: add the ellipsis if prefix_bytes exceeds the
          _rl_completion_prefix_display_length, add explicit check for
          prefix_bytes being longer since print_filename passes it through
          if colored-completion-prefix is set. This means that while
          completion-prefix-display-length still has precedence over
          colored-completion-prefix, it doesn't override it if both are set
          and the common prefix length is shorter than
          completion-prefix-display-length. From a report by
          Christoph Anton Mitterer <calestyo@scientia.net>

                                   10/10
                                   -----
parse.y
        - parse_dparen: if the last token is FOR, increment word_top and assign
          word_lineno like for other for loops. Fixes bug with LINENO after
          arithmetic for commands reported by
          Tom Coleman <thomas.james.coleman@gmail.com>

                                   10/11
                                   -----
execute_cmd.c
        - shell_execve: if execve fails with ENOENT, but executable_file()
          succeeds, display a slightly more descriptive error message. Prompted
          by a report from Andrea Monaco <andrea.monaco@autistici.org>

stringlib.c
        - strcreplace: allow backslash to escape a backslash, since we allow it
          to escape a `&'

                                   10/14
                                   -----
pcomplib.c
        - COMPLETE_HASH_BUCKETS: double to 512

stringlib.c
        - strcreplace: the last argument is now a flags argument. 1 has its
          previous meaning (glob); 2 means to allow backslash to escape a
          backslash (as added on 10/11)

subst.c
        - pat_subst: call strcreplace with 2 as the flags value

                                   10/15
                                   -----
doc/bashref.texi
        - updates to Installation section

doc/{mkposix,mkinst,mkrbash},doc/Makefile.in
        - changes to allow scripts to be run outside the source directory

                                   10/18
                                   -----
subst.c
        - patsub_replacement: controls whether pattern substitution expands `&'
          in the replacement string. Initialized to 1 by default

                                   10/19
                                   -----
doc/{bash.1,bashref.texi}
        - document bash's WCE SIGINT behavior when job control is not enabled
          and the shell receives a SIGINT while waiting for the foreground
          command to complete. Added at Red Hat's request. A complete
          discussion is at https://www.cons.org/cracauer/sigint.html

                                   10/25
                                   -----
builtins/shopt.def
        - patsub_replacement: new shell option, exposes patsub_replacement
          variable controlling whether pattern substitution expands `&' in
          the replacement string. Still enabled by default.

doc/{bash.1,bashref.texi}
        - patsub_replacement: document new shopt option

                                   10/26
                                   -----
lib/readline/display.c
        - expand_prompt: group runs of invisible characters at the right edge
          of the screen with the previous physical characters when setting
          local_prompt_newlines, since that's how update_line() expects to
          get it. Fix from sparrowhawk996@gmail.com.

lib/readline/macro.c
        - rl_end_kbd_macro: make sure current_macro_index is > 0 after
          subtracting the key sequence length, clamp it to 0 before writing
          the ending NULL. From a fuzzing report by
          Tillmann Osswald <tosswald@ernw.de>

lib/readline/isearch.c
        - _rl_isearch_dispatch: in the bracketed paste case, don't assume the
          pasted text is null-terminated, so use memcpy instead of strcpy for
          the length of the pasted text, then make sure the search string is
          null-terminated. From a fuzzing report by
          Tillmann Osswald <tosswald@ernw.de>

lib/readline/text.c
        - rl_transpose_words: make sure to preserve the value of rl_end from
          the beginning to the end of the function. From a fuzzing report by
          Tillmann Osswald <tosswald@ernw.de>

lib/readline/vi_mode.c
        - rl_vi_delete_to,rl_vi_change_to,rl_vi_yank_to: if we are redoing a
          command (_rl_vi_redoing == 1), save the old _rl_vimvcxt, allocate a
          new one, and restore the old one before returning. Prevents some
          pointer aliasing problems. From a fuzzing report by
          Tillmann Osswald <tosswald@ernw.de>

                                   10/29
                                   -----
arrayfunc.c
        - tokenize_array_reference: take valid_array_reference and add a third
          argument (char **SUBP), which, if non-NULL, gets the null-terminated
          subscript parsed from the NAME argument. If it's NULL, the caller
          gets the old valid_array_reference behavior. Fix from
          Koichi Murase <myoga.murase@gmail.com>
        - valid_array_reference: just call tokenize_array_reference with a
          NULL third argument
        - unbind_array_element: assume the caller (unset_builtin) passes a
          null-terminated SUB that's already been validated by a call to
          tokenize_array_reference so we don't need to call skipsubscript() or
          check VA_ONEWORD. Fix from Koichi Murase <myoga.murase@gmail.com>

arrayfunc.h
        - tokenize_array_reference: extern declaration

builtins/set.def
        - unset_builtin: use tokenize_array_reference to figure out T and pass
          that to unbind_array_element. Fix from
          Koichi Murase <myoga.murase@gmail.com>
        - unset_builtin: pass non-null argument to array_variable_part to get
          the length of the subscript (T), then cut off any final `]' before
          passing it to unbind_array_element, since that's what it now
          expects

subst.c
        - expand_string_for_rhs,expand_string_for_pat: assign td.word from
          newly-allocated memory in case it gets freed on error during the
          call to call_expand_word_internal(); free it manually when that
          call returns

                                   11/1
                                   ----
findcmd.c
        - search_for_command: if FLAGS includes CMDSRCH_STDPATH, don't look in
          the hash table for the command name. Prompted by a report from
          Roger Morris <roger.morris@gmail.com>

aclocal.m4
        - BASH_FUNC_POSIX_SETJMP: add a check by fetching the signal mask
          after the siglongjmp and making sure that SIGINT is not blocked,
          indicating we restored the original signal mask

                                   11/2
                                   ----
subst.c
        - expand_string_assignment: make sure to add W_TILDEEXP to the flags so
          expand_word_internal performs the right tilde expansion on tildes
          following an unquoted colon. Report from Anders Kaseorg
          <andersk@mit.edu>


                                   11/3
                                   ----
aclocal.m4
        - BASH_FUNC_POSIX_SETJMP: if cross-compiling, default to `present' if
          we've determined we have posix signal functions

                                   11/4
                                   ----
execute_cmd.c
        - SET_LINE_NUMBER: set line_number, but don't set line_number_for_err_trap
          if we're already running the ERR trap
        - GET_LINE_NUMBER: evaluates to line_number_for_err_trap if we're
          running the ERR trap and executing_line_number() otherwise
        - execute_function: use GET_LINE_NUMBER to push the value for the line
          number into the BASH_LINENO array
        - execute_command_internal,execute_arith_command,execute_cond_command:
          use SET_LINE_NUMBER to avoid overwriting line_number_for_err trap
          while executing the ERR trap. Tentative fix for `caller' problem
          reported by Quinn Grier <quinn@quinngrier.com>

configure.ac,patchlevel.h
        - set bash version to 5.2-devel, meaning shell_compatibility_level = 52,
          which required updating tests (array.tests, array21.sub,
          quotearray3.sub, new-exp10.sub, history2.sub). The first three are
          because bash-5.2 flushes an indexed array but does not unset the
          variable when given `unset a[@]' or `unset[*]' (that is, it acts
          like `a=()' instead of `unset a'); the other two are because the
          version number changed

                                   11/8
                                   ----
doc/Makefile.in
        - bash.info: use `makeinfo -o' instead of calling infopost.sh to edit
          the filename, since the tags table includes absolute byte offsets to
          nodes. From https://savannah.gnu.org/support/?110557

                                   11/15
                                   -----
examples/loadables/realpath.c
        - add -a NAME argument to put canonicalized pathnames into an indexed
          array instead of displaying them on stdout. Suggested by
          felix@f-hauri.ch

lib/readline/colors.c
        - _rl_custom_readline_prefix: new function, looks in $LS_COLORS for a
          custom extension (*.readline-colored-completion-prefix) and uses that,
          if found, as the default color for the common prefix displayed when
          `colored-completion-prefix' is set. Suggested by
          Christoph Anton Mitterer <calestyo@scientia.net>
        - _rl_print_prefix_color: try the return value from _rl_custom_readline_prefix
          before defaulting to the C_PREFIX (C_SOCK) color. Suggested by
          Christoph Anton Mitterer <calestyo@scientia.net>

lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
        - readline-colored-completion-prefix: document new custom suffix for
          readline's colored-completion-prefix color

                                   11/16
                                   -----
doc/{bash.1,bashref.texi},builtins/set.def
        - set: modify usage synopsis slightly, based on
          https://bugzilla.redhat.com/show_bug.cgi?id=2022324

builtins/set.def
        - unset_builtin: add shell compatibility level check <= bash-5.1 to
          force `unset a[@]' to unset array variable `a', like in previous
          versions, instead of unsetting associative array element `@' or
          removing all elements of an indexed array without unsetting the
          variable itself

builtins/common.c
        - set_expand_once: now a no-op if the shell compatibility level is
          <= bash-5.1, preserving the previous versions' behavior for [[ -v
          (dependent on assoc_expand_once instead of forcing it)

subst.c
        - parameter_brace_expand_rhs: make sure that the final value assigned
          is always returned from ${a:=b}, even when `a' has a variable
          attribute that modifies the value on assignment. Reported back on
          1/20/2021 by oguzismailuysal@gmail.com; bash-5.2 tag removed

                                   11/22
                                   -----
doc/{bashref.texi,bash.1}
        - unset: change the description of `unset name[@]' (unset name[*])
          to reflect the new behavior (unset associative array subscripts or
          remove all elements from an indexed array) and the difference from
          previous versions
        - set: document -r for restricted shell mode
        - restricted shell: change occurrences of `set +o restricted' to
          `shopt -u restricted_shell'. From a report from
          Jin Xiang <jxiang.sd@gmail.com>
        - read: note that read -t0 may return 0 if a subsequent read will
          return EOF. From a suggestion by Dale R. Worley
          <worley@alum.mit.edu>

execute_cmd.c
        - execute_arith_command,eval_arith_for_expr: don't pass EXP_EXPANDED
          to evalexp if shell_compatibility_level > 5.1, assuming that the
          expression has been quoted by Q_ARITH handling

test.c
        - test_arithcomp: if we're being called by the conditional command
          code and treating the arguments to the arithmetic operators as
          expressions, don't pass EXP_EXPANDED to evalexp if the shell
          compatibility level is > 5.1, assuming that the expression has been
          quoted by Q_ARITH handling

                                   11/29
                                   -----
examples/loadables/getconf.[ch]
        - getconf: new implementation of loadable builtin, based on glibc
          getconf

examples/loadables/sleep.c
        - parse_gnutimefmt: parse GNU interval format (2m30s), returning
          seconds and microseconds like uconvert
        - sleep: use parse_gnutimefmt if uconvert can't parse the format right
          away and "dhms" appears in the format string. Don't return
          EX_DISKFALLBACK under any circumstances

                                   11/30
                                   -----

builtins/wait.def
        - wait_builtin: refer to unset_waitlist only if JOB_CONTROL is enabled.
          Report from Joel Ebel <jbebel@google.com>

parse.y,builtins/set.def
        - changes for minimal config restrictions

configure.ac,config.h.in
        - --enable-translatable-strings: new configuration option to allow
          $"..." support to be compiled in or out; not included in the minimal
          shell configuration

shell.c
        - main: don't include any of the dump-strings options if
          TRANSLATABLE_STRINGS is not defined

lib/sh/shquote.c
        - sh_backslash_quote_for_double_quotes: needed for translatable strings

parse.y
        - support for translating $"..." strings now conditional on
          TRANSLATABLE_STRINGS

locale.c
        - locale_expand: now conditional on TRANSLATABLE_STRINGS

subst.c
        - expand_string_dollar_quote: support for $"..." now conditional on
          TRANSLATABLE_STRINGS

doc/bashref.texi
        - --enable-translatable-strings: document new configuration option

                                   12/2
                                   ----
subst.c
        - verify_substring_values: now that the default compatibility level is
          52, and the Q_ARITH code is enabled, make the EXP_EXPANDED flag for
          evalexp() dependent on the compatibility level
        - param_expand: arithmetic substitution: make EXP_EXPANDED flag
          for evalexp() dependent on the compatibility level
        - expand_word_internal: don't call expand_array_subscript if the
          shell compatibility level is 51 or below (Q_ARITH)

test.c
        - test_unop: if the shell compatibility level is > 51, using [@] with
          an existing associative array will report on a key of `@'

arrayfunc.c
        - array_expand_index: if the compatibility level is > 51, Q_ARITH is
          used and we don't pass EXP_EXPANDED to evalexp()

COMPAT,doc/bashref.texi
        - shell compatibility mode: document effects of setting the
          compatibility mode to 51

                                   12/3
                                   ----
lib/malloc/malloc.c
        - mremap: only use if MREMAP_MAYMOVE is defined, since we use the Linux
          version of the function signature

                                   12/6
                                   ----
bashhist.c
        - bash_add_history: if we're parsing a here-document (PST_HEREDOC), only
          suppress adding the newline between lines if we're not at the first
          line of the here-document (here_doc_first_line != 0). From a report
          by S0AndS0 <strangerthanbland@gmail.com>

                                   12/8
                                   ----
lib/readline/colors.c
        - _rl_custom_readline_prefix: use STREQN to check for the extension
          string in $LS_COLORS, since it's not necessarily null-terminated.
          From https://savannah.gnu.org/patch/?10158

                                   12/10
                                   -----
variables.c
        - set_int_value,set_string_value: broke common code for setting int
          and string dynamic variable values out into separate functions;
          changed all callers to use them where appropriate. set_int_value
          takes a flags argument saying whether or not to force the integer
          attribute on
        - assign_random: store the value assigned as the variable value so
          things like RANDOM=42; RANDOM+=7 generate consistent sequences
          like in ksh93
        - assign_seconds: store the value assigned as the variable value so
          things like SECONDS=42 ; SECONDS+=7 generate what's expected

doc/Makefile.in
        - changes to allow man pages that include others (.so FN) to be built
          outside the source tree

                                   12/13
                                   -----
arrayfunc.c
        - assign_array_element_internal: take an additional argument: char **NVALP.
          If non-null, it gets the value eventually assigned to the array
          element
        - assign_array_element: take an additional NVALP argument; pass it to
          assign_array_element_internal

arrayfunc.h
        - assign_array_element: new extern function declaration

{subst,variables}.c,builtins/{common.c,declare.def}
        - assign_array_element: change callers

subst.c
        - parameter_brace_expand_rhs: for the ${param:=value}, use the value
          returned by assign_array_element in NVALP as the return value, since
          it's the value ultimately assigned to the variable after possible
          modification (e.g., arithmetic evaluation). Reported by
          oguzismailuysal@gmail.com after flawed fix applied 11/16

                                   12/14
                                   -----
arrayfunc.h
        - array_eltstate_t: an object that encapsulates an array element's
          state (type, index, key, value) whether it's an indexed or
          associative array

arrayfunc.c
        - {init,flush}_eltstate: new functions to initialize and flush any
          allocated memory from array_eltstate_t objects. No allocation/
          deallocation functions yet; the only use is with a static instance
        - assign_array_element_internal: take an array_eltstate_t * instead of
          a char ** as the final argument, so we can return keys/indices and
          values depending on the type of array; populates it with the
          appropriate values
        - assign_array_element: take array_eltstate_t * as final argument
          instead of a char **; pass it to assign_array_element_internal

{subst,variables}.c,builtins/{common.c,declare.def}
        - assign_array_element: change callers to modify final argument

                                   12/15
                                   -----
arrayfunc.c
        - array_value_internal: now takes an array_eltstate_t * as the final
          argument; there is no more `rtype' argument in favor of the
          `subtype' member; returns the appropriate values in its members
        - array_value: changed to pass array_eltstate_t to array_value_internal,
          saves and fetches its `ind' member into *indp; saves `subtype'
          member into *rtype
        - get_arrary_value: changed to take array_eltstate_t as third argument,
          passes it to array_value_internal

{redir,expr}.c
        - get_array_value: changed callers; initializing the array_eltstate_t
          argument as necessary

test.c
        - test_builtin: changed to use get_array_value, adding AV_ALLOWALL to
          the flags, since it didn't use any QUOTED argument. Pass
          array_eltstate_t * as final argument and get subtype from it (the
          only thing we're interested in, to deallocate memory)

                                   12/16
                                   -----
arrayfunc.c
        - array_value: now takes a final argument of array_eltstate_t *, which
          it passes to array_value_internal; no more rtype and indp args.
          Callers are responsible for marshalling values into estatep

arrayfunc.h
        - array_value: changed function signature

subst.c
        - get_var_and_type,parameter_brace_expand_word: changed calls to
          array_value to use array_eltstate_t argument and initialize it
          appropriately. Copy values back from it to the parameters we need
          to modify

variables.c
        - assign_lineno: call set_int_value to store the value, like with
          RANDOM and SECONDS (from 12/10)

                                   12/17
                                   -----
{eval,execute_cmd}.c
        - when bypassing a parsed command because read_but_dont_execute is
          set, don't modify last_command_exit_value. From a report by
          Robert Elz <kre@munnari.OZ.AU>

parse.y
        - parse_comsub: make sure the first call to shell_getc to check whether
          or not it's an arithmetic expansion skips a quoted newline. From a
          report by Robert Elz <kre@munnari.OZ.AU>

                                   12/21
                                   -----
subst.c
        - parameter_brace_remove_pattern,parameter_brace_patsub,parameter_brace_casemod,
          parameter_brace_transform,parameter_brace_substring: now take an
          array_eltstate_t * argument in place of the arrayind_t argument, pass
          it to get_var_and_type; this generalizes the indexed array behavior
          of expanding array subscripts once to associative arrays via an
          eventual call to array_value_internal with a non-null KEY member
        - get_var_and_type: now takes an array_eltstate_t * argument in place
          of the arrayind_t argument; use it in calls to array_value so we
          can only expand array subscripts once whether they are indexed or
          associative arrays
        - parameter_brace_expand_word: take an array_eltstate_t * argument in
          place of the arrayind_t * argument; pass it to array_value; use a
          static version (which we init and flush) if the argument passed is
          NULL so we can get the right state passed back and forth
        - parameter_brace_expand: pass a pointer to a static array_eltstate_t
          to parameter_brace_expand_word, and use that in the various calls to
          parameter_brace_XXX functions that perform specific expansions in
          place of the old arrayind_t argument; make sure to flush it before
          returning, even on errors

                                   12/22
                                   -----
{trap,variables}.c
        - internal_warning: calls changed to use translatable strings
          consistently

error.[ch]
        - internal_debug: new function, prints a message like internal_warning,
          no-op if DEBUG is not defined
        - INTERNAL_DEBUG: macro that expands to internal_debug when DEBUG is
          defined, and nothing otherwise

{jobs,trap}.c
        - changed some internal_warning and internal_inform calls to use
          internal_debug, since they were active only when DEBUG is defined

parse.y
        - parse_comsub: add internal_debug call when a command substitution
          ends with unterminated here-documents

builtins/common.c
        - number_of_args: unconditionally return posparam_count

{jobs,execute_cmd,subst}.c,parse.y,builtins/{command.def,evalstring.c}
        - INTERNAL_DEBUG: use instead of calls to itrace protected by #ifdef
          DEBUG

                                   12/26
                                   -----
lib/glob/glob.c
        - glob_always_skip_dot_and_dotdot: initialize to 1 (enabled)

builtins/shopt.def
        - globskipdots: new shell option, exposes glob_always_skip_dot_and_dotdot

doc/{bash.1,bashref.texi}
        - globskipdots: document new shell option

execute_cmd.c
        - fix_arrayref_words: call valid_array_reference with 0 for third arg
          because the words have not undergone any word expansions yet and
          the quotes are still present. This makes things like
                A=[\[]=set
                unset A[\[]
          work

subst.c
        - word_list_split: if a word undergoes word splitting but is not
          changed, preserve any W_ARRAYREF flag into the new word. This makes
          things like
                rkey=']'
                unset A[$rkey]
          work because the unset builtin sees the W_ARRAYREF flag on its
          argument

                                   12/29
                                   -----
builtins/common.h
        - SET_VFLAGS: take a set of word flags, and set flags for use with
          valid_array_reference (vflags) and assign_array_element/bind_int_variable
          (bindflags) based on those flags and the setting of assoc_expand_once
          (moved from read.def and generalized)

arrayfunc.c
        - array_variable_name: now exclusively takes AV_xxx flags; understands
          how to translate AV_NOEXPAND to the right flag for skipsubscript;
          understands AV_ONEWORD and AV_NOEXPAND
        - array_variable_part: just passes the FLAGS arg to array_variable_name
        - assign_array_element: translates ASS_ flags to AV_ flags for
          array_variable_name
        - array_value_internal: now just passes flags straight through to
          array_variable_part (which sends them to array_variable_name)

builtins/common.[ch]
        - builtin_bind_var_to_int: now takes a new FLAGS third argument; passes
          it to bind_var_to_int

builtins/printf.def
        - printf_builtin: use SET_VFLAGS to set flags for builtin_bind_variable
          (bindflags); makes things like
                declare -A A; key=']' ; printf -v A[$key] "foo"
          work without a subscript error as long as assoc_expand_once is defined

builtins/read.def
        - read_builtin: use new common version of SET_VFLAGS instead of
          private version; changed to use new calling sequence; makes things like
                declare -A A; key=']' ; read A[$key] <<<"foo"
          work without a subscript error as long as assoc_expand_once is defined

builtins/wait.def
        - wait_builtin: use SET_VFLAGS for variable name with -p option
        - wait_builtin: call builtin_bind_var_to_int with new bindflags third
          argument

expr.c
        - expr_streval: just pass TFLAG (AV_xxx flags) straight through to
          array_variable_part

variables.c
        - bind_int_variable: translate the assignment flags (ASS_xxx) to
          VA_xxx flags for valid_array_reference calls (ASS_ONEWORD); translate
          assignment flags to AV_xxx flags for array_variable_part

                                   12/30
                                   -----
subst.c
        - parameter_brace_expand: when expanding an indirect variable, extend
          the special case for array[@] and array[*] (set -u/no positional
          parameters, obeying the baroque quoting rules) to the value of the
          indirection. Report and fix from konsolebox <konsolebox@gmail.com>

                                   12/31
                                   -----
parse.y
        - compound_list: when parsing a compound_list production, collect any
          pending here-documents after reading a newline, not after reading
          any command terminator. Fixes interactive-only prompting bug
          reported back in 8/2021 by Hyunho Cho <mug896@gmail.com>

                                 1/1/2022
                                 --------
bashline.c
        - set_filename_quote_chars: break code that modifies
          rl_filename_quote_characters based on whether DIRNAME needs to be
          expanded from bash_directory_completion_hook into its own function
        - bash_check_expchar: break code that checks whether DIRNAME will be
          word expanded from bash_directory_completion_hook into its own
          function 
        - bashline_reset,attempt_shell_completion: make sure complete_fullquote
          is set to 1 (as it is by default) in case a completion modifies it
        - bash_quote_filename: if we are completing (but not expanding --
          direxpand is unset) and backslash-quoting a filename with expansion
          characters as determined by bash_check_expchar, make sure
          filename_bstab is set not to include the expansion char (and any
          following char and closer) and set complete_fullquote to 0 so
          sh_backslash_quote uses filename_bstab. Fixes the longstanding issue
          of quoting a `$', for instance, if the rest of the filename contains
          any characters that need quoting in filenames. This assumes that the
          filename is unquoted (*QCP == 0) so the word will be expanded and is
          not part of the filename (if needed, we can use file_exists to check
          whether the expansion characters are actually part of the filename)

                                    1/7
                                    ---
examples/loadables/accept.c
        - new -b bindaddr option to bind to a specific IP address
        - move setsockopt calls before bind() to avoid TIME_WAIT issues. Fixes
          from Dzogovic Vehbo <dzove855@gmail.com>

                                   1/10
                                   ----
configure.ac
        - bumped version to 5.2-alpha.

                                   1/16
                                   ----

tests/{unicode1,glob2,intl2}.sub, tests/run-intl
        - minor changes to add warnings for missing locales that cause test
          failures

                                   1/17
                                   ----
parse.y
        - history_delimiting_chars: if we have a blank line by the time we
          hit the end of the tests, return a semicolon for the first blank
          line to avoid running lines of a multi-line command together.
          Fixes bug reported by Joakim Lindblad <joakim@cb.uu.se>

subst.c
        - expand_string_for_patsub: expand the replacement string for pattern
          substitution assuming that it will eventually be passed to
          strcreplace to replace `&' with the matched portion of the string.
          This calls expand_string_for_pat(), which leaves the string quoted
          and does not perform word splitting, then calls
          quote_string_for_repl to post-process the expanded string.
        - quote_string_for_repl: perform quote removal on passed string while
          replacing CTLESC escaping a `&' or a backslash with a backslash. The
          result must be passed to strcreplace
        - parameter_brace_patsub: call expand_string_for_patsub if
          patsub_replacement is set to quote 

                                   1/18
                                   ----
subst.c
        - read_comsub: make istring_index a size_t to avoid overflow with very
          large values of istring_size.
          From https://savannah.gnu.org/support/index.php?110596
        - expand_word_internal: make istring_index a size_t

                                   1/20
                                   ----
buitins/cd.def
        - add a description of `cd -' to the help text. Suggested by
          Rob Landley <rob@landley.net>

                                   1/21
                                   ----
lib/glob/glob.c
        - glob_vector: if we allocate NEXTLINK using malloc, and free it due to
          some allocation failure, reset FIRSTMALLOC to avoid duplicate frees
          later on

subst.[ch]
        - sub_append_string: the INDX parameter is now a size_t to avoid
          overflow

parse.y
        - decode_prompt_string: RESULT_INDEX is now a size_t to pass to
          sub_append_string

jobs.[ch],nojobs.c
        - wait_for_background_pids: now returns the number of jobs/processes
          reaped

builtins/wait.def
        - wait_builtin: if -p pid supplied without -n, make sure we do something
          useful if no job/pid arguments are supplied and there are no jobs.
          Reported by Oguz <oguzismailuysal@gmail.com>

builtins/read.def
        - read_builtin: if we have a timeout, use SIGALRM instead of select
          when in posix mode, since we use read instead of zread. Fixes bug
          reported by Andreas Schwab <schwab@linux-m68k.org>

subst.c
        - expand_string_dollar_quote: handle single-quoted and double-quoted
          strings that might include $' and $" without attempting translation;
          do more error checking for unterminated $' and $" that leaves those
          characters unmodified. This is for use by readline's various line
          expansion functions (shell_expand_line)

                                   1/23
                                   ----
parse.y,make_cmd.c
        - revert change that unconditionally processes $'...' and $"..." in
          here-document bodies; there are only a couple of cases where they
          should be processed in a double-quote environment

                                   1/24
                                   ----

subst.c
        - extract_dollar_brace_string: if we see another `${' on the rhs of
          the operator, reset the dolbrace_state to DOLBRACE_PARAM while we
          read this new ${...} string
        - extract_heredoc_dolbrace_string: new function, variant of
          extract_dollar_brace_string, to process the WORD in ${PARAM OP WORD}
          while expanding lines of here-document data. It's complicated by the
          requirement to add to the result string as we go along, since we
          need to change the contents of the input string with ansi expansion
          or locale translation.
        - string_extract_single_quoted: take a new third argument: ALLOWESC.
          This allows backslash to escape an embedded single quote, needed by
          extract_heredoc_dolbrace_string to process $'...'; changed callers

                                   1/25
                                   ----
parse.y
        - parse_matched_pair: ansi-expand $'...' in WORD for ${PARAM OP WORD}
          and single-quote the result if dolbrace_state == DOLBRACE_QUOTE
          (posix pattern removal operators) even if extended_quote == 0

subst.c
        - extract_heredoc_dolbrace_string: add logic to align with parse.y:
          parse_matched_pair and its $'...' expansion, including handling
          extended_quote

                                   1/27
                                   ----
builtins/evalstring.c
        - should_optimize_fork: broke conditions for optimizing away the fork
          for a simple command out of optimize_fork into new function, call
          from should_suppress_fork and optimize_subshell_command. Call from
          optimize_fork if (subshell_environment & SUBSHELL_PAREN), relying
          on fact that CMD_TRY_OPTIMIZING is only set in a couple of specific
          conditions
        - optimize_fork: call should_suppress_fork only if startup_state == 2;
          it does the extra checks for that specific case
        - optimize_fork: call should_optimize_fork if we're in a (list)
          subshell (subshell_environment & SUBSHELL_PAREN)
        - optimize_subshell_command: set CMD_TRY_OPTIMIZING on the right side
          of a `&&', `||', or `;' list as long as it's a simple command so
          we can check with optimize_fork() when it's time to execute it

execute_cmd.c
        - execute_in_subshell: call optimize_subshell_command for (list)
          subshells to either set CMD_NO_FORK for simple commands or set
          CMD_TRY_OPTIMIZING for likely candidates for later optimization

builtins/common.h,builtins/evalstring.c
        - optimize_fork: renamed to optimize_connection_fork; changed callers

                                   1/31
                                   ----
include/shmbutil.h
        - COPY_CHAR_I,SCOPY_CHAR_I: add check for locale_utf8locale and
          (c & 0x80) as in other macros

lib/sh/shquote.c
        - sh_backslash_quote_for_double_quotes: rewrote to use array indexing
          and COPY_CHAR_I to make it easier to drop in future calls to
          charvis() to make `unsafe' characters visible if FLAGS == 1

                                    2/1
                                    ---
parse.y
        - parse_comsub: if we are currently expanding aliases, temporarily
          turn off alias expansion if we are not in posix mode so we defer
          alias expansion until command_substitute(). Fixes double-expansion
          bug reported by Martijn Dekker <martijn@inlv.org> and aligns with
          https://www.austingroupbugs.net/view.php?id=1342
        - xparse_dolparen: turn off alias expansion entirely while running the
          parser: either we do it in parse_comsub (posix mode) or in
          command_substitute (default mode)
        - parse_string_to_command: ditto

subst.c
        - command_substitute: if we are expanding aliases, temporarily turn
          off alias expansion if we are in posix mode, since we already
          performed it in parse_comsub() and are using the command string
          reconstituted from the parse result

doc/bashref.texi
        - bash posix mode: add description of alias expansion and command
          substitution parsing and execution

                                    2/4
                                    ---
lib/readline/rltty.c
        - rl_deprep_terminal: set _rl_last_c_pos to 0 after outputting
          BRACK_PASTE_FINI, since the last character in that is \r. Partially
          address issue raised by Markus Schwarzenberg <markus.schwarzenberg@freenet.de>
          in https://lists.gnu.org/archive/html/bug-bash/2022-02/msg00056.html

                                    2/5
                                    ---
doc/{bash.1,bashref.texi}
        - minor typo fixes from Helge Kreutzmann <debian@helgefjell.de>

                                    2/7
                                    ---
{arrayfunc,variables}.c
        - ARRAY_EXPORT: changes to encode array and assoc variables using a
          scheme similar to shell functions so we can export arrays and
          differentiate them from scalar variables and differentiate array
          and assoc variables. Still not enabled by default.

variables.c
        - mk_env_string: third argument is now the variable's attributes or 0,
          with all the attributes we can export arrays

lib/readline/bind.c
        - active-region-start-color,active-region-end-color: new bindable
          string variables, one to set the active region color (instead of
          standout mode) and one to turn it off (instead of the "se" terminal
          capability). They set _rl_active_region_start_color and
          _rl_active_region_end_color variables via functions

lib/readline/display.c
        - putc_face: if setting standout mode, check for both the start color
          and end color variables and output the start color string. If turning
          off standout mode (normal face), output the end color string. Both
          variables must be set

lib/readline/{readline.c,rlprivate.h}
        - declarations for _rl_active_region_start_color and
          _rl_active_region_end_color

                                    2/8
                                    ---
bashline.c
        - initialize_readline: add bindable name `vi-edit-and-execute-command'

shell.c
        - subshell_exit: make sure to set last_command_exit_value before
          calling the exit trap. Fixes bug reported by Greg Edwards
          <gedwards@ddn.com>

                                    2/9
                                    ---
lib/readline/{terminal.c,rlprivate.h}
        - _rl_region_color_on,_rl_region_color_off: functions to output the
          _rl_active_region_start_color and _rl_active_region_end_color
        - _rl_reset_region_color: function to encapsulate setting the region
          color to an arbitrary string, including doing memory management

lib/readline/display.c
        - putc_face: call _rl_region_color_on and _rl_region_color_off instead
          of _rl_standout_on and _rl_standout_off

lib/readline/terminal.c
        - _rl_init_terminal_io: initialize _rl_active_region_start_color and
          _rl_active_region_end_color from _rl_term_so and _rl_term_se,
          respectively; reset every time the terminal is changed
        - _rl_init_terminal_io: turn off the active region for a dumb terminal

lib/readline/bind.c
        - sv_region_{start,end}_color: call _rl_reset_region_color with the
          appropriate value for WHICH

                                   2/10
                                   ----
lib/readline/doc/{rluser.texi,readline.3},doc/bash.1
        - active-region-start-color,active-region-end-color: documented new
          bindable readline variables
        - enable-active-region: document using active-region-start-color to
          highlight the text in the region

                                   2/11
                                   ----
parse.y
        - read_token,read_token_word: make sure characters read by shell_getc
          are protected by appropriate calls to MBTEST when testing for shell
          metacharacters and operators

                                   2/14
                                   ----
builtins/shopt.def
        - set_compatibility_level: if the current compatibility level is outside
          the range of the compatNN options, just leave it alone when
          unsetting one of the options (which by definition was already
          unset). Fixes issue reported by Mihai Moldovan <ionic@ionic.de>

                                   2/16
                                   ----
lib/readline/search.c
        - rl_history_search_{pos,len,flags}: rename to have a leading `_'
        - _rl_history_search_pos: no longer static so other parts of readline
          can see it

lib/readline/rlprivate.h
        - _rl_history_search_pos: extern declaration

lib/readline/readline.c
        - readline_internal_teardown: don't run the undo list against the
          current history entry if the non-incremental search functions have
          set _rl_history_search_pos to it, since it doesn't reflect the
          current contents of the line buffer. Fixes issue reported by
          Andreas Schwab <schwab@linux-m68k.org>

lib/readline/misc.c
        - _rl_start_using_history: initialize _rl_history_search_pos to
          something invalid so it doesn't match where_history()

                                   2/17
                                   ----
lib/readline/callback.c
        - rl_callback_read_char: make sure _rl_eof_found is set to the value
          of eof before calling the deprep terminal function, so it can do
          different things based on whether the input code read EOF (or the
          user entered the EOF character). From a gdb discussion started by
          Andrew Burgess <aburgess@redhat.com> (still more to do, since this
          is not part of the public API)

                                   2/18
                                   ----
lib/readline/readline.h
        - RL_STATE_EOF: new readline state value; set when readline reads an
          EOF character on an empty line or a read returns an error
        - rl_eof_found: new public variable

lib/readline/rprivate.h
        - _rl_eof_found: renamed to rl_eof_found, so not declared here

lib/readline/{callback,readline}.c
        - RL_STATE_EOF: set appropriately when readline gets an EOF. Suggested
          by Andrew Burgess <aburgess@redhat.com>
        - RL_STATE_EOF: make sure it's not set when readline starts
        - rl_eof_found: set appropriately when readline gets an EOF

lib/readline/{callback,readline,rltty}.c
        - rl_eof_found: new name for _rl_eof_found

lib/readline/doc/rltech.texi
        - RL_STATE_EOF: document

                                   2/19
                                   ----
parse.y
        - parse_comsub: turn off parser state flags we don't want to inherit
          into this call to the parser (PST_REGEXP, PST_EXTPAT, PST_CONDCMD,
          PST_CONDEXPR for now). Fixes bug reported by konsolebox
          <konsolebox@gmail.com>

                                   2/23
                                   ----
findcmd.c,builtins/hash.def
        - replace calls to is_directory with file_isdir, which only performs a
          stat and doesn't do the eaccess call to check for an executable file

findcmd.c
        - find_in_path_element: takes a new RFLAGSP argument, an int * where
          the status flags for the returned pathname are returned; saves
          additional calls to stat/eaccess
        - search_for_command: get the returned flags from
          find_user_command_in_path so we don't need any additional calls to
          file_status after we find the command in $PATH

                                   2/24
                                   ----
doc/{bash.1,bashref.texi}
        - FUNCTIONS: some small changes to the description of local variables
          and dynamic scoping, with emphasis on how that affects `unset'
          behavior. Inspired by a discussion with
          Christoph Anton Mitterer <calestyo@scientia.net>

                                   2/25
                                   ----
examples/loadables/realpath.c
        - renamed -s option to -q to align with other versions
        - perform array assignment for `-a varname' even if -q option supplied  
        - renamed -S option to -s for Linux compatibility

                                   2/28
                                   ----
lib/readline/misc.c
        - _rl_free_saved_history_line: call rl_free_undo_list, saving and
          setting rl_undo_list to the saved history line's data, so the right
          call to _hs_replace_history_data happens and we don't end up with
          a pointer aliasing problem. Fixes core dump reported by 
          Andreas Schwab <schwab@linux-m68k.org>, but does not make his
          scenario equivalent to incremental search

                                    3/1
                                    ---
lib/readline/search.c
        - make_history_line_current: save the current line before replacing it
          with the found history entry using rl_maybe_save_line
        - noninc_dosearch: we don't want the saved history line, so free it
          after calling make_history_line_current
        - _rl_history_search_internal: call rl_maybe_replace_line after making
          changes to the line buffer with make_history_line_current so we can
          save the undo list we constructed before we set the history position

                                    3/2
                                    ---
lib/readline/display.c
        - expand_prompt: add missing piece to patch from 10/26/2021: if we are
          recalculating the number of invisible characters on the first line
          of the prompt, we need to update INVFL, even if we already set it
          when we hit the number of physical characters. This ends up being
          assigned to prompt_invis_chars_first_line, and is used in several
          subsequent calculations. Reported by
          Andreas Schwab <schwab@linux-m68k.org>

lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
        - enable-bracketed-paste: add some language making it clearer that
          bracketed paste prevents the pasted text from being interpreted as
          editing commands. Suggested by Karl O. Pinc <kop@karlpinc.com>

                                    3/4
                                    ---
make_cmd.c
        - make_here_document: perform quote removal on the here-doc delimiter
          only if it's marked as quoted, which prevents quotes from inside a
          command substitution from being removed (they're supposed to begin a
          new quoting context) when the word itself isn't flagged as quoted
          (which means the body of the here-document gets expanded). You can't
          perform quote removal *and* expand the here-document lines. From an
          austin-group discussion back in early February

lib/sh/strvis.c
        - charvis -> sh_charvis; change caller
        - sh_charvis: now take an additional SLEN argument to avoid having to
          compute the string length every time; change callers
        - sh_charvis: add a utf-8 locale-specific check before calling
          COPY_CHAR_I (in practice, doesn't make any real difference)

                                   3/10
                                   ----
arrayfunc.c
        - convert_var_to_array: if we're being asked to create an associative
          array (flags & 2), and we have an existing variable that is not an
          assoc array (and not an existing indexed array), call
          convert_var_to_assoc to make it one

                                   3/11
                                   ----
jobs.c
        - wait_for: don't call get_tty_state() if readline is dispatching
          (RL_STATE_DISPATCHING) with the terminal settings changed
          (RL_STATE_TERMPREPPED), the same way we don't if we are running a
          command for programmable completion. Fixes bug with SIGINT reverting
          to the saved readline terminal settings reported by
          Markus Napierkowski <markus.napierkowski@cyberus-technology.de>

parse.y
        - decode_prompt_string: make sure the expansion of \w, \W, and \s
          are all run through sh_strvis before calling
          sh_backslash_quote_for_double_quotes or just through sh_strvis if
          we're not running the prompt string through word expansions.
          Fixes issue reported by Josh Harcome <joshharc@gmail.com> back
          in mid-January

                                   3/16
                                   ----
bashline.c
        - bash_quote_filename: if we have a word to complete that contains
          characters that introduce a word expansion, make sure the passed
          string does *not* exist as a filename before removing those
          characters from the set that must be backslash-quoted. See change
          from 1/1/2022

                                   3/18
                                   ----
lib/readline/search.c
        - make_history_line_current: don't free rl_undo_list or
          _rl_saved_line_for_history; don't unconditionally save the history
          line. This reverts some of the changes to support setting the
          history position in history-search-backward
        - rl_history_search_internal: only free the saved history line if we
          were the ones who created it

                                   3/21
                                   ----
lib/readline/nls.c
        - xmalloc.h: include for systems without setlocale(), so xfree has a
          prototype. Report and fix from András Kucsma <r0maikx02b@gmail.com>

lib/readline/search.c
        - _rl_history_search_internal: use previous-history/next-history to
          move to the found history line instead of directly calling
          history_set_pos. This makes the behavior more similar to incremental
          search
        - rl_history_search_internal: make sure to set rl_undo_list to the
          current history undo list around the calls to rl_get_previous_history
          or rl_get_next_history, in order to fool the call to
          maybe_replace_line they make

lib/readline/readline.c
        - _rl_executing_func: the currently-executing readline command function

lib/readline/rlprivate.h
        - _rl_executing_func: extern declaration

lib/readline/search.c
        - _rl_history_search_internal: removed (commented out) code that sets
          the current history entry to the found history entry, too much
          assumes that the current undo list should be applied to the current
          history entry (where_history())

                                   3/23
                                   ----
subst.c
        - parameter_brace_expand_word: if we have double-quoted ${*} or ${@},
          make sure we are setting W_HASQUOTEDNULL in the flags we return to
          the caller if we are returning QUOTED_NULL(word)
        - parameter_brace_expand_word: if we have a double-quoted associative
          array reference using `*' or `@', make sure we are setting
          W_HASQUOTEDNULL in the flags we return to the caller if we are
          returning QUOTED_NULL(word)
        - parameter_brace_expand: if we're using the `[:]+' word expansion
          operator, we need to note a quoted null string and pass the
          W_QUOTEDNULL flag back to the caller
        - expand_word_internal: make sure to return a QUOTED_NULL
          (word[0] == CTLNUL) back to the caller if HAD_QUOTED_NULL is set,
          regardless of whether or not we see a quoted dollar at. Fix for bug
          reported by Andreas Luik <andreas.luik@innovative-navigation.de>

arrayfunc.c
        - array_value_internal: fix typo and set estatep->type to ARRAY_INDEXED
          for indexed arrays

                                   3/31
                                   ----
lib/readline/{history.c,histlib.h}
        - _hs_at_end_of_history: convenience function to tell whether or not
          the current history position is at the end of the history list

                                    4/1
                                    ---
lib/readline/search.c
        - make_history_line_current: don't free rl_undo_list if it is equal to
          _rl_saved_line_for_history->data, since we will need to restore it
         later if we got it from a history entry. Fixes issue dating back to
         7/2021 and changes to _rl_free_saved_line_for_history, current issue
         reported by Andreas Schwab <schwab@linux-m68k.org>

                                    4/5
                                    ---
lib/readline/{complete,histfile,histsearch,isearch,terminal}.c
        - xfree: use instead of free

                                    4/7
                                    ---
configure.ac
        - bumped version to bash-5.2-beta

[bash-5.2-beta frozen]

                                    4/8
                                    ---
lib/readline/input.c
        - _rl_orig_sigset: need extern declaration if HAVE_SELECT is defined.
          From https://savannah.gnu.org/support/?110634

examples/loadables/seq.c
        - PRIdMAX: redefine if PRI_MACROS_BROKEN is defined.
          From https://savannah.gnu.org/support/index.php?110635

                                   4/11
                                   ----
configure.ac
        - BASH_FUNC_STRTOIMAX: replace strtoimax if the system doesn't provide
          a declaration in a standard header file. Uses new m4/strtoimax.m4.
          From https://savannah.gnu.org/support/index.php?110633

builtins/printf.def
        - getdouble: new function, parses string into `double' using strtod
        - printf_builtin: check for the `L' length modifier and use long
          doubles for the floating point conversion specifiers. If it's not
          supplied, use `double' when in posix mode (as posix specifies) and
          long double (if it's available, double if not) in default mode.
          From a report from Paul Eggert <eggert@cs.ucla.edu>

                                   4/12
                                   ----
lib/sh/oslib.c
        - bzero: update function signature to modern BSD version

                                   4/14
                                   ----
lib/sh/oslib.c
        - bcopy, gethostname, mkfifo: update function signatures to modern
          versions

                                   4/15
                                   ----
jobs.c,nojobs.c
        - wait_for_single_pid: if the pid or job argument is invalid -- isn't
          a child of this shell -- return 257, which is out of the range of
          valid 8-bit status values

execute_cmd.c
        - execute_pipeline: if wait_for_single_pid returns > 256, set it to
          127 (invalid process)

jobs.c
        - wait_for_background_pids: if wait_for_single_pid returns > 256, set
          the status we return in PS to 127 (what it was before)

builtins/wait.def
        - wait_builtin: if wait_for_single_pid returns > 256, treat it as an
          error and set pstat.pid to NO_PID
        - wait_builtin: if -p supplied, and we get to the end of the argument
          list with PSTAT.PID != NO_PID (which we assume means that the return
          value is set from PSTAT.STATUS), set the variable name to PSTAT.PID.
          From a report by Robert Elz <kre@munnari.OZ.AU>
        - wait_builtin: for compatibility with the netbsd sh, leave the variable
          name specified with `-p' unset if there are no PID arguments.
          From a report by Robert Elz <kre@munnari.OZ.AU>

                                   4/17
                                   ----
parse.y
        - xparse_dolparen: if (flags & SX_NOLONGJMP), don't call
          jump_to_top_level() on errors

bashline.c
        - bash_quote_filename: don't call quote_word_break_chars() unless we
          have word break chars initialized. Fixes bug reported by
          Sam James <sam@gentoo.org>

                                   4/18
                                   ----
pcomplete.c
        - gen_globpat_matches: call glob_filename with the GX_GLOBSTAR flag if
          the `globstar' shell option is enabled. From a report by
          Steve <bash@lonetwin.net>

lib/malloc/malloc.c
        - internal_free: remove the GLIBC21 code (!)
        - internal_free: make the code that tests against memtop and calls
          lesscore depend on USE_LESSCORE being defined, which it is by
          default

lib/malloc/imalloc.h
        - USE_LESSCORE: define

parse.y,shell.h
        - token_buffer_size and its corresponding saved value in the shell's
          parser state are now size_t instead of int

stringlib.c
        - strsub,strcreplace: use size_t instead of int for local length and
          indexing variables

lib/sh/zmapfd.c
        - zmapfd: use size_t instead of int for local length and indexing
          variables

lib/sh/zgetline.c
        - zgetline: use size_t instead of int for local length and indexing
          variables

                                   4/20
                                   ----
pcomplete.c
        - init_itemlist_from_varlist: free VLIST after assigning it from
          *SVFUNC and after we get the variable names and values out of it.
          Report from Robert E. Griffith <bobg@junga.com>

                                   4/25
                                   ----
redir.c
        - here_document_to_fd: if the shell compatibility level is bash-5.0 or
          earlier, use tempfiles for all here-documents and here-strings. From
          a bug-bash discussion started by Sam Liddicott <sam@liddicott.com>

                                   4/26
                                   ----
parse.y
        - parse_comsub: non-interactive shells exit on a syntax error while
          parsing the command substitution
        - parse_comsub: unset additional PARSER_STATE flags before calling
          yyparse(). Inspired by https://bugs.gentoo.org/837203; unsetting
          PST_COMPASSIGN is the fix for that bug
        - parse_string_to_word_list: use save_parser_state/restore_parser_state
          instead of saving pieces of the shell state in individual variables
        - parse_compound_assignment: use save_parser_state/restore_parser_state
          instead of saving pieces of the shell state in individual variables
        - parse_compound_assignment: unset additional PARSER_STATE flags before
          calling read_token(); set esacs_needed_count and expecting_in_token
          to 0 like in parse_comsub() since read_token can use them

                                   4/27
                                   ----
lib/sh/strvis.c
        - sh_charvis: changes to handle being compiled without multibyte support

                                   4/29
                                   ----
lib/readline/callback.c
        - rl_callback_read_char: don't set rl_eof_found unless eof is > 0,
          since it can be -3 if we need to read more input in a multi-key
          sequence. Report from Andrew Burgess <aburgess@redhat.com>

examples/loadables/Makefile.sample.in
        - new file, containing the rules to build the example shared object
        - includes Makefile.inc from wherever it's installed. Suggested by
          Robert E. Griffith <bobg@junga.com>

examples/loadables/Makefile.inc.in
        - remove rules that create the example shared object

                                   4/30
                                   ----
builtins/evalstring.c
        - parse_and_execute: check for terminating signals before returning,
          after any longjmp, to improve responsiveness and fix the -c code
          path before running any exit trap. Report from
          Emanuele Torre <torreemanuele6@gmail.com>

                                   5/17
                                   ----
builtins/suspend.def
        - suspend_builtin: the -f option now forces a suspend even if job
          control is not enabled. Inspired by a discussion with
          Robert Elz <kre@munnari.OZ.AU>

doc/{bash.1,bashref.texi}
        - suspend: updated description to include expanded -f behavior

                                   5/25
                                   ----
builtins/mkbuiltins.c
        - -includefile: new argument, specifies extern filename to insert
          into the #include statement in the structfile (builtins.c) and
          the filename in the comment in the extern file (builtext.h).
          From Alexander Kanavin <alex.kanavin@gmail.com> via
          https://savannah.gnu.org/patch/?10210

builtins/Makefile.in
        - builtins.c: change call to mkbuiltins to add -includefile option
        - builtins.c: change recipe to run all the commands in the same shell
          invocation
        - builtins.c: change recipe to specify new filenames in the call to
          mkbuiltins and move them onto builtins.c/builtext.h if the new ones
          are different; make the new filenames use the current make recipe
          shell pid in the filename ($$RECPID).
          Inspired by Alexander Kanavin <alex.kanavin@gmail.com> via
          https://savannah.gnu.org/patch/?10210

                                    6/2
                                    ---
builtins/common.c
        - builtin_find_indexed_array: new function, factored common code out
          of mapfile and read builtins to find an in-scope indexed array or
          create one 

builtins/common.h
        - builtin_find_indexed_array: extern declaration

builtins/{mapfile,read}.def
        - change callers to use builtin_find_indexed_array

variables.c
        - unbind_global_variable, unbind_global_variable_noref: new functions
          that remove variables from the global_variables table

lib/sh/shmatch.c
        - sh_regmatch: use unbind_global_variable_noref to make sure we act on
          the copy of BASH_REMATCH in the global scope all the time, ignoring
          any local variables that might exist. Tentative fix for memory leak
          report from Emanuele Torre <torreemanuele6@gmail.com>

doc/{bash.1,bashref.texi}
        - BASH_REMATCH: add caveat about making it a local variable

                                    6/6
                                    ---
print_cmd.c
        - print_redirection: if the redirectee for r_duplicating_output_word
          (r_duplicating_input_word) is 1 (0), don't print it; only print a
          non-default file descriptor number
        - print_redirection_list: remove the code that tries to temporarily
          translate a >&word redirection to >&word now that we won't print a
          non-default file descriptor number. Fixes issue with `declare -f' and
          function export reported by Namikaze Minato <lloydsensei@gmail.com>

                                   6/13
                                   ----
configure.ac
        - bumped version to bash-5.2-rc1

[bash-5.2-rc1 released]

                                   6/15
                                   ----
parse.y
        - parse_string_to_word_list: save the parser state before any state-
          changing functions like bash_history_disable(). Reported by
          Clark Wang <dearvoid@gmail.com>

                                   6/16
                                   ----
doc/bash.1
        - play tricks with the value of the zZ number register to refer to
          `bash(1)' instead of `above' or `below' when creating the builtins
          man page

                                   6/17
                                   ----
doc/{bash.1,bashref.texi}
        - wait: note that wait will return > 128 if interrupted by a signal.
          Reported by AA <aathan_github@memeplex.com>

execute_cmd.c
        - {execute_cond_node,execute_arith_command,eval_arith_for_expr}: make
          sure to reset this_command_name after running any DEBUG trap so the
          DEBUG trap doesn't overwrite it.
          Reported by Emanuele Torre <torreemanuele6@gmail.com>.
        - execute_select_command: set this_command_name to NULL after running
          any DEBUG trap like execute_for_command does

                                   6/23
                                   ----
test.c
        - three_arguments: when given [ ! ! arg ], make sure to advance POS
          after calling two_arguments to avoid a `too many arguments' error.
          Report from Steffen Nurpmeso <steffen@sdaoden.eu>

                                   6/27
                                   ----
subst.c
        - expand_word_internal: when expanding backquoted command substitution,
          call string_extract with the SX_REQMATCH flag (closing backquote
          required) only if the word flags don't contain W_COMPLETE,
          indicating that we're doing this for completion, probably to
          determine whether or not to append something to the word. Fixes bug
          reported by Emanuele Torre <torreemanuele6@gmail.com>.

                                    7/5
                                    ---
execute_cmd.c
        - execute_connection: treat a connector of '\n' the same as ';'

print_cmd.c
        - print_comsub: new function, sets flag noting we are printing a
          command substitution and calls make_command_string
        - make_command_string_internal: add '\n' to the ';' case; print command
          list with newline connector appropriately

parse.y
        - parse_comsub: call print_comsub instead of make_command_string
        - list1 production (part of compound_list): if a list is separated by
          newlines, and the parser is parsing a command substitution, make
          the connection command with a '\n' connector. Makes the text
          output of parse_comsub closer to the original source text. From a
          report from Martijn Dekker <martijn@inlv.org>

                                    7/6
                                    ---
doc/bash.1,lib/readline/doc/rluser.texi
        - complete: add note about arguments passed to command specified by
          `complete -C'; suggested by Mark Chandler <mcp@synq.so>

builtins/setattr.def
        - show_local_var_attributes: special-case `local -', since there is
          no `declare -' equivalent.
          Reported by Emanuele Torre <torreemanuele6@gmail.com>.
        - show_all_var_attributes: use `local -' when printing a variable named
          `-' at the current non-zero variable context

parse.y
        - shell_getc: if we are at the end of an alias, returning a space,
          make sure we mark the previous character as single-byte by modifying
          shell_input_line_property so the space we return is properly
          recognized. This would fail before if the last character of the
          alias was a multi-byte character. Reported by
          Vangelis Natsios <vnatsios@gmail.com>

                                   7/12
                                   ----
lib/readline/isearch.c
        - rl_display_search: don't call rl_redisplay_function before returning;
          rl_message already calls it. Reported by
          Frédéric Moulins <frederic@moulins.org>

configure.ac
        - bumped version to bash-5.2-rc2

                                   7/18
                                   ----
jobs.c
        - set_job_control: don't bother calling tcgetpgrp if shell_tty < 0,
          since it will just fail

variables.c
        - reset_local_contexts: new function, delete all context tables
          associated with shell functions and set variable_context to 0.
          Called when we want to stop executing in a shell function without
          going through the pop_context chain with its side effects

variables.h
        - reset_local_contexts: extern declaration

builtins/evalstring.c
        - parse_and_execute: call reset_local_contexts instead of setting
          variable_context to 0

eval.c
        - reader_loop: call reset_local_contexts in cases where the shell has
          longjmped for a fatal error and errexit is enabled (ERREXIT), but
          not for other cases, and especially not for the exit builtin,
          instead of just setting variable_context to 0. Fixes issue originally
          reported by Robert Stoll <robert.stoll@tegonal.com>

subst.c
        - pat_subst: implement sed-like behavior when presented with a null
          pattern that's anchored at the start or end of the string, or when
          presented with a null string: process the replacement string for `&'
          and `\&' and substitute in the result as before. Patch from
          Koichi Murase <myoga.murase@gmail.com>

                                   7/20
                                   ----

[bash-5.2-rc2 frozen]

                                   7/27
                                   ----
parse.y
        - reset_parser: set need_here_doc, esacs_needed_count, expecting_in_token
          all to 0, since jumping back to a top-level parse needs that
        - parse_comsub: make sure to reset expand_aliases and shell_eof_token
          if we're not going to exit immediately out of this function

                                   7/28
                                   ----
parse.y
        - parse_comsub: if the compatibility level is <= 51, set extglob while
          parsing the command substitution, so bad pattern errors can still be
          caught but valid patterns are let through and can be evaluated at
          runtime, when extglob may have been set. If it isn't set, it will
          still be a parser error when the command substitution is executed.
          Fixes report from Sam James <sam@gentoo.org> about gentoo scripts.
        - reset_parser: set extended_glob from global_extglob if the parser
          state includes PST_CMDSUBST
        - xparse_dolparen: set global_extglob but don't modify extended_glob,
          so parse errors can be caught before forking a child for command
          substitution, as part of word expansion, but after extglob may have
          been set by command execution (e.g., in a shell function)

                                    8/5
                                    ---
[bump version to bash-5.2-rc3]

                                    8/6
                                    ---
trap.c
        - run_pending_traps: move code from evalstring() so we call
          parse_and_execute() directly and handle any `return' invocations so
          we can restore the value of running_trap. Otherwise, if we longjmp
          past this function, we will think we're running a trap after we
          finish. Prompted by post from Koichi Murase <myoga.murase@gmail.com>

                                    8/9
                                    ---

lib/readline/nls.c
        - _rl_current_locale: private variable, stores the value of the
          LC_CTYPE locale category, as determined by _rl_init_locale; set
          to allocated memory in _rl_init_locale()
        - _rl_set_localevars: new function, code from _rl_init_eightbit that
          checks the current locale (passed as an argument) and sets the
          various locale-aware variables based on it. It accepts a second
          argument: FORCE. If non-zero, it means to restore the default "C"
          locale values if the locale is "C" or "POSIX", now that this
          function can be called multiple times
        - _rl_init_eightbit: now just calls _rl_init_locale and
          _rl_set_localevars
        - _rl_reset_locale: new function, checks whether our the locale has
          changed since we last called _rl_init_locale to set our internal
          idea of its value. If it has changed, call _rl_set_localevars with
          the new locale and a FORCE argument of 1 to change the
          locale-dependent variables.

lib/readline/rlprivate.h
        - _rl_reset_locale: extern declaration

lib/readline/readline.c
        - rl_initialize: call _rl_reset_locale instead of _rl_init_locale so
          the internal readline variables get set when we move from a non-
          multibyte locale ("C") to a multibyte one ("en_US.UTF-8"). Report
          from Alan Coopersmith <alan.coopersmith@oracle.com>

                                   8/16
                                   ----
lib/sh/setlinebuf.c
        - sh_setlinebuf: allocate buffers for line-buffering stdout and stderr
          only once, the first time it is requested. Only allocate memory if
          we're using setvbuf (we usually are). Double the buffer size to 2016
          if we're using the bash malloc. Otherwise, let stdio handle it.

                                   8/17
                                   ----
builtins/exec.def
        - exec_builtin: make sure to initialize orig_job_control in case the
          command is not found by search_for_command. Report and fix from
          Xiami <i@f2light.com>

[bash-5.2-rc3 frozen]

                                   8/27
                                   ----
parse.y
        - parse_comsub: restore extended_glob to a local copy (local_extglob)
          only if we changed it; a safer way to do it. Fixes extglob change
          issue reported by Kerin Millar <kfm@plushkava.net>
        - cond_term: restore extended_glob to a local copy; safer than using
          global_extglob, which we will reserve for error recovery

                                   8/30
                                   ----
parse.y
        - parse_comsub: don't clear the pushed string list; we might need it to
          consume additional input to satisfy this command substitution. When
          we restore the parser state, don't restore the pushed string list in
          case we used it. From
          https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1018727
        - parse_comsub: don't modify extended_glob if parser_state includes
          PST_EXTPAT, in which case we've already set extended_glob and
          global_extglob appropriately. Only matters in compatibility mode.

                                   8/31
                                   ----
subst.c
        - parameter_brace_transform: make sure we return an error if *xform
          is '\0'. Report from Ivan Kapranov <koltiradw@yandex.ru>

                                    9/7
                                    ---
[bump version to bash-5.2-rc4]

                                    9/8
                                    ---
[bash-5.2-rc4 frozen]

                                   9/20
                                   ----
lib/readline/history.c
        - replace_history_entry: check for a NULL timestamp before trying to
          copy it. Report from nov.ondrej@gmail.com

                                   9/23
                                   ----
[bash-5.2 frozen]

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