commit bash-20160708 snapshot

CHANGES

@@ -1,3 +1,129 @@
+This document details the changes between this version, bash-4.4-beta2, and
+the previous version, bash-4.4-rc1.
+
+1.  Changes to Bash
+
+a.  Fixed a memory leak when processing ${!var[@]}.
+
+b.  Fixed a bug that caused subshells to free trap strings associated with
+    inherited signals.
+
+c.  Inheriting BASHOPTS from the environment now works to force actions
+    associated with enabling an option, instead of just marking the option
+    as enabled.
+
+d.  Fixed a bug that allowed assignments to BASH_CMDS when the shell was in
+    restricted mode.
+
+e.  Fixed a bug caused by an accidental omission of part of the original patch
+    for EXECIGNORE.
+
+e.  Prompt expansion now quotes the results of the \s, \h, and \H expansions.
+
+f.  Fixed a bug that caused parsing errors in command substitutions with
+    consecutive case statements separated by newlines.
+
+g.  Updated logic used to decide whether bash is running inside an emacs
+    terminal emulator to work with future emacs versions.
+
+h.  Fixed two extended pattern matching bugs caused by premature short-
+    circuiting.
+
+i.  Fixed a memory leak in the code that removes duplicate history entries.
+
+j.  There are a number of bug fixes to coproc, mapfile, declare, unset,
+    and assignment statements that prevent nameref variables from creating
+    and unsetting variables with invalid names.
+
+k.  Fixed a bug that caused variables to be inadvertently marked as both an
+    associative and an indexed array.
+
+l.  Fixed a bug that caused `bash -c' to not run a trap specified in the
+    command string.
+
+j.  There are a number of bug fixes to coproc, mapfile, declare, and assignment
+    statements that prevent nameref variables from overwriting or modifying
+    attributes of readonly variables.
+
+k.  Fixed a bug that caused command substitution to attempt to set the
+    terminal's process group incorrectly.
+    
+l.  Fixed a bug that could cause prompt string expansion to display error
+    messages when the `nounset' shell option is set.
+
+m.  Fixed a bug that caused "$@" to not expand to an empty string under the
+    circumstances when Posix says it should ("${@-${@-$@}}").
+
+n.  Fixed several bugs caused by referencing nameref variables whose values
+    are names of unset variables (or names that are valid for referencing
+    but not assignment), including creating variables in the temporary
+    environment.
+
+o.  Function tracing and error tracing are disabled if --debugger is supplied
+    at startup but the shell can't find the debugger start file.
+
+p.  Fixed a bug when IFS is used as the control variable in a for statement.
+
+q.  Fixed a bug with SIGINT received by a command substitution in an interactive
+    shell.
+
+r.  The checks for nameref variable self-references are more thorough.
+
+s.  Fixed several bugs with multi-line aliases.
+
+t.  Fixed `test' to handle the four-argument case where $1 == '(' and
+    $4 == ')'.
+
+u.  Fixed a bug in the expansion of $* in the cases where word splitting is
+    not performed.
+
+v.  Fixed a bug in execution of case statements where IFS includes the
+    pattern matching characters.
+
+2.  Changes to Readline
+
+a.  When refreshing the line as the result of a key sequence, Readline attempts
+    to redraw only the last line of a multiline prompt.
+
+b.  Fixed an issue that caused completion of git commands to display
+    incorrectly when using colored-completion-prefix.
+
+c.  Fixed several redisplay bugs having to do with multibyte characters and
+    invisible characters in prompt strings.
+
+3.  New Features in Bash
+
+a.  Value conversions (arithmetic expansions, case modification, etc.) now
+    happen when assigning elements of an array using compound assignment.
+
+b.  There is a new option settable in config-top.h that makes multiple
+    directory arguments to `cd' a fatal error.
+
+c.  Bash now uses mktemp() when creating internal temporary files; it produces
+    a warning at build time on many Linux systems.
+
+4.  New Features in Readline
+
+a.  The default binding for ^W in vi mode now uses word boundaries specified
+    by Posix (vi-unix-word-rubout is bindable command name).
+
+b.  rl_clear_visible_line: new application-callable function; clears all
+    screen lines occupied by the current visible readline line.
+
+c.  rl_tty_set_echoing: application-callable function that controls whether
+    or not readline thinks it is echoing terminal output.
+
+d.  Handle >| and strings of digits preceding and following redirection
+    specifications as single tokens when tokenizing the line for history
+    expansion.
+
+e.  Fixed a bug with displaying completions when the prefix display length
+    is greater than the length of the completions to be displayed.
+
+f.  The :p history modifier now applies to the entire line, so any expansion
+    specifying :p causes the line to be printed instead of expanded.
+
+------------------------------------------------------------------------------
 This document details the changes between this version, bash-4.4-rc1, and
 the previous version, bash-4.4-beta.
 

CWRU/CWRU.chlog

@@ -11163,9 +11163,10 @@ builtins/declare.def
 
 subst.c
 	- make_internal_declare: handle += append op
-	- shell_expand_word_list: when transforming assignment statement arguments
-	  to `declare', make sure to handle += append op to avoid passing invalid
-	  identifiers to declare.  Report by Grisha Levit <grishalevit@gmail.com>
+	- shell_expand_word_list: when transforming assignment statement
+	  arguments to `declare', make sure to handle += append op to avoid
+	  passing invalid identifiers to declare.  Report by Grisha Levit
+	  <grishalevit@gmail.com>
 
 				    6/1
 				    ---
@@ -11330,3 +11331,14 @@ subst.c
 subst.[ch],arrayfunc.c
 	- string_list_dollar_at: now takes a new third argument, currently
 	  reserved for future use; changed callers and declaration
+
+				    7/7
+				    ---
+[bash-4.4-beta2 frozen]
+
+				    7/9
+				    ---
+bashline.c
+	- check_redir: make sure that index is > 0 before checking previous
+	  char; fixes out of bounds read reported by Hanno Böck
+	  <hanno@hboeck.de>

NEWS

@@ -120,22 +120,33 @@ ii. inherit_errexit: a new `shopt' option that, when set, causes command
     substitutions to inherit the -e option.  By default, those subshells disable
     -e.  It's enabled as part of turning on posix mode.
 
-jj.  New prompt string: PS0.  Expanded and displayed by interactive shells after
+jj. New prompt string: PS0.  Expanded and displayed by interactive shells after
     reading a complete command but before executing it.
 
-kk.  Interactive shells now behave as if SIGTSTP/SIGTTIN/SIGTTOU are set to SIG_DFL
-    when the shell is started, so they are set to SIG_DFL in child processes.
+kk. Interactive shells now behave as if SIGTSTP/SIGTTIN/SIGTTOU are set to
+    SIG_DFL when the shell is started, so they are set to SIG_DFL in child
+    processes.
 
 ll. Posix-mode shells now allow double quotes to quote the history expansion
     character.
 
 mm. OLDPWD can be inherited from the environment if it names a directory.
 
-nn. Shells running as root no longer inherit PS4 from the environment, closing a
-    security hole involving PS4 expansion performing command substitution.
+nn. Shells running as root no longer inherit PS4 from the environment, closing
+    a security hole involving PS4 expansion performing command substitution.
 
-oo.  If executing an implicit `cd' when the `autocd' option is set, bash will now
-    invoke a function named `cd' if one exists before executing the `cd' builtin.
+oo. If executing an implicit `cd' when the `autocd' option is set, bash will
+    now invoke a function named `cd' if one exists before executing the `cd'
+    builtin.
+
+pp. Value conversions (arithmetic expansions, case modification, etc.) now
+    happen when assigning elements of an array using compound assignment.
+
+qq. There is a new option settable in config-top.h that makes multiple
+    directory arguments to `cd' a fatal error.
+
+rr. Bash now uses mktemp() when creating internal temporary files; it produces
+    a warning at build time on many Linux systems.
 
 2.  New Features in Readline
 
@@ -182,6 +193,25 @@ k.  If readline reads a history file that begins with `#' (or the value of
 l.  Readline now throws an error if it parses a key binding without a terminating
     `:' or whitespace.
 
+m.  The default binding for ^W in vi mode now uses word boundaries specified
+    by Posix (vi-unix-word-rubout is bindable command name).
+
+n.  rl_clear_visible_line: new application-callable function; clears all
+    screen lines occupied by the current visible readline line.
+
+o.  rl_tty_set_echoing: application-callable function that controls whether
+    or not readline thinks it is echoing terminal output.
+
+p.  Handle >| and strings of digits preceding and following redirection
+    specifications as single tokens when tokenizing the line for history
+    expansion.
+
+q.  Fixed a bug with displaying completions when the prefix display length
+    is greater than the length of the completions to be displayed.
+
+r.  The :p history modifier now applies to the entire line, so any expansion
+    specifying :p causes the line to be printed instead of expanded.
+
 -------------------------------------------------------------------------------
 This is a terse description of the new features added to bash-4.3 since
 the release of bash-4.2.  As always, the manual page (doc/bash.1) is

bashline.c

@@ -1279,7 +1279,7 @@ check_redir (ti)
   /* Handle the two character tokens `>&', `<&', and `>|'.
      We are not in a command position after one of these. */
   this_char = rl_line_buffer[ti];
-  prev_char = rl_line_buffer[ti - 1];
+  prev_char = (ti > 0) ? rl_line_buffer[ti - 1] : 0;
 
   if ((this_char == '&' && (prev_char == '<' || prev_char == '>')) ||
       (this_char == '|' && prev_char == '>'))

tests/extglob4.sub

@@ -1,3 +1,6 @@
+LANG=C
+LC_ALL=C
+
 : ${TMPDIR:=/tmp}
 GTDIR=$TMPDIR/extglob4-$$
 

tests/nameref.right

@@ -235,7 +235,6 @@ declare -a foo=([0]="7")
 ./nameref12.sub: line 26: declare: `42': not a valid identifier
 ./nameref12.sub: line 27: declare: x: not found
 declare -nr RO="foo"
-0 0
 /
 ./nameref12.sub: line 45: declare: `7*6': not a valid identifier
 ./nameref12.sub: line 45: declare: foo: not found

tests/nameref11.sub

@@ -11,7 +11,7 @@ f() { declare -n r; }; r=/ f ; unset r
 f() { echo $r; }; declare -n r; r=/ f ; unset -n r
 declare -n r; : ${r:=/} ; unset -n r
 declare -n r; exec {r}>/dev/null ; unset -n r
-declare -n r; coproc r { :; }; echo $r ; unset r
+declare -n r; coproc r { :; }; echo $r ; unset r ; wait
 declare -r RO=x; r=$RO; declare -n r; x=y; declare -n RO; RO=z; declare -p RO; echo "$RO"
 s=/; declare -n r=s; declare -n s; echo $r ; unset -n r ; unset -n s
 declare -n r=s; declare -n s; s=/ ; unset -n r; unset -n s

tests/nameref12.sub

@@ -36,7 +36,7 @@ unset -n r; unset r
 f() { echo $r; }
 
 declare -n r
-r=/ /usr/bin/sum < /dev/null
+r=/ ${THIS_SH} < /dev/null
 r=/ f
 
 unset -f f