changes

android-w.song.android.widget

g.  Fixed a bug that caused key sequences of two characters to not be
    recognized when a longer sequence identical in the first two characters
    was bound.

h.  Fixed a bug that caused history expansion to be attempted on $'...'
    single-quoted strings.

i.  Fixed a bug that caused incorrect redisplay when the prompt contained
    multibyte characters in an `invisible' sequence bracketed by \[ and
    \].

j.  Fixed a bug that caused history expansion to short-circuit after
    encountering a multibyte character.

3.  New Features in Bash

a.  Here-documents within $(...) command substitutions may once more be
    delimited by the closing right paren, instead of requiring a newline.

b.  Bash's file status checks (executable, readable, etc.) now take file
    system ACLs into account on file systems that support them.

c.  Bash now passes environment variables with names that are not valid
    shell variable names through into the environment passed to child
    processes.

d.  The `execute-unix-command' readline function now attempts to clear and
    reuse the current line rather than move to a new one after the command
    executes.

e.  `printf -v' can now assign values to array indices.

f.  New `complete -E' and `compopt -E' options that work on the "empty"
    completion: completion attempted on an empty command line.

g.  New complete/compgen/compopt -D option to define a `default' completion:
    a completion to be invoked on command for which no completion has been
    defined.  If this function returns 124, programmable completion is
    attempted again, allowing a user to dynamically build a set of completions
    as completion is attempted by having the default completion function
    install individual completion functions each time it is invoked.

h.  When displaying associative arrays, subscripts are now quoted.

i.  Changes to dabbrev-expand to make it more `emacs-like': no space appended
    after matches, completions are not sorted, and most recent history entries
    are presented first.

j.  The [[ and (( commands are now subject to the setting of `set -e' and the
    ERR trap.

k.  The source/. builtin now removes NUL bytes from the file before attempting
    to parse commands.

l.  There is a new configuration option (in config-top.h) that forces bash to
    forward all history entries to syslog.

m.  A new variable $BASHOPTS to export shell options settable using `shopt' to
    child processes.

n.  There is a new confgure option that forces the extglob option to be
    enabled by default.

o.  New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace
    output to that file descriptor.

p.  If the optional left-hand-side of a redirection is of the form {var}, the
    shell assigns the file descriptor used to $var or uses $var as the file
    descriptor to move or close, depending on the redirection operator.

q.  The < and > operators to the [[ conditional command now do string
    comparison according to the current locale.

r.  Programmable completion now uses the completion for `b' instead of `a'
    when completion is attempted on a line like: a $(b c.

s.  Force extglob on temporarily when parsing the pattern argument to
    the == and != operators to the [[ command, for compatibility.

t.  Changed the behavior of interrupting the wait builtin when a SIGCHLD is
    received and a trap on SIGCHLD is set to be Posix-mode only.

u.  The read builtin has a new `-N nchars' option, which reads exactly NCHARS
    characters, ignoring delimiters like newline.

4.  New Features in Readline

a.  New bindable function: menu-complete-backward.

b.  In the vi insertion keymap, C-n is now bound to menu-complete by default,
    and C-p to menu-complete-backward.

c.  When in vi command mode, repeatedly hitting ESC now does nothing, even
    when ESC introduces a bound key sequence.  This is closer to how
    historical vi behaves.

d.  New bindable function: skip-csi-sequence.  Can be used as a default to
    consume key sequences generated by keys like Home and End without having
    to bind all keys.

e.  New application-settable function: rl_filename_rewrite_hook.  Can be used
    to rewite or modify filenames read from the file system before they are
    compared to the word to be completed.

f.  New bindable variable: skip-completed-text, active when completing in the
    middle of a word.  If enabled, it means that characters in the completion
    that match characters in the remainder of the word are "skipped" rather
    than inserted into the line.

g.  The pre-readline-6.0 version of menu completion is available as
    "old-menu-complete" for users who do not like the readline-6.0 version.

h.  New bindable variable: echo-control-characters.  If enabled, and the
    tty ECHOCTL bit is set, controls the echoing of characters corresponding
    to keyboard-generated signals.

i.  New bindable variable: enable-meta-key.  Controls whether or not readline
    sends the smm/rmm sequences if the terminal indicates it has a meta key
    that enables eight-bit characters.

------------------------------------------------------------------------------
This document details the changes between this version, bash-4.0-release,
and the previous version, bash-4.0-rc1.

1.  Changes to Bash

a.  Changed the message printed when setlocale(3) fails to only include the
    strerror error text if the call changes errno.

b.  Changed trap command execution to reset the line number before running a
    trap (except DEBUG and RETURN traps).

c.  Fixed behavior of case-modifiying word expansions to not work on
    individual words within a variable's value.

d.  Fixed a bug that caused mapfile to not be interruptible when run in an
    interactive shell.

e.  Fixed a bug that caused mapfile to not run callbacks for the first line
    read.

f.  Fixed a bug that caused mapfile to not honor EOF typed in an interactive
    shell.

g.  Fixed the coprocess reaping code to not run straight from a signal handler.

h.  Fixed a bug that caused printf -b to ignore the first % conversion specifier
    in the format string on 64-bit systems.

i.  Fixed a bug that caused incorrect word splitting when `:', `=', or `~'
    appeared in $IFS.

j.  Fixed a bug that caused data corruption in the programmable completion code
    when a shell function called from a completion aborted execution.

k.  Fixed a bug that caused the CPU usage reported by the `time' builtin to be
    capped at 100%.

l.  Changed behavior of shell when -e option is in effect to reflect consensus
    of Posix shell standardization working group.

m.  Fixed a bug introduced in bash-4.0-alpha that caused redirections to not
    be displayed by `type' or `declare' when appearing in functions under
    certain circumstances.

2.  Changes to Readline

a.  Fixed a bug that caused !(...) extended glob patterns to inhibit later
    history expansion.

b.  Reworked the signal handling to avoid calling disallowed functions from a
    signal handler.

3.  New Features in Bash

a.  `readarray' is now a synonym for `mapfile'.
------------------------------------------------------------------------------
This document details the changes between this version, bash-4.0-rc1,
and the previous version, bash-4.0-beta2.

1.  Changes to Bash

a.  Fixed a bug that caused parsing errors when a $()-style command
    substitution was follwed immediately by a quoted newline.

b.  Fixed a bug that caused extended shell globbing patterns beginning with
    `*(' to not work when used with pattern substitution word expansions.
 
------------------------------------------------------------------------------
This document details the changes between this version, bash-4.0-beta2,
and the previous version, bash-4.0-beta.

1.  Changes to Bash

a.  Fixed a bug that caused failed word expansions to set $? but not
    PIPESTATUS.

b.  Changed filename completion to quote the tilde in a filename with a
    leading tilde that exists in the current directory.

c.  Fixed a bug that caused a file descriptor leak when performing
    redirections attached to a compound command.

d.  Fixed a bug that caused expansions of $@ and $* to not exit the shell if
    the -u option was enabled and there were no posititional parameters.

e.  Fixed a bug that resulted in bash not terminating immediately if a
    terminating signal was received while performing output.

f.  Fixed a bug that caused the shell to crash after creating 256 process
    substitutions during word completion.

2.  Changes to Readline

a.  Fixed a bug that caused redisplay errors when using prompts with invisible
    characters and numeric arguments to a command in a multibyte locale.

b.  Fixed a bug that caused redisplay errors when using prompts with invisible
    characters spanning more than two physical screen lines.

------------------------------------------------------------------------------
This document details the changes between this version, bash-4.0-beta,
and the previous version, bash-4.0-alpha.

1.  Changes to Bash

a.  Fixed a typo that caused a variable to be used before initialization
    while parsing Posix-style command substitutions.

b.  Fixed a bug that caused stray ^? when the expansion of a parameter used
    as part of a pattern removal expansion is empty, but part of a non-
    empty string.

c.  Fixed a bug that could cause strings not converted to numbers by strtol
    to be treated as if the conversion had been successful.

d.  The `return' builtin now accepts no options and requires a `--' before
    a negative return value, as Posix requires.

e.  Fixed a bug that caused local variables to be created with the empty
    string for a value rather than no value.

f.  Changed behavior so the shell now acts as if it received an interrupt
    when a pipeline is killed by SIGINT while executing a list.

g.  Fixed a bug that caused `declare var' and `typeset var' to initialize
    `var' to the empty string.

h.  Changed `bind' builtin to print a warning but proceed if invoked when
    line editing is not active.

i.  Fixed a bug that caused the shell to exit when the `errexit' option is
    set and a command in a pipeline returns a non-zero exit status.

j.  Fixed a bug that caused the shell to not run the exit trap in a command
    run with `bash -c' under some circumstances.

k.  Fixed a bug that caused parser errors to occasionally not set $? when
    running commands with `eval'.

l.  Fixed a bug that caused stray control characters when evaluating compound
    array assignments containing $'\x7f' escapes.

m.  Fixed a bug that caused redirections involving file descriptor 10 as the
    target to behave incorrectly.

n.  Fixed a bug that could cause memory to be freed multiple times when
    assigning to COMP_WORDBREAKS.

o.  Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS
    was unset.

2.  Changes to Readline

3.  New Features in Bash

a.  A value of 0 for the -t option to `read' now returns success if there is
    input available to be read from the specified file descriptor.

b.  CDPATH and GLOBIGNORE are ignored when the shell is running in privileged
    mode.

c.  New bindable readline functions shell-forward-word and shell-backward-word,
    which move forward and backward words delimited by shell metacharacters
    and honor shell quoting.

d.  New bindable readline functions shell-backward-kill-word and shell-kill-word
    which kill words backward and forward, but use the same word boundaries
    as shell-forward-word and shell-backward-word.

4.  New Features in Readline

a.  If the kernel supports it, readline displays special characters
    corresponding to a keyboard-generated signal when the signal is received.

------------------------------------------------------------------------------
This document details the changes between this version, bash-4.0-alpha,
and the previous version, bash-3.2-release.

1.  Changes to Bash

a.  Fixed several bugs in old-style `` command substitution parsing, including
    comment parsing and quoted string handling.

b.  Fixed problems parsing arguments to the [[ command's =~ regular expression
    matching operator:  metacharacter and whitespace parsing.

c.  Fixed a bug that caused the shell to inappropriately reuse high-numbered
    file descriptors it used internally.

d.  Fixed a bug in pattern replacement word expansions that caused a `/' as
    the first character of an expanded pattern to be mistaken for a global
    replacement specifier.

e.  Fixed several problems with the asprintf and snprintf replacement functions
    that caused hangs and crashes.

f.  Fixed a bug in the calculation of the current and previous job that caused