backtrace_eval_unrewind is used to temporarily reverse
let-bindings (it's called with a positive argument to reverse
bindings, and then a negative argument to re-apply them) by
backtrace--locals and backtrace-eval. For the SPECPDL_LET_DEFAULT and
SPECPDL_LET_LOCAL cases (which occur for let-bindings on buffer-local
variables), the code calls Fdefault_value and Fbuffer_local_value on
the symbol.
For symbols which are unbound at top-level, the first (with positive
argument) call to backtrace_eval_unrewind will set the symbol's value
to unbound (putting the current value in the specpdl's "old value"
slot). On the second (with negative argument) call,
backtrace_eval_unrewind attempts to retrieve the symbol's value with
Fdefault_value or Fbuffer_local_value, but that raises a void-variable
signal. This interrupts the restoration of the let-bindings, so any
other variables more recent on the stack will now have the wrong
value.
* src/data.c (default_value): Make non-static.
* src/lisp.h: Declare it.
* src/eval.c (backtrace_eval_unrewind): Replace the calls to
Fdefault_value and Fbuffer_local_value with default_value and
buffer_local_value, respectively. The latter do exactly the same as
the former, except if the symbol's value is Qunbound they just return
it instead of signaling void-variable.
* lisp/vc/diff-mode.el (diff-add-log-current-defuns): If there is a
scan-error when calling end-of-defun, go to end of hunk. This can
easily happen since we are calling end-of-defun on a partial code
fragment from a diff.
* lisp/vc/log-edit.el (log-edit-generate-changelog-from-diff): Bind
display-buffer-overriding-action around the log-edit-show-diff call
only. Otherwise, it can affect, for example, debugger windows
triggered by the diff-add-log-current-defuns call.
* lisp/emacs-lisp/cl-extra.el (cl-concatenate): Use apply, to avoid
adding extra nesting of args.
* test/lisp/emacs-lisp/cl-extra-tests.el (cl-concatenate): New test.
* lisp/progmodes/project.el (project-find-regexp): Require 'grep'
to be able to call 'grep-read-files'.
(project-search, project-query-replace-regexp): Doc fixes.
* doc/emacs/maintaining.texi (Projects): New section.
* doc/emacs/emacs.texi (Top): Add "Projects" to the detailed menu.
* lisp/tab-line.el (tab-line-format-template): Use tab-line-new-button-show.
(tab-line-new-tab-choice): Remove choice 'nil' with "No button".
(tab-line-separator): Add docstring.
* lisp/image/exif.el (exif--direct-ascii-value): New function
(bug#40127).
(exif--parse-directory): Use it to get the correct values for
in-directory (i.e., shorter than 4 octets) strings.
This protects against tools that mangle newline characters in text
files.
* test/lisp/electric-tests.el (electric-pair-mode-newline-between-parens)
(electric-layout-mode-newline-between-parens-without-e-p-m)
(electric-layout-mode-newline-between-parens-without-e-p-m-2): Escape
carriage return characters.
This is an updated version of the patch by Dmitry Antipov
<dmantipov@yandex.ru> in
<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=23386#43>.
Fixes Bug#23386
* src/dispextern.h (struct redisplay_interface): New member
default_font_parameter.
* src/xterm.h: Add prototype for x_default_font_parameter.
* src/xterm.c (x_redisplay_interface): Initialize
default_font_parameter member.
* src/xfns.c (x_default_font_parameter): Make non-static.
* src/w32term.h: Add prototype for w32_default_font_parameter
* src/w32fns.c (w32_default_font_parameter): Make non-static.
* src/w32term.c (w32_redisplay_interface): Initialize
default_font_parameter member.
* src/nsterm.m (ns_redisplay_interface): Add dummy
ns_default_font_parameter (there is currently only one possible font
backend on macOS). Initialize default_font_parameter member.
* src/frame.c (gui_set_font_backend): Recalculate default font using
RIF default_font_parameter to avoid crash when changing font backend.
* lisp/tab-line.el (tab-line-format): Use buffer-name in the cache key
instead of just buffer object to invalidate the cache on buffer renaming.
(tab-line-format-template): Always leave the separator after the last tab
like tab-bar.el already does.
* lisp/image/image-converter.el (image-converter--probe): Match
a possible additional second column in some ImageMagick versions
of "convert -list format".
* admin/unidata/BidiBrackets.txt:
* admin/unidata/BidiMirroring.txt:
* admin/unidata/Blocks.txt:
* admin/unidata/NormalizationTest.txt:
* admin/unidata/SpecialCasing.txt:
* admin/unidata/UnicodeData.txt:
* admin/unidata/copyright.html:
* test/manual/BidiCharacterTest.txt: Updated files imported from
Unicode v13.0.
* admin/unidata/blocks.awk: Add "Symbols for Legacy Computing" to
known aliases.
* lisp/international/fontset.el (script-representative-chars)
(setup-default-fontset): Add new scripts.
* lisp/international/characters.el: Set syntax for Symbols for
Legacy Computing characters. Update setting of char-width-table.
* lisp/international/mule-cmds.el (ucs-names): Update ranges of
characters for which we want names in 'ucs-names'.
* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--failing-lines-part1)
(ucs-normalize-tests--failing-lines-part2): Update according to
'ucs-normalize-check-failing-lines'.
* lisp/cedet/semantic/wisent/comp.el (wisent-total-conflicts):
There may not be a current source file. In that case, don't try
to keep track of the number of expected conflicts (bug#39911).
* lisp/emacs-lisp/package.el (package-menu-toggle-hiding): Add
reference to 'package-menu-hidden-regexps'.
* lisp/emacs-lisp/package.el (package-menu-hide-package): Improve
docstring to say that hiding is saved in a user option. Fix a
typo. (Bug#39436)
* src/ftfont.c (fc_charset_table): Fix the value of the big-5
representative codepoint. Reported by Brian Schack
<bschack-cocoa@usa.net>. (Bug#40057)
* src/macfont.m (cf_charset_table): Adjust the comment.
* doc/emacs/frames.texi (Mouse Commands): More detailed
description of how tilting the mouse-wheel works.
* lisp/mwheel.el (mouse-wheel-tilt-scroll)
(mouse-wheel-flip-direction): Fix the wording of doc strings.
(Bug#39979)
* lisp/tab-bar.el (tab-bar-mode): Check for non-nil
tab-bar-new-button and tab-bar-close-button.
(tab-bar-new-button-show): New defcustom.
(tab-bar-make-keymap-1): Check for tab-bar-new-button-show.
(tab-bar-separator): Add docstring.
Don't re-use an existing `pending-undo-list` even if (eq last-command 'undo)
since there might have been changes to the buffer since that `undo` command
and the `pending-undo-list` can hence be invalid for the current
buffer contents.
Fixes (Bug#39761) by making cl-extra dependent on seq rather than
vice versa.
* lisp/emacs-lisp/seq.el (seq-concatenate): Move cl-concatenate's
code here instead of calling it.
* lisp/emacs-lisp/cl-extra.el (cl-concatenate): Use cl-concatenate.
Copyright-paperwork-exempt: yes
* doc/emacs/macos.texi (Mac / GNUstep Customization): Document some
more of the ns- variables and remove incorrect font back-end
information.
* etc/NEWS: Update the documentation status of macOS news entries.
* lisp/minibuffer.el (minibuffer--require-match): New variable.
(completing-read-default): Bind it to the REQUIRE-MATCH value.
(minibuffer-force-complete-and-exit): Consult it to allow input
with no matches when a match is not required (bug#38992).
* lisp/icomplete.el (icomplete-exhibit): Use it to render the
correct parens around matches.
