GitLab

* src/xdisp.c (COERCE_MARKER): Remove.  All uses replaced by
Fmarker_position; this is simpler as the macro was invoked only on
markers.

* src/editfns.c (Fline_beginning_position, Fline_end_position):
Do not restrict integer arguments to fixnums.

* src/cmds.c (internal_self_insert): Avoid undefined behavior
on integer overflow by using saturated add.

* lisp/subr.el (forward-point): Rewrite in Lisp and move here ...
* src/cmds.c (Fforward_point): ... from here.  This fixes an
integer overflow bug with (forward-point most-positive-fixnum).

The number of regexps is large, they are written independently of one
another, and they frequently intersect.  Using case-sensitive matching
improves separation and performance, and is probably what everyone
have being assuming was used by compilation-mode all along.

* lisp/progmodes/compile.el (compilation-error-case-fold-search): New.
(compilation-parse-errors): Bind case-fold-search to
compilation-error-case-fold-search during matching.
* etc/NEWS: Announce.

This incorporates:
2020-03-25 getopt-posix: port __GETOPT_PREFIX to macOS
2020-03-22 acl-permissions: Improve autoconf macro
* lib/getopt-pfx-core.h, m4/acl.m4: Copy from Gnulib.

* src/filelock.c (lock_file): Pacify gcc -Wmaybe-uninitialized
after recent change to this function.

`delay-mode-hooks` cannot be tested from within `define-derived-mode`
because it's always non-nil in there, so arrange to test it before we
enter the body.

* lisp/emacs-lisp/timer-list.el (list-timers): Display both "Next"
and "Repeat" in units of seconds, for consistency.
(timer-list-mode): Add help-echo to column headers.

* lisp/dired.el (dired-mark-region): Rename choices
'exclusive' to 'file', and 'inclusive' to 'line'.
(dired-mark-if, dired-mark): Check for non-empty region explicitly
instead of using use-region-p to ignore non-nil value of
use-empty-active-region.  (Bug#39902)

* lisp/image/gravatar.el (gravatar--service-libravatar): Don't error
when failing to parse email address, just return the default URL.

* test/lisp/image/gravatar-tests.el (gravatar-build-url): Adjust
for new default gravatar url.

Now supports Libravatar and Unicornify, next to Gravatar (Bug#39965).

* lisp/image/gravatar.el (gravatar-base-url): Remove constant.
(gravatar-service-alist): List supported services.
(gravatar-service): Add user option to specify service, defaults to
Libravatar.
(gravatar--service-libravatar): New function, libravatar image host
resolver implementation.
(gravatar-build-url): Use alist gravatar-service-alist instead of
gravatar-base-url.
* etc/NEWS: Mention new gravatar service option.

* lisp/progmodes/gdb-mi.el (gdb-io-interrupt, gdb-io-quit)
(gdb-io-stop, gdb-io-eof): Send signal/EOF to the inferior
process, not to GDB.  (Bug#40210)

* lisp/svg.el (svg-create): Fix previous unconditional addition of
the xmlns:xlink declaration -- callers may already add one, and
having it twice is something most svg libraries doesn't like.

* lisp/emacs-lisp/cl-extra.el (cl-concatenate): Use defalias instead
of apply.  This is simpler and more efficient.

d66331ae (origin/emacs-27) Don't build the Gnulib 'utimens' module ...
f2351a68 Add Harfbuzz dependency
8944310d Don't signal during backtrace unrewind (Bug#40088)
8709aadd Fix a couple of problems in changelog generating functions
9ab85f08 Fix cl-concatenate (Bug#40180)
561e9fb9 Improve documentation of project.el commands
b28a9a6c Make svg images with links valid
7515252c * lisp/tab-line.el (tab-line-new-button-show): New defcustom.

# Conflicts:
#	etc/NEWS
#	nt/gnulib-cfg.mk

The following commit was skipped:

d801d1d8 Don't have exif bugging out on short strings

bed04c50 Use correct registry name for windows-1251 charset
1aa15293 ERC: Update maintainer address

* nt/gnulib-cfg.mk (OMIT_GNULIB_MODULE_utimens): Omit the
'utimens' module in the MinGW build: 'utimens' is not used by
Emacs, and 'fdutimens' is implemented in w32.c.

* admin/nt/dist-build/build-dep-zips.py: Add harfbuzz as a dependency.

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.

* src/filelock.c (lock_file): Don't query the user if the current
session already owns the lock.

* lisp/dired.el (dired-mark-if): Use dired-mark-region.
(dired-mark): Use dired-mark-region.  Fix docstring.
(dired-mark-files-regexp, dired-mark-files-containing-regexp)
(dired-mark-symlinks, dired-mark-directories)
(dired-mark-executables, dired-flag-auto-save-files)
(dired-flag-backup-files): Mention dired-mark-region in docstring.

* lisp/dired-aux.el (dired-compare-directories):
* lisp/dired-x.el (dired-mark-unmarked-files, dired-mark-sexp):
Mention dired-mark-region in docstring.

This reverts commit a6d87ea0.

* 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/net/tramp-sh.el (tramp-sh-handle-write-region): Copy to temp file
only if FILENAME exists.  (Bug#40156)

* test/lisp/net/tramp-tests.el (tramp-test10-write-region): Extend test.

* lisp/vc/ediff-init.el (ediff-H-glyph):
* lisp/vc/ediff-util.el (ediff-inferior-compare-regions)
(ediff-setup-keymap):
* lisp/vc/ediff-wind.el (ediff-control-frame-parameters)
(ediff-prefer-iconified-control-frame)
(ediff-setup-control-frame, ediff-xemacs-select-frame-hook): Remove
XEmacs compat code and declare compatibility functions obsolete.

* lisp/vc/ediff-init.el (ediff-temp-file-prefix): Redefine as
obsolete variable alias for 'temporary-file-directory'.
* lisp/vc/ediff-util.el (ediff-make-temp-file): Don't use obsolete
variable name.

* lisp/emacs-lisp/edebug.el (edebug--display-1): Remove comment
regarding an XEmacs exclusive variable.

These are not used for anything these days and can therefore be
removed.  Package developers should check the Emacs version instead.
Ref: https://lists.gnu.org/r/emacs-devel/2020-03/msg00080.html

* lisp/calendar/icalendar.el (icalendar-version):
* lisp/dframe.el (dframe-version):
* lisp/emacs-lisp/checkdoc.el (checkdoc-version):
* lisp/emulation/edt.el (edt-version):
* lisp/international/mule.el (mule-version)
(mule-version-date):
* lisp/linum.el (linum-version):
* lisp/play/bubbles.el (bubbles-version):
* lisp/speedbar.el (speedbar-version):
* lisp/textmodes/remember.el (remember-version):
* lisp/url/url-vars.el (url-version):
* lisp/woman.el (woman-version): Declare obsolete.

* lisp/emacs-lisp/checkdoc.el (checkdoc-start-section):
* lisp/speedbar.el (speedbar-mode):
* lisp/url/url-about.el (url-about-protocols):
* lisp/url/url-http.el (url-http--user-agent-default-string):
* lisp/url/url-news.el (url-news-fetch-message-id):
* lisp/woman.el (woman-menu, woman-mode): Stop using variables
declared obsolete above.

These version numbers are historical accidents and not relevant today.
Ref: https://lists.gnu.org/r/emacs-devel/2020-03/msg00080.html

* lisp/calendar/icalendar.el:
* lisp/emacs-lisp/checkdoc.el:
* lisp/hippie-exp.el:
* lisp/linum.el:
* lisp/master.el:
* lisp/progmodes/cwarn.el:
* lisp/repeat.el:
* lisp/ruler-mode.el:
* lisp/textmodes/remember.el:
* lisp/wdired.el:
* lisp/woman.el: Change "Version" header to "Old-Version".

* lisp/gnus/message.el (message-draft-headers): The Date header should
reflect when the message is sent, not when it was saved or delayed.

* lisp/svg.el (svg-create): Specify xlink namespace for svg images
(bug#40010).

Copyright-paperwork-exempt: yes

* 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.