…g#27564)

* lisp/ffap.el (find-file-at-point): Mention `ffap-url-unwrap-local'
and `ffap-url-unwrap-remote'.

(c-parse-quotes-before-change, c-parse-quotes-after-change):
Remove unused vars.

(c-guess-view-reorder-offsets-alist-in-style): Remove redundantly bound
and computed variable `guessed-syntactic-symbols'.

(c-syntactic-context): Declare as dynbound.
(c-beginning-of-defun, c-end-of-defun): Remove unused var `start'.

(c-beginning-of-statement-1, c-guess-basic-syntax):
Remove unused var c-in-literal-cache.
(c-debug-sws-msg): Silence byte-compiler, even if we don't use the arg.
(c-append-to-state-cache): Remove unused var `bra+1s'.
(c-remove-stale-state-cache): Remove unused var `pps-point-state'.
(c-invalidate-state-cache-1): Remove unused var `pa'.
(c-forward-decl-or-cast-1): Change comments so they don't look like
outline headers.
(c-restricted-<>-arglists, c-parse-and-markup-<>-arglists):
Declare before first use.
(c-forward-decl-or-cast-1): Remove unused var `backup-kwd-sym'.
(c-backward-over-enum-header): Remove unused var `up-sexp-pos'.

(c-primary-expr-regexp): Remove unused vars ambiguous-prefix-ops and
unambiguous-prefix-ops.

... before first use

* lisp/net/tramp.el (tramp-file-name-handler): Don't trigger timers.

* test/lisp/net/tramp-tests.el
(tramp-test36-asynchronous-requests): Trigger timers.
(tramp-test37-recursive-load, tramp-test38-remote-load-path):
Set `default-directory' to a trustworthy value.

* lisp/progmodes/bug-reference.el (bug-reference-bug-regexp):
Autoload safety property.  (Bug#27481)

I have some further changes in mind that would also need to
disable the -Woverride-init warnings.  In practice these warnings
seem to be more trouble than they’re worth, so disable them in the
cc command line.
* configure.ac: Disable -Woverride-init here ...
* src/bytecode.c: ... rather than here.

This makes the code a bit smaller and presumably faster, as
it substitutes a single lookup for conditional jumps.
* src/character.c (hexdigit): New constant.
(syms_of_character) [HEXDIGIT_IS_CONST]: Initialize it.
* src/character.h (HEXDIGIT_CONST, HEXDIGIT_IS_CONST): New macros.
(hexdigit): New decl.
(char_hexdigit): New inline function.
* src/charset.c: Do not include c-ctype.h.
* src/charset.c (read_hex):
* src/editfns.c (styled_format):
* src/image.c (xbm_scan):
* src/lread.c (read_escape):
* src/regex.c (ISXDIGIT) [emacs]:
Use char_hexdigit insted of doing it by hand.

* src/image.c (XBM_TK_OVERFLOW): New constant.
(xbm_scan): Check for integer overflow instead of relying on
undefined behavior.  Check that octal digits are actually octal.

* lisp/newcomment.el (comment-choose-indent): Interpret a cons of two
integers as indicating a range of acceptable indentation.
(comment-indent): Don't apply `comment-inline-offset',
`comment-choose-indent' already does that.
(comment-indent-function):
* doc/emacs/programs.texi (Options for Comments): Document new
acceptable return values.
* etc/NEWS: Announce it.

…g#19740)

* lisp/emacs-lisp/lisp-mode.el (lisp-comment-indent): If current
line's code ends in open paren, set comment indentation exactly to
column following it.
(lisp-mode-variables): Set `comment-indent-function' to
`lisp-comment-indent'.

* lisp/org/org-table.el (org-table-sort-lines):
Fix misspelling in prompt.
* lisp/org/ox-ascii.el (org-ascii--describe-datum):
Fix misspelling in call to org-element-lineage.

* lisp/emacs-lisp/lisp-mode.el (lisp-comment-indent): Only check for
open paren if we're looking at multiple comment characters.
* test/lisp/emacs-lisp/lisp-mode-tests.el (lisp-comment-indent-1)
(lisp-comment-indent-2): New tests.

* src/xdisp.c (display_count_lines_logically): New function,
counts line numbers disregarding narrowing.  Suggested by Andy
Moreton <andrewjmoreton@gmail.com>.
(maybe_produce_line_number): Call display_count_lines_logically
instead of display_count_lines.  Adapt BEGV, ZV, etc. to
display-line-numbers-widen.
(syms_of_xdisp) <display-line-numbers-widen>: New buffer-local
variable.

* lisp/cus-start.el (standard): Provide a customization form for
display-line-numbers-widen.
* lisp/frame.el: Add display-line-numbers-widen,
display-line-numbers-current-absolute, and
display-line-number-width to the list of variables that should
trigger redisplay of the current buffer.

* doc/emacs/display.texi (Display Custom): Document
display-line-numbers-widen.

* test/lisp/epg-tests.el (with-epg-tests): Ignore REQUIRE-PASSPHRASE
parameter, since we supply the passphrase via pinentry-program for all
GPG versions (as of 2017-02-28 "Fix epg-tests with dummy-pinentry
program (Bug#23619)").
(epg-tests-program-alist-for-passphrase-callback): Remove.

More followup to Karl Fogel's commit a84da83.
* lisp/dired-aux.el (dired-add-entry, dired-subdir-hidden-p):
* lisp/dired-x.el (dired-mark-unmarked-files, dired-mark-sexp):
* lisp/help-fns.el (doc-file-to-man, doc-file-to-info):
* lisp/proced.el (proced-toggle-marks):
* lisp/progmodes/f90.el (f90-indent-line):
* lisp/ses.el (ses-load):
* lisp/tar-mode.el (tar-expunge): Replace instances of looking-at with
char comparisons using following-char.

Vwindow_text_change_functions had been provided for implementing
line numbers but apparently was never functional or in use.

* src/xdisp.c (redisplay_window): Remove handling of
Vwindow_text_change_functions.
(syms_of_xdisp): Remove Qwindow_text_change_functions.
(Vwindow_text_change_functions): Remove variable.
* doc/lispref/hooks.texi (Standard Hooks): Remove entry for
`window-text-change-functions'.

* src/indent.c (line_number_display_width): New function,
refactored from line-number width calculations in vertical-motion.
(Fvertical_motion): Call line_number_display_width when the width
of line-number display is needed.
(Fline_number_display_width): New defun.
(syms_of_indent): Defsubr it.

* doc/lispref/display.texi (Size of Displayed Text): Document
line-number-display-width.

* etc/NEWS: Mention line-number-display-width.

* lisp/simple.el (last--line-number-width): New internal variable.
(line-move-visual): Use it to adjust temporary-goal-column when
line-number display changes its width.

* src/indent.c (Fline_number_display_width): Don't add 2 to the
number of columns we return, to make this consistent with
display-line-number-width.

* lisp/calendar/todo-mode.el (todo-toggle-mark-item): Calculate
current category only once.
(todo-mark-category): Update number of marked items to avoid
spurious duplication in todo-categories-with-marks alist and
corruption of the todo-categories alist.  Handle empty line
when there are no todo items and done items are shown.
(todo-set-item-priority): Make noop if called from
todo-raise-item-priority or todo-lower-item-priority when
point is on a done todo item or an empty line.
(todo-move-item): Use markers instead of integer positions to
correctly handle deleting the now moved items from the source
category (without markers an infinite loop arises when moving
marked item to a preceding category).
(todo-unarchive-items): Put point on the (first) restored done
item, instead of leaving it at the end of the done items
separator string.
(todo-revert-buffer): Ensure buffer remains read-only after
reverting.

* lisp/calendar/todo-mode.el (todo--item-headers-hidden): New variable.
(todo-toggle-item-header): Use it.  Make this command a noop
if the file has no items.
(todo-move-item, todo-item-done): Instead of concatenating the
items to move into one string, make a list of them to
facilitate handling hidden headers.  Adjust insertion accordingly.
(todo-archive-done-item): Handle hidden headers in archive file.
(todo-unarchive-items): Handle hidden headers in todo file.
(todo-backward-item): Use todo--item-headers-hidden and handle
moving backward work when item date-time headers are hidden.
(todo-remove-item): Delete date-time header overlay.
(todo-get-overlay, todo-insert-with-overlays): Make them work
with hidden date-time headers.
(todo-modes-set-2): Make todo--item-headers-hidden buffer local.

* test/lisp/calendar/todo-mode-tests.el (with-todo-test):
Declare an Edebug spec.  Restore pre-test-run state of test files.
(todo-test--show, todo-test--move-item)
(todo-test--insert-item): New functions.
(todo-test-get-archive): Remove, as subsumed by
todo-test--show.  Adjust all callers.
(todo-test--is-current-buffer): Rename from
todo-test-is-current-buffer and adjust uses.
(todo-test-item-highlighting): Use todo-test--show.
(todo-test-revert-buffer01, todo-test-revert-buffer02)
(todo-test-raise-lower-priority)
(todo-test-todo-mark-unmark-category, todo-test-move-item01)
(todo-test-move-item02, todo-test-move-item03)
(todo-test-move-item04, todo-test-move-item05)
(todo-test-toggle-item-header01)
(todo-test-toggle-item-header02)
(todo-test-toggle-item-header03)
(todo-test-toggle-item-header04)
(todo-test-toggle-item-header05)
(todo-test-toggle-item-header06)
(todo-test-toggle-item-header07): New tests.

* test/lisp/calendar/todo-mode-resources/todo-test-1.toda:
* test/lisp/calendar/todo-mode-resources/todo-test-1.todo:
Modify to accommodate new tests.

* src/lread.c (readchar, read_emacs_mule_char): Fix off-by-one
error when reading an encoding error from a file, e.g., a symbol
in an .elc file whose name is "\360\220\200\360".

* src/charset.c (read_hex): New args LOOKAHEAD and TERMINATOR,
replacing the old EOF.  All callers changed.  This avoids the
need to call ungetc.

* src/lread.c (infile): New variable, replacing ...
(instream): ... this.  All uses changed.
(readbyte_from_stdio): New function, which deals with lookahead.
(readbyte_from_file, Fget_file_char): Use it.
(Fget_file_char): When misused, signal an error instead of
relying on undefined behavior.
(close_infile_unwind): New function.
(Fload): Use it.
(readevalloop): 2nd arg is now struct infile *, not FILE *.
All callers changed.
(read1): Handle lookahead when copying doc strings with
encoding errors.

This merges branch 'line-numbers'.
* src/buffer.c (disable_line_numbers_overlay_at_eob): New
function.
* src/lisp.h (disable_line_numbers_overlay_at_eob): Add prototype.
* src/dispextern.h (struct it): New members pt_lnum, lnum,
lnum_bytepos, lnum_width, and lnum_pixel_width.
* src/indent.c (line_number_display_width): New function,
refactored from line-number width calculations in vertical-motion.
(Fvertical_motion): Call line_number_display_width when the width
of line-number display is needed.
(Fline_number_display_width): New defun.
(syms_of_indent): Defsubr it.
* src/indent.c (Fvertical_motion): Help C-n/C-p estimate correctly
the width used up by line numbers by looking near the window-start
point.  If window-start is outside of the accessible portion,
temporarily widen the buffer.
* src/term.c (produce_glyphs): Adjust tab stops for the horizontal
space taken by the line-number display.
* src/xdisp.c (display_count_lines_logically)
(display_count_lines_visually, maybe_produce_line_number)
(should_produce_line_number, row_text_area_empty): New functions.
(try_window_reusing_current_matrix): Don't use this method when
display-line-numbers is in effect.
(try_window_id, try_cursor_movement): Disable these optimizations
when the line-number-current-line face is different from
line-number face and for relative line numbers.
(try_window_id, redisplay_window, try_cursor_movement): For
visual line-number display, disable the same redisplay
optimizations as for relative.
(x_produce_glyphs): Adjust tab stops for the horizontal
space taken by the line-number display.
(hscroll_window_tree): Adjust hscroll calculations to line-number
display.
(DISP_INFINITY): Renamed from INFINITY to avoid clashes with
math.h; all users changed.
(set_cursor_from_row): Fix calculation of cursor X coordinate in
R2L rows with display-produced glyphs at the beginning.
(display_line): Use should_produce_line_number to determine
whether a line number should be produced for each glyph row, and
maybe_produce_line_number to produce line numbers.
Don't display line numbers in the minibuffer and in tooltip
frames.
Call row_text_area_empty to verify that a glyph
row's text area is devoid of any glyphs that came from a buffer or
a string.  This fixes a bug with empty-lines indication
disappearing when line numbers or line-prefix are displayed.
(syms_of_xdisp) <display-line-numbers, display-line-numbers-widen>
<display-line-number-width>: New buffer-local variables.
<display-line-numbers-current-absolute>: New variable.

* lisp/cus-start.el (standard): Provide customization forms for
display-line-numbers and its sub-features.
* lisp/faces.el (line-number, line-number-current-line): New faces.
* lisp/frame.el: Add display-line-numbers, display-line-numbers-widen,
display-line-numbers-current-absolute, and
display-line-number-width to the list of variables that should
trigger redisplay of the current buffer.
* lisp/menu-bar.el (menu-bar-showhide-menu): Add menu-bar item to
turn display-line-numbers on and off.
(toggle-display-line-numbers): New function.
* lisp/simple.el (last--line-number-width): New internal variable.
(line-move-visual): Use it to adjust temporary-goal-column when
line-number display changes its width.

* doc/emacs/basic.texi (Position Info): Add cross-reference to
"Display Custom", for line-number display.
* doc/emacs/custom.texi (Init Rebinding):
* doc/emacs/modes.texi (Minor Modes): Remove references to
linum-mode.
* doc/emacs/display.texi (Display Custom): Describe the
line-number display.
* doc/lispref/display.texi (Size of Displayed Text): Document
line-number-display-width.

* etc/NEWS: Document display-line-numbers and its customizations.

* lisp/frame.el: Explain how to test whether a variable needs to
be added to the list of those which are watched for buffer
redisplay.

* src/xdisp.c (dump_glyph, dump_glyph_row, Fdump_glyph_matrix):
Use pD directives for ptrdiff_t values instead of pI, to avoid
compilation warnings on 64-bit hosts.  (Bug#27597)

* lib-src/etags.c (get_lispy_tag): New function.
(L_getit, Scheme_functions): Use get_lispy_tag (Bug#5624).
* test/manual/etags/CTAGS.good:
* test/manual/etags/ETAGS.good_1:
* test/manual/etags/ETAGS.good_2:
* test/manual/etags/ETAGS.good_3:
* test/manual/etags/ETAGS.good_4:
* test/manual/etags/ETAGS.good_5:
* test/manual/etags/ETAGS.good_6:
* test/manual/etags/Makefile:
* test/manual/etags/el-src/TAGTEST.EL: Update tests.
* test/manual/etags/scm-src/test.scm: New tests for Scheme.

* admin/notes/unicode:
* admin/unidata/README:
* admin/unidata/BidiBrackets.txt:
* admin/unidata/BidiMirroring.txt:
* admin/unidata/Blocks.txt:
* admin/unidata/IVD_Sequences.txt:
* admin/unidata/NormalizationTest.txt:
* admin/unidata/SpecialCasing.txt:
* admin/unidata/UnicodeData.txt:
* lisp/international/characters.el:
* lisp/international/fontset.el (script-representative-chars):
* lisp/international/mule-cmds.el (ucs-names): Update per Unicode 10.0.

* lisp/menu-bar.el (menu-bar-showhide-menu): Capitalize menu item
for display-line-numbers.  Suggested by Martin Rudalics
<rudalics@gmx.at>.

It's technically possible to write a user pointer finalizer that calls
into Emacs module functions.  This would be disastrous because it
would allow arbitrary Lisp code to run during garbage collection.
Therefore extend the module assertions to check for this case.

* src/emacs-module.c (module_assert_thread): Also check whether a
garbage collection is in progress.

* test/data/emacs-module/mod-test.c (invalid_finalizer)
(Fmod_test_invalid_finalizer): New test module functions.
(emacs_module_init): Register new test function.

* test/src/emacs-module-tests.el (module--test-assertion)
(module--with-temp-directory): New helper macros.
(module--test-assertions--load-non-live-object): Rename existing
unit test, use helper macros.
(module--test-assertions--call-emacs-from-gc): New unit test.

* test/lisp/international/ucs-normalize-tests.el: Remove incorrect
commentary describing a manual procedure for producing the updated
failing lines, it did not actually work.  Replace it with pointer to
new function which prints the updated values.
(ucs-normalize-tests--rule1-holds-p): Renamed from
ucs-normalize-tests--invariants-hold-p.
(ucs-normalize-tests--rule2-holds-p): Renamed from
ucs-normalize-tests--invariants-rule2-hold-p.
(ucs-normalize-tests--rule1-failing-for-partX): Renamed from
ucs-normalize-tests--invariants-failing-for-part.
(ucs-normalize-tests--rule1-failing-for-lines): Renamed from
ucs-normalize-tests--invariants-failing-for-lines.
(ucs-normalize-tests--part2-rule1-failed-lines): New variable.
(ucs-normalize-part2): Set it.
(ucs-normalize-part1): Always run through to end of test before
checking for failures.
(ucs-normalize-tests--insert-failing-lines)
(ucs-normalize-check-failing-lines): New functions, used to update
the *--failing-lines-part* variables.

* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--failing-lines-part2): Update for new
admin/unidata/NormalizationTest.txt version.

Brings the the time for `ucs-normalize-part1' from 200s down to 130s.
* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--parse-column): Use character instead of string
of length 1 for terminator.  Convert return value into string since
all callers need that form anyway.
(ucs-normalize-tests--normalization-equal-p): Rename from
ucs-normalize-tests--normalize.  Use dedicated buffer instead of
messing with narrowing.  Take string to compare against and insert it
into buffer so that compare-buffer-substrings can be used instead of
allocating a new string from buffer contents.
(ucs-normalize-tests--normalization-chareq-p): New macro, specialized
for comparing single character.
(ucs-normalize-tests--rule1-holds-p)
(ucs-normalize-tests--rule2-holds-p): Turn into defsubst.
(ucs-normalize-tests--rule1-failing-for-partX): Use `eq' instead of
`='.

Adjust wheatgrass to use underline for enabled/disabled breakpoints

* src/keyboard.c: (internal_border_parts): Define only
when HAVE_WINDOW_SYSTEM is enabled.  (Bug#27615)

* src/xdisp.c (maybe_produce_line_number): Speed up line counting
using values cached by mode-line display of line numbers.
(Bug#27622)

* doc/emacs/maintaining.texi (Version Control): Add a "VC" index
entry.  (Bug#27627)

* lisp/files.el (auto-save-visited-file-name): Avoid obsoletion
warning due to its use in auto-save-visited-mode.

* src/w32proc.c (w32_executable_type): Don't assume that the
import directory in a DLL will always be non-NULL.  (Bug#27527)

Copyright-paperwork-exempt: yes

* lisp/electric.el (electric-quote-post-self-insert-function): Remove
local variable 'start', which was misnamed and only used once.

* lisp/electric.el (electric-quote-post-self-insert-function): Remove
pointless form.

Markdown sets both 'comment-start' and 'comment-use-syntax' to non-nil
values.  Therefore 'electric-quote-mode' recognized it as a
programming mode.  Fix this by first checking whether the current
major mode is derived from 'text-mode'.

* lisp/electric.el (electric-quote-post-self-insert-function): Treat
'text-mode' as stronger signal than comment syntax.

* test/lisp/electric-tests.el (electric-quote-markdown-in-text)
(electric-quote-markdown-in-code): Adapt unit tests.

* src/emacs-module.c (module_free_global_ref): Actually remove entry
from hash table.

Copyright-paperwork-exempt: yes

* src/emacs-module.c (module_free_global_ref): Re-add assertion that
the reference count is zero.  This assertion was removed in commit
8afaa13, but it's not included in the
test performed by XFASTINT before, because the previous reference
count could have been zero already in the case of a buggy
implementation.  This assertion might have detected Bug#27587.

* src/emacs-module.c (module_free_global_ref): Remove unused variable
'hashcode'.  Inline variable 'value' that's only used once.

Without this fix, (substitute-object-in-subtree #0=(#0# 'a) 'a)
would dump core, since the C code would recurse indefinitely through
the infinite structure.  This patch adds an argument to the function,
and renames it to lread--substitute-object-in-subtree as the function
is not general-purpose and should not be relied on by outside code.
See Bug#23660.
* src/intervals.c (traverse_intervals_noorder): ARG is now void *,
not Lisp_Object, so that callers need not cons unnecessarily.
All callers changed.  Also, remove related #if-0 code that was
“temporary” in the early 1990s and has not been compilable for
some time.
* src/lread.c (struct subst): New type, for substitution closure data.
(seen_list): Remove this static var, as this info is now part of
struct subst.  All uses removed.
(Flread__substitute_object_in_subtree): Rename from
Fsubstitute_object_in_subtree, and give it a 3rd arg so that it
doesn’t dump core when called from the top level with an
already-cyclic structure.  All callers changed.
(SUBSTITUTE): Remove.  All callers expanded and then simplified.
(substitute_object_recurse): Take a single argument SUBST rather
than a pair OBJECT and PLACEHOLDER, so that its address can be
passed around as part of a closure; this avoids the need for an
AUTO_CONS call.  All callers changed.  If the COMPLETED component
is t, treat every subobject as potentially circular.
(substitute_in_interval): Take a struct subst * rather than a
Lisp_Object, for the closure data.  All callers changed.
* test/src/lread-tests.el (lread-lread--substitute-object-in-subtree):
New test, to check that the core dump does not reoccur.

* test/src/emacs-module-tests.el
(module--test-assertions--load-non-live-object)
(module--test-assertions--call-emacs-from-gc):
Avoid test failures due to backtraces.

* doc/misc/tramp.texi: Use consequently "@value{tramp}" and
"MS Windows".
(Quick Start Guide): New node.

* doc/misc/trampver.texi:
* lisp/net/trampver.el: Change version to "2.3.3-pre".

* lisp/net/tramp.el (tramp-with-demoted-errors): New defmacro.

* lisp/net/tramp-sh.el (tramp-sh-handle-vc-registered): Use it.

* src/fns.c (assoc): New optional testfn parameter used for comparison
when provided.
* test/src/fns-tests.el (test-assoc-testfn): Add tests for the new
'testfn' parameter.
* src/buffer.c:
* src/coding.c:
* src/dbusbind.c:
* src/font.c:
* src/fontset.c:
* src/gfilenotify.c:
* src/image.c:
* src/keymap.c:
* src/process.c:
* src/w32fns.c:
* src/w32font.c:
* src/w32notify.c:
* src/w32term.c:
* src/xdisp.c:
* src/xfont.c: Add a third argument to Fassoc calls.
* etc/NEWS:
* doc/lispref/lists.texi: Document the new 'testfn' parameter.

* src/xdisp.c (syms_of_xdisp) <display-line-numbers>: Improve the
doc string.  Suggested by Alex <agrambot@gmail.com>.

* lisp/faces.el (line-number): Use a fixed-pitch font by default,
even if the default face uses a variable-pitch font.  Reported by
James Cloos <cloos@jhcloos.com>.

* src/lread.c (close_infile_unwind): A temporary band-aid solution
for bug#27642: allow 'infile' be NULL.

* src/xdisp.c (Vdisplay_line_numbers): Tweak doc-string.
(Vdisplay_line_number_width): Rename to
Vdisplay_line_numbers_width.
(maybe_produce_line_number): Comply with above rename.
* lisp/cus-start.el (standard):
* lisp/frame.el (top-level):
* etc/NEWS: Comply with renaming of
`display-line-number-width' to `display-line-numbers-width'.

* lisp/progmodes/cc-defs.el (c-set-keymap-parent): New macro.

* lisp/progmodes/cc-mode.el (top-level): Remove cc-bytecomp-defun for
set-keymap-parents.
(c-make-inherited-keymap): Use c-set-keymap-parent in place of inline code.

* lisp/progmodes/cc-mode.el (top level): Make prog-mode-map the parent of
c-mode-base-map if possible.

* lisp/progmodes/cc-cmds.el (c-defun-name): Fix some bugs to do with structs,
etc.

* lisp/ses.el (ses-relocate-all): In case of insertion, do not
relocate value for named cells as they keep the same symbol.
(ses-rename-cell): Set new cell name symbol to cell value --- do not
rely on recalculating.  Push cells with updated data --- cell name,
cell reference list, or cell formula --- to deferred write list.

* test/lisp/ses-tests.el: New file, with 7 tests for SES.

This fontification anomaly happened because after deleting the ">",
c-forward-<>-arglist parses the preceding identifier as a putative type but
stores it in c-found-types before it becomes clear it is not an unambiguous
type.  c-forward-<>-arglist fails, leaving the spurious type id in
c-found-types.  Fix this by "binding" c-found-types "to itself" in
c-forward-<>-arglist, and restoring the original value when that function call
fails.

* lisp/progmodes/cc-engine.el (c-copy-found-types): New function.
(c-forward-<>-arglist): Record the original value of c-found-types at the
beginning of the function, and restore it at the end on failure.

* lisp/progmodes/cc-mode.el (c-unfind-coalesced-tokens): Rewrite more
accurately.

This incorporates:
2017-07-13 Improve cross-compilation guesses for native Windows
2017-07-11 More systematic m4 quoting and indentation
2017-07-10 Make sure $host and $host_os are defined when used
2017-07-03 stdioext: Port to OpenVMS
2017-06-24 xalloc-oversized: port to icc
* doc/misc/texinfo.tex, lib/fpending.c, lib/stdio-impl.h:
* lib/xalloc-oversized.h, m4/dirfd.m4, m4/gettimeofday.m4:
* m4/lstat.m4, m4/mktime.m4, m4/pselect.m4, m4/putenv.m4:
* m4/stdint.m4, m4/strtoimax.m4, m4/utimes.m4:
Copy from Gnulib.

This reverts commit d014a5e.
* lisp/faces.el (line-number): Don't use a fixed-pitch font, by
popular demand.  For relevant discussions, see

 http://lists.gnu.org/archive/html/emacs-devel/2017-07/msg00433.html
 http://lists.gnu.org/archive/html/emacs-devel/2017-07/msg00445.html

* src/xdisp.c (try_window_reusing_current_matrix): If giving up
due to display-line-numbers, clear the window's desired glyph
matrix before returning, as the following call to try_window will
call display_line, which expects rows of the desired matrix
cleared.  (Bug#27668)

* src/xdisp.c (maybe_produce_line_number): Add assertion for the
condition regarding IT->glyph_row->used[TEXT_AREA] expected by the
code.  (Bug#27668)

* lisp/files.el (insert-directory, create-file-buffer): Add an
advertised-calling-convention form to shut up byte-compilation
warnings.  (Bug#14860)

* lisp/mail/rmail.el (rmail-show-message-1): Delete the second
copy of '(message "Showing message %d..." msg)'.  (Bug#27535)

* test/lisp/net/tramp-tests.el (tramp-test36-asynchronous-requests):
Adjust timer if it takes too much time.

* lisp/emacs-lisp/cl-lib.el (cl--random-state): Remove.
This variable is now defined in cl-extra.el (Bug#27617).

Problem reported by Steve Kemp (Bug#27585).
* src/eval.c (near_C_stack_top): Remove.  All uses replaced
by current_thread->stack_top.
(record_in_backtrace): Set current_thread->stack_top.
This is for when the Lisp interpreter calls itself.
* src/lread.c (read1): Set current_thread->stack_top.
This is for recursive s-expression reads.
* src/print.c (print_object): Set current_thread->stack_top.
This is for recursive s-expression printing.
* src/thread.c (mark_one_thread): Get stack top first.
* src/thread.h (struct thread_state.stack_top): Now void *, not char *.

* lisp/leim/quail/latin-alt.el: Remove Turkish ligatures (Bug#518).

* lisp/leim/quail/latin-alt.el: Omit lines for ij and IJ in Dutch.
Problem reported by James Cloos (Bug#518#10).

It's also defined in cl-extra.el.

    * etc/NEWS: Add news for new feature.

    * doc/lispref/text.texi (GnuTLS Cryptography): Add
    documentation.

    * configure.ac: Add macros HAVE_GNUTLS3_DIGEST,
    HAVE_GNUTLS3_CIPHER, HAVE_GNUTLS3_AEAD, HAVE_GNUTLS3_HMAC.

    * src/fns.c (Fsecure_hash_algorithms): Add function to list
    supported `secure-hash' algorithms.
    (extract_data_from_object): Add data extraction function that
    can operate on buffers and strings.
    (secure_hash): Use it.
    (Fsecure_hash): Mention `secure-hash-algorithms'.

    * src/gnutls.h: Include gnutls/crypto.h.

    * src/gnutls.c (Fgnutls_ciphers, gnutls_symmetric_aead)
    (gnutls_symmetric, Fgnutls_symmetric_encrypt, Fgnutls_symmetric_decrypt)
    (Fgnutls_macs, Fgnutls_digests, Fgnutls_hash_mac, Fgnutls_hash_digest)
    (Fgnutls_available_p): Implement GnuTLS cryptographic integration.

    * test/lisp/net/gnutls-tests.el: Add tests.

* lisp/emacs-lisp/bytecomp.el (byte-compile--function-signature): New fun.
Dig into advice wrappers to find the "real" signature.
(byte-compile-callargs-warn, byte-compile-arglist-warn): Use it.
(byte-compile-arglist-signature): Don't bother with "new-style" arglists,
since bytecode functions are now handled in byte-compile--function-signature.

* lisp/files.el (create-file-buffer, insert-directory):
Remove workaround introduced for (bug#14860).

* lisp/help-fns.el (help-fns--analyse-function): `nadvice` is preloaded.

* lisp/help.el (help-function-arglist):
Dig into advice wrappers to find the "real" signature.

* src/gnutls.c [WINDOWSNT]: Add DEF_DLL_FN for new functions.
(init_gnutls_functions) [WINDOWSNT]: Add LOAD_DLL_FN for new
functions.  Add #define redirections for new functions.
(gnutls_symmetric_aead): Fix format specs to be more portable when
printing ptrdiff_t arguments.
* src/fns.c (gnutls_rnd) [WINDOWSNT]: Redirect to w32_gnutls_rnd
wrapper.
* src/gnutls.h [WINDOWSNT]: Add prototype for w32_gnutls_rnd.

* test/lisp/net/gnutls-tests.el (gnutls-tests-tested-macs)
(gnutls-tests-tested-digests, gnutls-tests-tested-ciphers): Call
gnutls-available-p, otherwise GnuTLS functions might not be loaded
from the DLL on MS-Windows.