* lisp/progmodes/cc-engine.el (c-looking-at-c++-attribute)
(c-enclosing-c++-attribute, c-slow-enclosing-c++-attribute): New macro and
functions.
(c-crosses-statement-barrier-p): Add [ into skip-chars for C++ Mode, and use
it to detect and skip over an attribute whilst scanning forward.
(c-sws-lit-type): Use the new value 'attribute.
(c-invalidate-sws-region-before): Put a save-match-data around this function.
Detect and handle an enclosing attribute at either END or BEG.
(c-invalidate-sws-region-after): Handle C++ attributes.
(c-forward-sws, c-backward-sws): Handle C++ attributes.

* lisp/progmodes/cc-mode.el (c-fl-decl-end): Detect and handle point being
inside a C++ attribute.

Problem reported by Pip Cet in:
https://lists.gnu.org/r/emacs-devel/2019-07/msg00520.html
* src/alloc.c (inhibit_garbage_collection): Use new function.
(allow_garbage_collection): Accept intmax_t, not pointer.
* src/eval.c (default_toplevel_binding, do_one_unbind)
(backtrace_eval_unrewind, Fbacktrace__locals, mark_specpdl):
Support SPECPDL_UNWIND_INTMAX.
(record_unwind_protect_excursion): New function.
* src/lisp.h (enum specbind_tag): New constant SPECPDL_UNWIND_INTMAX.
(union specbinding): New member unwind_intmax.

* src/alloc.c (allow_garbage_collection)
(inhibit_garbage_collection): Temporarily bump
consing_until_gc, to improve performance of maybe_gc while
garbage collection is inhibited.  Suggested by Stefan Monnier in:
https://lists.gnu.org/r/emacs-devel/2019-07/msg00511.html

* src/fns.c (INDEX_SIZE_BOUND): Use a tighter bound.
(maybe_resize_hash_table): Avoid integer overflow when
checking for hash table size overflow.  Fix confusion
between INDEX_SIZE_BOUND (which is for the index vector)
and hash table size.  Fix typo in debugging message
when ENABLE_CHECKING.

* doc/lispref/hash.texi (Creating Hash, Defining Hash):
* src/fns.c (Fsxhash_eq, Fsxhash_eql, Fsxhash_equal):
Say that hashes are fixnums.
(Fmake_hash_table): Say that that an integer rehash-size
should be a fixnum.
* doc/lispref/hash.texi (Defining Hash): Say that hash and
comparison functions should be consistent and pure, and should
return quickly.

* src/alloc.c (pure_alloc): Clear any heap-allocated storage.
This is simpler than auditing all the callers to make sure
they don’t assume pure memory is cleared memory, and the
performance implication is nonexistent except when Emacs
is misconfigured.  Also, add an assertion to catch
caller misuse when pure space is exhausted.

* lisp/dired-x.el (dired-mark-unmarked-files): Make the unflag-p
parameter work (bug#27465).

* etc/emacs.service (ExecStop): Don't override SSH_AUTH_SOCK by
default, because it varies by distribution where the socket is
(bug#27620).

* lisp/mail/footnote.el (footnote--fill-paragraph): New function
(bug#27775).
(footnote-mode): Use it.

* src/fileio.c: (file_name_absolute_no_tilde_p):
New static function.
(Fexpand_file_name): If the current buffer's default-directory
starts with "~user" where "user" is not a valid user name, don't
give the '~' a special meaning.  Just treat the value of
default-directory as a relative name.  (Bug#36502)
* test/src/fileio-tests.el
(fileio-tests--relative-default-directory): Add a test.

* lisp/emacs-lisp/inline.el (inline-quote): Fix the edebug spec
(bug#31051).

* src/fns.c (maybe_resize_hash_table): Completely initialize the
new ‘next’ vector before allocating more vectors, as this
preserves locality a bit better and it’s safer not to leave an
uninitialized Lisp object around.  Use next_size instead of
new_size to compute new index size.

* src/fns.c (restore_mutability)
(hash_table_user_defined_call): New functions.
(cmpfn_user_defined, hashfn_user_defined): Use them.
(make_hash_table, copy_hash_table):
Mark new hash table as mutable.
(check_mutable_hash_table): New function.
(Fclrhash, Fputhash, Fremhash): Use it instead of CHECK_IMPURE.
* src/lisp.h (struct hash_table_test): User-defined functions
now take pointers to struct Lisp_Hash_Table, not to struct
hash_table_test.  All uses changed.
(struct Lisp_Hash_Table): New member ‘mutable’.
* src/pdumper.c (dump_hash_table): Copy it.
* test/src/fns-tests.el (test-hash-function-that-mutates-hash-table):
New test, which tests for the bug.

* src/fns.c (cmpfn_eql, cmpfn_equal, cmpfn_user_defined)
(hashfn_eq, hashfn_equal, hashfn_eql, hashfn_user_defined):
* src/profiler.c (cmpfn_profiler, hashfn_profiler):
Use new calling convention where the return value is a fixnum
instead of EMACS_UINT.  While we’re at it, put the hash table
at the end, since that’s a bit simpler and generates better
code (at least on the x86-64).  All callers changed.
* src/fns.c (hash_lookup): Store fixnum rather than EMACS_UINT.
All callers changed.
(hash_put): Take a fixnum rather than an EMACS_UINT.
All callers changed.  Remove unnecessary eassert (XUFIXNUM does it).
* src/lisp.h (struct hash_table_test):
Adjust signatures of cmpfn and hashfn.

Without this patch, there are unlikely ways that garbage
collection could occur (sometimes causing undefined behavior)
even when inhibit_garbage_collection is in effect.
* src/alloc.c (garbage_collection_inhibited): New var.
(pure_alloc): Increment it if pure space is exhausted, so that
garbage_collect_1 no longer needs to inspect
pure_bytes_used_before_overflow.
(allow_garbage_collection): New function.
(inhibit_garbage_collection): Increment the new variable rather
than specbinding a user variable.
(garbage_collect_1): Do not garbage collect if the new variable
is set, rather than if pure_bytes_used_before_overflow is set.

* src/alloc.c (consing_until_gc): New variable, replacing the
combination of consing_since_gc and gc_relative_threshold.
All uses changed.
(byte_ct): Move decl here from lisp.h.
(memory_full_cons_threshold): New an enum constant.
(free_cons): Check for integer overflow in
statistics calculation.
* src/lisp.h (object_ct): Move decl here from alloc.c.
(OBJECT_CT_MAX): New macro.
(maybe_gc): Simplify accordingly.

* src/lisp.h (struct Lisp_Hash_Table): Rename ‘pure’ member to
‘purecopy’, as the old name was quite confusing (it did not
mean the hash table was pure).  All uses changed.

* src/fns.c (set_hash_key_and_value, set_hash_next)
(set_hash_hash, set_hash_index): Remove.  All uses removed.
(maybe_resize_hash_table): Don’t update h->next until it’s
known that all the allocations succeeded, to avoid trashing
the hash table if memory is exhausted.  Don’t overallocate the
other vectors.  Don’t output growth message if the hash table
didn’t actually grow due to allocation failure.  Assume C99
decls after statements.

150bdfe4 Handle completely undecoded input in term (Bug#29918)
021f32cc * doc/misc/forms.texi (Control File Format): Fix a doc error.
76538d09 Fix typo in package-alist docstring
b2fde4b5 * doc/lispref/text.texi (Mode-Specific Indent): Fix a typo...
7e627785 ; Another minor change in 'bidi-display-reordering's doc s...
4455ddbe Improve doc string of 'bidi-display-reordering'
34ee26dd Add warning to bidi-display-reordering doc string

# Conflicts:
#	lisp/term.el
#	test/lisp/term-tests.el

* lisp/term.el (term-emulate-terminal): Avoid errors if the whole
decoded string is eight-bit characters.  Don't attempt to save the
string for next iteration in that case.
* test/lisp/term-tests.el (term-decode-partial)
(term-undecodable-input): New tests.

* lisp/image/compface.el: Use lexical-binding.  Extend Keywords
header.
(uncompface): Call call-process-region directly.

* doc/lispref/text.texi (Interpolated Strings): Use @result and fix
typos.
* lisp/format-spec.el: Avoid loading subr-x at runtime.
(format-spec--parse-modifiers): Optimize slightly.

* lisp/image.el (image-rotate): Extend with an optional argument
specifying the rotation in degrees (bug#35421).
* doc/lispref/display.texi (Showing Images):
* etc/NEWS: Document the change.
* test/lisp/image-tests.el (image-rotate): New test.

* lisp/gnus/gnus-art.el (article-make-date-combine-with-lapsed) factor
code out into new function, used for providing both combined-lapsed
and combined-local-lapsed.

* lisp/gnus/nnimap.el (nnimap-parse-flags): Clean up code
slightly, removing redundant checks for `end'.

(Bug#36693)

Copyright-paperwork-exempt: yes

* etc/NEWS: Call out the change in matching REGEXP.

* lisp/files.el (magic-mode-alist)
(magic-fallback-mode-alist): Doc fix.  (Bug#36401)

These variables are used for well-defined file formats where relaxed
case matching is not wanted usually.

* lisp/files.el (magic-mode-alist, magic-fallback-mode-alist): Update
the doc string.
(set-auto-mode): Make looking-at for elements of magic-mode-alist and
magic-fallback-mode-alist use case-fold-search == nil.
* lisp/files.el (files-test-magic-mode-alist-re-baseline)
(files-test-magic-mode-alist-re-no-match)
(files-test-magic-mode-alist-re-case-diff): Add.

* lisp/finder.el (finder-exit): Quit window instead of
deleting.  This restores previous contents of the window,
if any, that was usurped by "C-h p" to show the list of
packages.

* lisp/progmodes/octave.el (octave-eldoc-function): The
test of position of the opening parenthesis in
inferior-octave-process was duplicated.  Remove one of
the tests.  (Bug#36557)

* lisp/files.el (get-free-disk-space): Update doc string.
Use `iec' style and proper spacing.

* lisp/window.el (display-buffer-reuse-window): Preferably reuse
window on selected frame (Bug#36680).
* doc/lispref/windows.texi (Buffer Display Action Functions): Say
that 'display-buffer-reuse-window' prefers window on the selected
frame.

* lisp/progmodes/elisp-mode.el (emacs-lisp-set-electric-text-pairs):
New function.
(emacs-lisp-mode): Add it to electric-pair-mode-hook, if elec-pair
hasn't been loaded yet.

* test/lisp/help-fns-tests.el: Use lexical-binding.  Doc fix.

* lisp/mwheel.el: Update `Commentary' section.
(mwheel-install): Declare obsolete in favor of mouse-wheel-mode.
* etc/NEWS: Announce it.