bug#18659: closed (24.3.94; Crash in deselect_palette (Cygwin-w32 build))

[GNU bug Tracking System]

Your message dated Wed, 9 Sep 2020 11:10:53 -0400
with message-id <68b5892e-67d1-fce1-feb9-3b094c4d8ff2@cornell.edu>
and subject line Re: bug#17688: 24.3.90; segmentation fault in deselect_palette
has caused the debbugs.gnu.org bug report #17688,
regarding 24.3.94; Crash in deselect_palette (Cygwin-w32 build)
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs@gnu.org.)


-- 
17688: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17688
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems

--- Begin Message --- Subject: 24.3.94; Crash in deselect_palette (Cygwin-w32 build) Date: Tue, 07 Oct 2014 16:02:02 -0400 User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 I just tried to view an emacs window that had been idle for a long time. I don't remember if I was using Alt-Tab to cycle through the open windows or if I clicked on the emacs icon in the task bar. When I couldn't get to the window, I checked the terminal from which I had started emacs under gdb, and I saw that emacs had crashed:

Program received signal SIGSEGV, Segmentation fault.
0x000000010068e6c9 in deselect_palette (f=0x0, hdc=0x0)
    at /usr/src/debug/emacs-24.3.94-1/src/w32xfns.c:123
123       if (f->output_data.w32->old_palette)

(gdb) bt
#0  0x000000010068e6c9 in deselect_palette (f=0x0, hdc=0x0)
    at /usr/src/debug/emacs-24.3.94-1/src/w32xfns.c:123
#1  0x000000010068e798 in release_frame_dc (f=0x0, hdc=0x0)
    at /usr/src/debug/emacs-24.3.94-1/src/w32xfns.c:154

#2 0x0000000100691df6 in uniscribe_encode_char (font=0x1010f5e98 <bss_sbrk_buffer+6283800>, c=32) at /usr/src/debug/emacs-24.3.94-1/src/w32uniscribe.c:585 #3 0x000000010047dfe5 in get_glyph_face_and_encoding (f=0x1010f3c48 <bss_sbrk_buffer+6275016>, glyph=0x60075a850, char2b=0x4280ce L"\003腐 B", two_byte_p=0x0)

    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:24024

#4 0x000000010047f230 in x_get_glyph_overhangs (glyph=0x60075a850, f=0x1010f3c48 <bss_sbrk_buffer+6275016>, left=0x428130, right=0x42812c)

    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:24367
#5  0x000000010047f55b in left_overwriting (s=0x4281c0)
    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:24446

#6 0x0000000100481200 in draw_glyphs (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, x=625, row=0x600790f20, area=TEXT_AREA, start=77, end=78, hl=

    DRAW_NORMAL_TEXT, overlaps=0)
    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:24945

#7 0x0000000100489ed1 in x_write_glyphs (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, updated_row=0x600790f20, start=0x60075ae20, updated_area=TEXT_AREA, len=1)

    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:26812

#8 0x000000010040a277 in update_text_area (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, updated_row=0x600790f20, vpos=23)

    at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3746

#9 0x000000010040a64d in update_window_line (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, vpos=23, mouse_face_overwritten_p=0x42878f)

    at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3848

#10 0x000000010040952b in update_window (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, force_p=true) at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3427 #11 0x0000000100408c9a in update_window_tree (w=0x1010f4c48 <bss_sbrk_buffer+6279112>, force_p=true) at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3210

#12 0x0000000100408c63 in update_window_tree (w=0x600691538, force_p=true)
    at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3208

#13 0x00000001004088b7 in update_frame (f=0x1010f3c48 <bss_sbrk_buffer+6275016>, force_p=true, inhibit_hairy_id_p=false)

    at /usr/src/debug/emacs-24.3.94-1/src/dispnew.c:3099
#14 0x0000000100453e6c in redisplay_internal ()
    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:13967
#15 0x000000010045495f in redisplay_preserve_echo_area (from_where=8)
    at /usr/src/debug/emacs-24.3.94-1/src/xdisp.c:14185
#16 0x00000001005475cc in detect_input_pending_run_timers (do_display=true)
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:9897

#17 0x000000010063a6e7 in wait_reading_process_output (time_limit=0, nsecs=0, read_kbd=-1, do_display=true, wait_for_cell=4306509874, wait_proc=0x0, just_wait_proc=0) at /usr/src/debug/emacs-24.3.94-1/src/process.c:4699 #18 0x0000000100538e14 in kbd_buffer_get_event (kbp=0x429b88, used_mouse_menu=0x42a3cf, end_time=0x0) at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:3906 #19 0x0000000100533cf3 in read_event_from_main_queue (end_time=0x0, local_getcjmp=0x429fb0, used_mouse_menu=0x42a3cf)

    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:2246

#20 0x0000000100534030 in read_decoded_event_from_main_queue (end_time=0x0, local_getcjmp=0x429fb0, prev_event=4306509874, used_mouse_menu=0x42a3cf)

    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:2309

#21 0x0000000100535fe4 in read_char (commandflag=1, map=25780162614, prev_event=4306509874, used_mouse_menu=0x42a3cf, end_time=0x0)

    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:2895

#22 0x00000001005455af in read_key_sequence (keybuf=0x42a5e0, bufsize=30, prompt=4306509874, dont_downcase_last=false, can_return_switch_frame=true, fix_current_buffer=true, prevent_redisplay=false)

    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:9088
#23 0x0000000100531a04 in command_loop_1 ()
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:1452

#24 0x00000001005dbdf0 in internal_condition_case (bfun=0x1005314ef <command_loop_1>, handlers=4306584322, hfun=0x100530a7a <cmd_error>)

    at /usr/src/debug/emacs-24.3.94-1/src/eval.c:1348
#25 0x00000001005310bd in command_loop_2 (ignore=4306509874)
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:1177

#26 0x00000001005db141 in internal_catch (tag=4306578482, func=0x10053108b <command_loop_2>, arg=4306509874) at /usr/src/debug/emacs-24.3.94-1/src/eval.c:1112

#27 0x000000010053104c in command_loop ()
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:1156
#28 0x00000001005304db in recursive_edit_1 ()
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:777
#29 0x000000010053070d in Frecursive_edit ()
    at /usr/src/debug/emacs-24.3.94-1/src/keyboard.c:848
#30 0x000000010052e3e3 in main (argc=1, argv=0x42ab00)
    at /usr/src/debug/emacs-24.3.94-1/src/emacs.c:1647

Lisp Backtrace:
"redisplay_internal (C function)" (0xaf7720)

A full backtrace of all threads is attached.

At the time of the crash, the emacs frame was split into two windows. One was viewing a plain text C++ file (ASCII only), and the other was a *grep* buffer from `M-x rgrep'. I have no idea how that strange (Chinese?) character got into frame 3.

I still have the gdb session open.

Ken

In GNU Emacs 24.3.94.1 (x86_64-unknown-cygwin)
 of 2014-10-03 on desktop-new
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure

--srcdir=/home/kbrown/src/cygemacs/emacs-24.3.94-1.x86_64/src/emacs-24.3.94
 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
 --libexecdir=/usr/libexec --datadir=/usr/share --localstatedir=/var
 --sysconfdir=/etc --libdir=/usr/lib --datarootdir=/usr/share
 --docdir=/usr/share/doc/emacs --htmldir=/usr/share/doc/emacs/html -C
 --with-w32 --with-file-notification=no --enable-checking=yes,glyphs
 'CFLAGS=-ggdb -O2 -pipe -Wimplicit-function-declaration -O0 -g3

-fdebug-prefix-map=/home/kbrown/src/cygemacs/emacs-24.3.94-1.x86_64/build=/usr/src/debug/emacs-24.3.94-1

-fdebug-prefix-map=/home/kbrown/src/cygemacs/emacs-24.3.94-1.x86_64/src/emacs-24.3.94=/usr/src/debug/emacs-24.3.94-1'
 CPPFLAGS= LDFLAGS=-Wl,--stack,0x400000'

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Text

Minor modes in effect:
  show-paren-mode: t
  display-time-mode: t
  delete-selection-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  temp-buffer-resize-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  auto-fill-function: do-auto-fill
  transient-mark-mode: t
  view-mode: t

Load-path shadows:
None found.

Features:
(misearch multi-isearch mailalias mailclient browse-url qp help-mode pp
shadow gnus-util mail-extr emacsbug message cl-macs format-spec rfc822
mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils view server dired edmacro kmacro solar cal-dst
planner-diary cl gv diary-lib diary-loaddefs planner-publish muse-xml
planner advice help-fns cal-menu calendar cal-loaddefs sort muse-colors
muse-latex muse-html muse-xml-common cus-edit muse-publish muse-project
muse-protocols muse-regexps wid-edit cl-loaddefs cl-lib derived muse
muse-nested-tags muse-mode gap-mode-autoloads info easymenu
muse-autoloads package epg-config preview-latex tex-site auto-loads
saveplace paren help-at-pt time delsel cus-start cus-load time-date
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind w32
multi-tty emacs)

deselect_palette_bt.gz
Description: application/gzip

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#17688: 24.3.90; segmentation fault in deselect_palette
>
>
>
>
> Date: 
>
> Wed, 9 Sep 2020 11:10:53 -0400
>
>
>
>
> User-agent: 
>
> Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0
>
>
>
>
> On 9/9/2020 7:53 AM, Lars Ingebrigtsen wrote:
> > Ken Brown <kbrown@cornell.edu> writes:
> >
> > > That's been the problem for several months.  People have reported
> > > several crashes of the Cygwin-w32 build, always on 64-bit Cygwin, with
> > > backtraces that "can't happen".  Can you think of any way to try to
> > > track this down?
> >
> > This was six years ago.  Are you still seeing these crashes with the
> > current Cygwin/Emacs versions?
>
> No, it got fixed.  Closing.
>
> Ken
>
>
> --- End Message ---