bug#39081: 26.3; Emacs hangs if external SCIM input method is killed

[Vladimir Nikishkin]

Here you are:

lockywolf@delllaptop:~/DevLinux/chibi-sicp$ gdb -p $(pgrep emacs)
/usr/share/gdb/python/gdb/command/prompt.py:48: SyntaxWarning: "is
not" with a literal. Did you mean "!="?
  if self.value is not '':
/usr/share/gdb/python/gdb/command/prompt.py:60: SyntaxWarning: "is
not" with a literal. Did you mean "!="?
  if self.value is not '':
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Attaching to process 3351
[New LWP 3352]
[New LWP 3353]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
0x00007fd647209966 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib64/libpthread.so.0
(gdb) thread apply all bt

Thread 3 (Thread 0x7fd63f86a700 (LWP 3353)):
#0  0x00007fd646c6ae9f in poll () at /lib64/libc.so.6
#1  0x00007fd648d27cee in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fd648d28053 in g_main_loop_run () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fd648f5d666 in  () at /usr/lib64/libgio-2.0.so.0
#4  0x00007fd648d4f98d in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fd64720306b in start_thread () at /lib64/libpthread.so.0
#6  0x00007fd646c7672f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fd644952700 (LWP 3352)):
#0  0x00007fd646c6ae9f in poll () at /lib64/libc.so.6
#1  0x00007fd648d27cee in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fd648d27e0f in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007fd648d27e61 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fd648d4f98d in  () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fd64720306b in start_thread () at /lib64/libpthread.so.0
#6  0x00007fd646c7672f in clone () at /lib64/libc.so.6

--Type <RET> for more, q to quit, c to continue without paging--
Thread 1 (Thread 0x7fd6449fcd00 (LWP 3351)):
#0  0x00007fd647209966 in pthread_cond_wait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007fd648bb22ef in _XReadEvents () at /usr/lib64/libX11.so.6
#2  0x00007fd648b9a7f5 in XIfEvent () at /usr/lib64/libX11.so.6
#3  0x00007fd648be021f in  () at /usr/lib64/libX11.so.6
#4  0x00007fd648be0bc2 in  () at /usr/lib64/libX11.so.6
#5  0x00007fd648be0e5c in _XimRead () at /usr/lib64/libX11.so.6
#6  0x00007fd648bd02f8 in  () at /usr/lib64/libX11.so.6
#7  0x00007fd648bbeca2 in XDestroyIC () at /usr/lib64/libX11.so.6
#8  0x00000000004d8a8c in  ()
#9  0x00000000004d0fb7 in  ()
#10 0x00000000004d16ab in  ()
#11 0x000000000042a76b in  ()
#12 0x00000000004c732b in  ()
#13 0x00000000004c757a in  ()
#14 0x00000000004c7606 in  ()
#15 0x00007fd648bb4827 in _XError () at /usr/lib64/libX11.so.6
#16 0x00007fd648bb1797 in  () at /usr/lib64/libX11.so.6
#17 0x00007fd648bb1825 in  () at /usr/lib64/libX11.so.6
--Type <RET> for more, q to quit, c to continue without paging--
#18 0x00007fd648bb26ed in _XReply () at /usr/lib64/libX11.so.6
#19 0x00007fd648ba8e56 in XQueryPointer () at /usr/lib64/libX11.so.6
#20 0x00007fd649254a5a in  () at /usr/lib64/libgdk-3.so.0
#21 0x00007fd6492726f7 in  () at /usr/lib64/libgdk-3.so.0
#22 0x00007fd6492461d8 in gdk_window_get_device_position_double () at
/usr/lib64/libgdk-3.so.0
#23 0x00007fd649254b81 in  () at /usr/lib64/libgdk-3.so.0
#24 0x00007fd6496581f9 in  () at /usr/lib64/libgtk-3.so.0
#25 0x00007fd64968597b in  () at /usr/lib64/libgtk-3.so.0
#26 0x00007fd648e0fc32 in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#27 0x00007fd648e218b6 in  () at /usr/lib64/libgobject-2.0.so.0
#28 0x00007fd648e2a277 in g_signal_emit_valist () at
/usr/lib64/libgobject-2.0.so.0
#29 0x00007fd648e2b232 in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#30 0x00007fd649633b8a in  () at /usr/lib64/libgtk-3.so.0
#31 0x00007fd6494fedc2 in gtk_main_do_event () at /usr/lib64/libgtk-3.so.0
#32 0x00007fd649232a75 in  () at /usr/lib64/libgdk-3.so.0
#33 0x00007fd649263a42 in  () at /usr/lib64/libgdk-3.so.0
#34 0x00007fd648d27b2d in g_main_context_dispatch () at
/usr/lib64/libglib-2.0.so.0
#35 0x00007fd648d27d80 in  () at /usr/lib64/libglib-2.0.so.0
#36 0x00007fd648d27e0f in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#37 0x00007fd6494fe105 in gtk_main_iteration () at /usr/lib64/libgtk-3.so.0
#38 0x00000000004c7453 in  ()
#39 0x00000000004fe532 in  ()
#40 0x00000000004fe935 in  ()
#41 0x0000000000573242 in  ()
#42 0x0000000000573b11 in  ()
#43 0x0000000000574a86 in  ()
#44 0x00000000004faa03 in  ()
#45 0x00000000004faf8d in  ()
#46 0x00000000004fe6c7 in  ()
#47 0x00000000004fe83f in  ()
#48 0x00000000005b273f in  ()
#49 0x0000000000425d14 in  ()
#50 0x0000000000501998 in  ()
#51 0x00000000005030f8 in  ()
#52 0x000000000050479e in  ()
#53 0x0000000000569d7f in  ()
#54 0x00000000004f5bb8 in  ()
#55 0x0000000000569ce3 in  ()
--Type <RET> for more, q to quit, c to continue without paging--
#56 0x00000000004f5b46 in  ()
#57 0x00000000004f8bfc in  ()
#58 0x00000000004f8f30 in  ()
#59 0x000000000041c426 in  ()
#60 0x00007fd646b83e5b in __libc_start_main () at /lib64/libc.so.6
#61 0x000000000041d18a in  ()
(gdb)

сб, 11 янв. 2020 г. в 16:03, Eli Zaretskii <eliz@gnu.org>:
>
> > From: Vladimir Nikishkin <lockywolf@gmail.com>
> > Date: Sat, 11 Jan 2020 13:52:56 +0800
> >
> >
> > I am using Slackware-current (post 14.2), with SCIM input method enabled
> > in order to provide Chinese input method into other applications.
> > (I am aware about Emacs' build-in input method, and do not use SCIM
> > in Emacs itself. Still, Emacs is capable of receiving input from SCIM.)
> > If SCIM's process dies unexpectedly (such as if I issue sudo pkill -9
> > scim),
> > with probablility of about 1/2, Emacs hangs and stops responding to
> > input. I am using a GTK Emacs.
>
> Next time Emacs hangs, please attach GDB to it and show the backtrace
> for all the threads ("thread apply all bt" at GDB prompt).
>
> Thanks.



-- 
Yours sincerely, Vladimir Nikishkin