Bug#782075: gnome-tweak-tool: Crashes Gnome when reducing Number of Workspaces

Wed Aug 31 15:08:08 UTC 2016

Control: tags -1 - moreinfo
Control: found -1 3.20.3-2

Hi

On 31.08.2016 06:09, Andreas Henriksson wrote:
> Are you still able to reproduce this issue? If so could you please
> provide a full backtrace including debugging symbols for it?
> 
> https://wiki.debian.org/HowToGetABacktrace

Yes, still happens every time I decrease the number of workspace
windows by one. If I repeat that step the whole GNOME session
crashes.

See attached screenlog.0

I followed https://wiki.gnome.org/Projects/GnomeShell/Debugging
(and added that link to the Debian wiki).

Exact steps I did:
[INSTALL] libmozjs-24-0-dbg:amd64 24.2.0-3.1
[INSTALL] libmutter0h-dbgsym:amd64 3.20.3-2
[INSTALL] libpulse0-dbgsym:amd64 9.0-2
[INSTALL] gnome-shell-dbgsym:amd64 3.20.3-1+b1
$ cat ~/xenv.sh
gnome_session=$(pgrep -u $USER gnome-session)
eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep DISPLAY)
eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep XAUTHORITY)
eval export $(sed 's/\o000/\n/g;' < /proc/$gnome_session/environ | grep DBUS_SESSION_BUS_ADDRESS)
--> Reboot
--> Login GNOME
--> CTRL-ALT-F3
--> Login tty3
$ screen
CTRL + A
SHIFT + H
$ . ~/xenv.sh
$ gdb --args /usr/bin/gnome-shell --replace
(gdb) run
--> CTRL-ALT-F2
--> Start Tweak Tool
    Number of Workspaces was set to 2, but the same happens for 3 or 4.
--> Decrease Number of Workspaces by one
--> CRASH
--> CTRL-ALT-F3
(gdb) t a a bt
...
(gdb) call gjs_dumpstack ()

Greets
jre
-------------- next part --------------
jens at hope:~$ . xenv.sh
jens at hope:~$ gdb --args /usr/bin/gnome-shell --replace
GNU gdb (Debian 7.11.1-2) 7.11.1
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Reading symbols from /usr/bin/gnome-shell...Reading symbols from /usr/lib/debug/.build-id/8c/1e32f199e1391f19f8887cefa889baa7a5a774.debug...done.
done.
(gdb) run
Starting program: /usr/bin/gnome-shell --replace
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffdff9c700 (LWP 5010)]
[New Thread 0x7fffdd5a9700 (LWP 5042)]
[New Thread 0x7fffdcda8700 (LWP 5043)]
[New Thread 0x7fffcffff700 (LWP 5044)]
[New Thread 0x7fffcf7fe700 (LWP 5045)]
[New Thread 0x7fffceffd700 (LWP 5046)]
[New Thread 0x7fffce7fc700 (LWP 5047)]
Gjs-Message: JS LOG: Failed to launch ibus-daemon: Failed to execute child process "ibus-daemon" (No such file or directory)
Gjs-Message: JS LOG: Failed to add search provider /usr/share/gnome-shell/search-providers/org.gnome.bijiben-search-provider.ini: TypeError: appInfo is null
[New Thread 0x7fffabfff700 (LWP 5066)]
[New Thread 0x7fffaa668700 (LWP 5073)]
[Thread 0x7fffdcda8700 (LWP 5043) exited]
[Thread 0x7fffabfff700 (LWP 5066) exited]
[New Thread 0x7fffabfff700 (LWP 5077)]
[New Thread 0x7fffdcda8700 (LWP 5078)]
[New Thread 0x7fffa9e67700 (LWP 5079)]
[New Thread 0x7fffa8b9c700 (LWP 5080)]
[New Thread 0x7fff9fffe700 (LWP 5081)]
[New Thread 0x7fff9f7fd700 (LWP 5082)]
[Thread 0x7fffa9e67700 (LWP 5079) exited]
[Thread 0x7fffaa668700 (LWP 5073) exited]
[Thread 0x7fff9f7fd700 (LWP 5082) exited]
[Thread 0x7fffa8b9c700 (LWP 5080) exited]
[New Thread 0x7fffa8b9c700 (LWP 5103)]
[New Thread 0x7fff9f7fd700 (LWP 5104)]
[New Thread 0x7fffaa668700 (LWP 5107)]
[New Thread 0x7fffa9e67700 (LWP 5108)]
[New Thread 0x7fff9effc700 (LWP 5109)]
[New Thread 0x7fff9e7fb700 (LWP 5110)]
[New Thread 0x7fff9dffa700 (LWP 5112)]
[Thread 0x7fff9e7fb700 (LWP 5110) exited]
[Thread 0x7fffa8b9c700 (LWP 5103) exited]
[Thread 0x7fff9f7fd700 (LWP 5104) exited]
[Thread 0x7fffdcda8700 (LWP 5078) exited]
[Thread 0x7fffa9e67700 (LWP 5108) exited]
[Thread 0x7fff9fffe700 (LWP 5081) exited]
[Thread 0x7fffabfff700 (LWP 5077) exited]
[Thread 0x7fff9effc700 (LWP 5109) exited]
[Thread 0x7fff9dffa700 (LWP 5112) exited]
[New Thread 0x7fff9dffa700 (LWP 5162)]
[Thread 0x7fffaa668700 (LWP 5107) exited]
**
mutter:ERROR:core/screen.c:1206:update_num_workspaces: assertion failed: (w->windows == NULL)

Thread 1 "gnome-shell" received signal SIGABRT, Aborted.
0x00007ffff4a30198 in __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
54	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) t a a bt

Thread 24 (Thread 0x7fff9dffa700 (LWP 5162)):
#0  0x00007ffff4adfd49 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff50494ea in g_cond_wait_until (cond=cond at entry=0x889668, mutex=mutex at entry=0x889660, end_time=end_time at entry=256691609) at ././glib/gthread-posix.c:1441
#2  0x00007ffff4fd9a09 in g_async_queue_pop_intern_unlocked (queue=queue at entry=0x889660, wait=wait at entry=1, end_time=end_time at entry=256691609) at ././glib/gasyncqueue.c:422
#3  0x00007ffff4fda02c in g_async_queue_timeout_pop (queue=0x889660, timeout=timeout at entry=15000000) at ././glib/gasyncqueue.c:543
#4  0x00007ffff502bf9d in g_thread_pool_thread_proxy () at ././glib/gthreadpool.c:167
#5  0x00007ffff502bf9d in g_thread_pool_thread_proxy (data=<optimized out>) at ././glib/gthreadpool.c:364
#6  0x00007ffff502b4d5 in g_thread_proxy (data=0x7fffc8002050) at ././glib/gthread.c:780
#7  0x00007ffff4da5444 in start_thread (arg=0x7fff9dffa700) at pthread_create.c:333
#8  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fffce7fc700 (LWP 5047)):
#0  0x00007ffff4dab07f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe69f4d70 in PR_WaitCondVar (cvar=0xaf4760, timeout=timeout at entry=4294967295) at ptsynch.c:396
#2  0x00007ffff08fe536 in js::SourceCompressorThread::compressorThread(void*) (this=0xb0da58) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsscript.cpp:1094
#3  0x00007ffff08fe536 in js::SourceCompressorThread::compressorThread(void*) (arg=0xb0da58) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsscript.cpp:965
#4  0x00007fffe69fa758 in _pt_root (arg=0x9f8270) at ptthread.c:216
#5  0x00007ffff4da5444 in start_thread (arg=0x7fffce7fc700) at pthread_create.c:333
#6  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fffceffd700 (LWP 5046)):
#0  0x00007ffff4dab07f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe69f4d70 in PR_WaitCondVar (cvar=0x9a9520, timeout=timeout at entry=4294967295) at ptsynch.c:396
#2  0x00007ffff088b15e in js::GCHelperThread::threadLoop() (this=0xb0d978) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsgc.cpp:2266
#3  0x00007fffe69fa758 in _pt_root (arg=0x95e670) at ptthread.c:216
#4  0x00007ffff4da5444 in start_thread (arg=0x7fffceffd700) at pthread_create.c:333
#5  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fffcf7fe700 (LWP 5045)):
#0  0x00007ffff4adb09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff0e6b9e1 in poll_func (__timeout=-1, __nfds=3, __fds=0x7fffbc006ca0) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007ffff0e6b9e1 in poll_func (ufds=0x7fffbc006ca0, nfds=3, timeout=-1, userdata=0x9ead10) at pulse/thread-mainloop.c:69
#3  0x00007ffff0e5d1b1 in pa_mainloop_poll (m=m at entry=0x940950) at pulse/mainloop.c:844
#4  0x00007ffff0e5d84e in pa_mainloop_iterate (m=0x940950, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007ffff0e5d900 in pa_mainloop_run (m=0x940950, retval=retval at entry=0x0) at pulse/mainloop.c:944
#6  0x00007ffff0e6b929 in thread (userdata=0x9eacd0) at pulse/thread-mainloop.c:100
#7  0x00007fffe7480908 in internal_thread_func (userdata=0x9eb7c0) at pulsecore/thread-posix.c:81
#8  0x00007ffff4da5444 in start_thread (arg=0x7fffcf7fe700) at pthread_create.c:333
#9  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fffcffff700 (LWP 5044)):
#0  0x00007ffff4adb09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff50051f6 in g_main_context_iterate (priority=<optimized out>, n_fds=1, fds=0x7fffc80010c0, timeout=<optimized out>, context=0x8a21d0) at ././glib/gmain.c:4135
#2  0x00007ffff50051f6 in g_main_context_iterate (context=context at entry=0x8a21d0, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3835
#3  0x00007ffff500530c in g_main_context_iteration (context=context at entry=0x8a21d0, may_block=may_block at entry=1) at ././glib/gmain.c:3901
#4  0x00007fffdc3a241d in dconf_gdbus_worker_thread (user_data=0x8a21d0) at dconf-gdbus-thread.c:82
#5  0x00007ffff502b4d5 in g_thread_proxy (data=0x7fffd00046d0) at ././glib/gthread.c:780
#6  0x00007ffff4da5444 in start_thread (arg=0x7fffcffff700) at pthread_create.c:333
#7  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fffdd5a9700 (LWP 5042)):
#0  0x00007ffff4adb09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff50051f6 in g_main_context_iterate (priority=<optimized out>, n_fds=3, fds=0x7fffd00010c0, timeout=<optimized out>, context=0x88ab20) at ././glib/gmain.c:4135
#2  0x00007ffff50051f6 in g_main_context_iterate (context=0x88ab20, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3835
---Type <return> to continue, or q <return> to quit---
#3  0x00007ffff5005582 in g_main_loop_run (loop=0x88aab0) at ././glib/gmain.c:4034
#4  0x00007ffff580f956 in gdbus_shared_thread_func (user_data=0x88aaf0) at ././gio/gdbusprivate.c:246
#5  0x00007ffff502b4d5 in g_thread_proxy (data=0x64c540) at ././glib/gthread.c:780
#6  0x00007ffff4da5444 in start_thread (arg=0x7fffdd5a9700) at pthread_create.c:333
#7  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fffdff9c700 (LWP 5010)):
#0  0x00007ffff4adb09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff50051f6 in g_main_context_iterate (priority=<optimized out>, n_fds=2, fds=0x7fffd80008e0, timeout=<optimized out>, context=0x64c0c0) at ././glib/gmain.c:4135
#2  0x00007ffff50051f6 in g_main_context_iterate (context=context at entry=0x64c0c0, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3835
#3  0x00007ffff500530c in g_main_context_iteration (context=0x64c0c0, may_block=may_block at entry=1) at ././glib/gmain.c:3901
#4  0x00007ffff5005351 in glib_worker_main (data=<optimized out>) at ././glib/gmain.c:5672
#5  0x00007ffff502b4d5 in g_thread_proxy (data=0x64c400) at ././glib/gthread.c:780
#6  0x00007ffff4da5444 in start_thread (arg=0x7fffdff9c700) at pthread_create.c:333
#7  0x00007ffff4ae420d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffff7edda80 (LWP 5006)):
#0  0x00007ffff4a30198 in __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007ffff4a3161a in __GI_abort () at abort.c:89
#2  0x00007ffff502a6a5 in g_assertion_message (domain=domain at entry=0x7ffff69d4f7c "mutter", file=file at entry=0x7ffff69d597a "core/screen.c", line=line at entry=1206, func=func at entry=0x7ffff69d6480 <__func__.82463> "update_num_workspaces", message=message at entry=0xb262a0 "assertion failed: (w->windows == NULL)") at ././glib/gtestutils.c:2429
#3  0x00007ffff502a73a in g_assertion_message_expr (domain=domain at entry=0x7ffff69d4f7c "mutter", file=file at entry=0x7ffff69d597a "core/screen.c", line=line at entry=1206, func=func at entry=0x7ffff69d6480 <__func__.82463> "update_num_workspaces", expr=expr at entry=0x7ffff69d5a2c "w->windows == NULL") at ././glib/gtestutils.c:2452
#4  0x00007ffff6983a06 in update_num_workspaces (screen=0x851060 [MetaScreen], timestamp=246506) at core/screen.c:1206
#5  0x00007ffff697fcfb in emit_changed (pref=META_PREF_NUM_WORKSPACES) at core/prefs.c:884
#6  0x00007ffff697fd57 in changed_idle_handler (data=<optimized out>) at core/prefs.c:910
#7  0x00007ffff5004eaa in g_main_context_dispatch (context=0x64c340) at ././glib/gmain.c:3154
#8  0x00007ffff5004eaa in g_main_context_dispatch (context=context at entry=0x64c340) at ././glib/gmain.c:3769
#9  0x00007ffff5005260 in g_main_context_iterate (context=0x64c340, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3840
#10 0x00007ffff5005582 in g_main_loop_run (loop=0x899b30) at ././glib/gmain.c:4034
#11 0x00007ffff697d2ac in meta_run () at core/main.c:537
#12 0x0000000000402197 in main (argc=<optimized out>, argv=<optimized out>) at main.c:471
(gdb) call gjs_dumpstack ()
== Stack trace for context 0x663360 ==
[Thread 0x7fff9dffa700 (LWP 5162) exited]

Thread 1 "gnome-shell" received signal SIGSEGV, Segmentation fault.
JSAutoCompartment::JSAutoCompartment (this=0x7fffffffdae0, cx=0x95aa00, target=0x0) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsapi.cpp:1456
1456	/build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsapi.cpp: No such file or directory.
The program being debugged was signaled while in a function called from GDB.
GDB remains in the frame where the signal was received.
To change this behavior use "set unwindonsignal on".
Evaluation of the expression containing the function
(gjs_dumpstack) will be abandoned.
When the function is done executing, GDB will silently stop.
(gdb) quit
A debugging session is active.

	Inferior 1 [process 5006] will be killed.

Quit anyway? (y or n) y
jens at hope:~$ exit
exit