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

Jens Reyer jre.winesim at gmail.com
Wed Aug 31 17:41:41 UTC 2016 

Control: found -1 3.21.91-1

Hi Andreas

I updated my system as requested (had to uninstall the gnome metapackage
and some extensions).

I can still reproduce this for my regular user with mutter/gnome-shell
3.21.91-1, see attachment. All extensions were disabled.

However it now works for a fresh user. Note that in the past I could
reproduce this on two machines, even for fresh users, see buglog.

At least GNOME now (at least since 3.20) doesn't disable all extensions
automatically anymore after a crash :)

Greets
jre
-------------- next part --------------
. xenv.sh
jens at hope:~$ gdb --args /usr/bin/gnome-shell --replace
GNU gdb (Debian 7.11.1-2) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from /usr/bin/gnome-shell...Reading symbols from /usr/lib/debug/.build-id/78/afdb18f04b732ec496f2beb1489f0c899b0a41.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 0x7fffdfaf1700 (LWP 4728)]
[New Thread 0x7fffdd0fe700 (LWP 4743)]
[New Thread 0x7fffdc8fd700 (LWP 4744)]
[New Thread 0x7fffcfdf2700 (LWP 4745)]
[New Thread 0x7fffcf3e9700 (LWP 4748)]
[New Thread 0x7fffcebe8700 (LWP 4749)]
[New Thread 0x7fffce3e7700 (LWP 4750)]
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 4760)]
[New Thread 0x7fffaaf33700 (LWP 4766)]
[Thread 0x7fffdc8fd700 (LWP 4744) exited]
[Thread 0x7fffabfff700 (LWP 4760) exited]
[New Thread 0x7fffabfff700 (LWP 4768)]
[New Thread 0x7fffdc8fd700 (LWP 4769)]
[New Thread 0x7fffa8b9c700 (LWP 4770)]
[New Thread 0x7fff9fffe700 (LWP 4771)]
[New Thread 0x7fff9f7fd700 (LWP 4772)]
[New Thread 0x7fff9effc700 (LWP 4773)]
[Thread 0x7fff9effc700 (LWP 4773) exited]
[Thread 0x7fffa8b9c700 (LWP 4770) exited]
[Thread 0x7fffaaf33700 (LWP 4766) exited]
[Thread 0x7fff9fffe700 (LWP 4771) exited]
[New Thread 0x7fff9fffe700 (LWP 4801)]
[New Thread 0x7fffaaf33700 (LWP 4802)]
[New Thread 0x7fffa8b9c700 (LWP 4803)]
[New Thread 0x7fff9effc700 (LWP 4804)]
[New Thread 0x7fff9e7fb700 (LWP 4805)]
[Thread 0x7fff9e7fb700 (LWP 4805) exited]
[Thread 0x7fff9effc700 (LWP 4804) exited]
[Thread 0x7fffa8b9c700 (LWP 4803) exited]
[Thread 0x7fffaaf33700 (LWP 4802) exited]
[Thread 0x7fff9f7fd700 (LWP 4772) exited]
[Thread 0x7fffdc8fd700 (LWP 4769) exited]
[Thread 0x7fff9fffe700 (LWP 4801) exited]
**
mutter:ERROR:core/screen.c:1206:update_num_workspaces: assertion failed: (w->windows == NULL)

Thread 1 "gnome-shell" received signal SIGABRT, Aborted.
0x00007ffff4a03198 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 11 (Thread 0x7fffabfff700 (LWP 4768)):
#0  0x00007ffff4ab2d49 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff501df7a in g_cond_wait_until (cond=cond at entry=0x88a248, mutex=mutex at entry=0x88a240, end_time=end_time at entry=227780230) at ././glib/gthread-posix.c:1442
#2  0x00007ffff4face39 in g_async_queue_pop_intern_unlocked (queue=queue at entry=0x88a240, wait=wait at entry=1, end_time=end_time at entry=227780230) at ././glib/gasyncqueue.c:422
#3  0x00007ffff4fad45c in g_async_queue_timeout_pop (queue=0x88a240, timeout=timeout at entry=15000000) at ././glib/gasyncqueue.c:543
#4  0x00007ffff50009cd in g_thread_pool_thread_proxy () at ././glib/gthreadpool.c:167
#5  0x00007ffff50009cd in g_thread_pool_thread_proxy (data=<optimized out>) at ././glib/gthreadpool.c:364
#6  0x00007ffff4ffff05 in g_thread_proxy (data=0x2c16450) at ././glib/gthread.c:784
#7  0x00007ffff4d78444 in start_thread (arg=0x7fffabfff700) at pthread_create.c:333
#8  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fffce3e7700 (LWP 4750)):
#0  0x00007ffff4d7e07f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe6582d70 in PR_WaitCondVar (cvar=0x9c6eb0, timeout=timeout at entry=4294967295) at ptsynch.c:396
#2  0x00007ffff06d0536 in js::SourceCompressorThread::compressorThread(void*) (this=0xb5f458) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsscript.cpp:1094
#3  0x00007ffff06d0536 in js::SourceCompressorThread::compressorThread(void*) (arg=0xb5f458) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsscript.cpp:965
#4  0x00007fffe6588758 in _pt_root (arg=0x97d100) at ptthread.c:216
#5  0x00007ffff4d78444 in start_thread (arg=0x7fffce3e7700) at pthread_create.c:333
#6  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fffcebe8700 (LWP 4749)):
#0  0x00007ffff4d7e07f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe6582d70 in PR_WaitCondVar (cvar=0x9ebc70, timeout=timeout at entry=4294967295) at ptsynch.c:396
#2  0x00007ffff065d15e in js::GCHelperThread::threadLoop() (this=0xb5f378) at /build/mozjs24-UQFbnn/mozjs24-24.2.0/js/src/jsgc.cpp:2266
#3  0x00007fffe6588758 in _pt_root (arg=0x9c4aa0) at ptthread.c:216
#4  0x00007ffff4d78444 in start_thread (arg=0x7fffcebe8700) at pthread_create.c:333
#5  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fffcf3e9700 (LWP 4748)):
#0  0x00007ffff4aae09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff0c3d9e1 in poll_func (__timeout=-1, __nfds=3, __fds=0x7fffbc006c50) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  0x00007ffff0c3d9e1 in poll_func (ufds=0x7fffbc006c50, nfds=3, timeout=-1, userdata=0x98afa0) at pulse/thread-mainloop.c:69
#3  0x00007ffff0c2f1b1 in pa_mainloop_poll (m=m at entry=0x9d4d00) at pulse/mainloop.c:844
#4  0x00007ffff0c2f84e in pa_mainloop_iterate (m=0x9d4d00, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007ffff0c2f900 in pa_mainloop_run (m=0x9d4d00, retval=retval at entry=0x0) at pulse/mainloop.c:944
#6  0x00007ffff0c3d929 in thread (userdata=0x98af60) at pulse/thread-mainloop.c:100
#7  0x00007fffe700e908 in internal_thread_func (userdata=0x9b8480) at pulsecore/thread-posix.c:81
#8  0x00007ffff4d78444 in start_thread (arg=0x7fffcf3e9700) at pthread_create.c:333
#9  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fffcfdf2700 (LWP 4745)):
#0  0x00007ffff4aae09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff4fd8896 in g_main_context_iterate (priority=<optimized out>, n_fds=1, fds=0x7fffc80010c0, timeout=<optimized out>, context=0x8a3580) at ././glib/gmain.c:4226
#2  0x00007ffff4fd8896 in g_main_context_iterate (context=context at entry=0x8a3580, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3922
#3  0x00007ffff4fd89ac in g_main_context_iteration (context=context at entry=0x8a3580, may_block=may_block at entry=1) at ././glib/gmain.c:3988
#4  0x00007fffcfdfa41d in dconf_gdbus_worker_thread (user_data=0x8a3580) at dconf-gdbus-thread.c:82
#5  0x00007ffff4ffff05 in g_thread_proxy (data=0x7fffd00046d0) at ././glib/gthread.c:784
#6  0x00007ffff4d78444 in start_thread (arg=0x7fffcfdf2700) at pthread_create.c:333
#7  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fffdd0fe700 (LWP 4743)):
#0  0x00007ffff4aae09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff4fd8896 in g_main_context_iterate (priority=<optimized out>, n_fds=3, fds=0x7fffd00010c0, timeout=<optimized out>, context=0x88bbe0) at ././glib/gmain.c:4226
#2  0x00007ffff4fd8896 in g_main_context_iterate (context=0x88bbe0, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3922
---Type <return> to continue, or q <return> to quit---
#3  0x00007ffff4fd8c22 in g_main_loop_run (loop=0x88bb70) at ././glib/gmain.c:4123
#4  0x00007ffff55be4f6 in gdbus_shared_thread_func (user_data=0x88bbb0) at ././gio/gdbusprivate.c:247
#5  0x00007ffff4ffff05 in g_thread_proxy (data=0x64b940) at ././glib/gthread.c:784
#6  0x00007ffff4d78444 in start_thread (arg=0x7fffdd0fe700) at pthread_create.c:333
#7  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fffdfaf1700 (LWP 4728)):
#0  0x00007ffff4aae09d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffff4fd8896 in g_main_context_iterate (priority=<optimized out>, n_fds=2, fds=0x7fffd80008e0, timeout=<optimized out>, context=0x64b4c0) at ././glib/gmain.c:4226
#2  0x00007ffff4fd8896 in g_main_context_iterate (context=context at entry=0x64b4c0, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3922
#3  0x00007ffff4fd89ac in g_main_context_iteration (context=0x64b4c0, may_block=may_block at entry=1) at ././glib/gmain.c:3988
#4  0x00007ffff4fd89f1 in glib_worker_main (data=<optimized out>) at ././glib/gmain.c:5781
#5  0x00007ffff4ffff05 in g_thread_proxy (data=0x64b800) at ././glib/gthread.c:784
#6  0x00007ffff4d78444 in start_thread (arg=0x7fffdfaf1700) at pthread_create.c:333
#7  0x00007ffff4ab720d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffff7edba80 (LWP 4716)):
#0  0x00007ffff4a03198 in __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007ffff4a0461a in __GI_abort () at abort.c:89
#2  0x00007ffff4fff0d5 in g_assertion_message (domain=domain at entry=0x7ffff67bf27c "mutter", file=file at entry=0x7ffff67bfc7a "core/screen.c", line=line at entry=1206, func=func at entry=0x7ffff67c0780 <__func__.102764> "update_num_workspaces", message=message at entry=0x2e2d940 "assertion failed: (w->windows == NULL)") at ././glib/gtestutils.c:2429
#3  0x00007ffff4fff16a in g_assertion_message_expr (domain=domain at entry=0x7ffff67bf27c "mutter", file=file at entry=0x7ffff67bfc7a "core/screen.c", line=line at entry=1206, func=func at entry=0x7ffff67c0780 <__func__.102764> "update_num_workspaces", expr=expr at entry=0x7ffff67bfd2c "w->windows == NULL") at ././glib/gtestutils.c:2452
#4  0x00007ffff6762be6 in update_num_workspaces (screen=0x7a2400 [MetaScreen], timestamp=217475) at core/screen.c:1206
#5  0x00007ffff675eebb in emit_changed (pref=META_PREF_NUM_WORKSPACES) at core/prefs.c:884
#6  0x00007ffff675ef17 in changed_idle_handler (data=<optimized out>) at core/prefs.c:910
#7  0x00007ffff4fd854a in g_main_context_dispatch (context=0x64c000) at ././glib/gmain.c:3201
#8  0x00007ffff4fd854a in g_main_context_dispatch (context=context at entry=0x64c000) at ././glib/gmain.c:3854
#9  0x00007ffff4fd8900 in g_main_context_iterate (context=0x64c000, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ././glib/gmain.c:3927
#10 0x00007ffff4fd8c22 in g_main_loop_run (loop=0x8b2490) at ././glib/gmain.c:4123
#11 0x00007ffff675c31c in meta_run () at core/main.c:572
#12 0x00000000004021c7 in main (argc=<optimized out>, argv=<optimized out>) at main.c:471
(gdb) call gjs_dumpstack ()
== Stack trace for context 0x663360 ==
[Thread 0x7fffabfff700 (LWP 4768) exited]

Thread 1 "gnome-shell" received signal SIGSEGV, Segmentation fault.
JSAutoCompartment::JSAutoCompartment (this=0x7fffffffdae0, cx=0x95b630, 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 4716] will be killed.

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

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