[Bug 308927] New: System Settings crashed randomly in the background.

Ashlar atrystan at gmail.com
Wed Oct 24 14:02:03 BST 2012 

https://bugs.kde.org/show_bug.cgi?id=308927

            Bug ID: 308927
          Severity: crash
           Version: 1.0
          Priority: NOR
          Assignee: unassigned-bugs at kde.org
           Summary: System Settings crashed randomly in the background.
    Classification: Unclassified
                OS: Linux
          Reporter: atrystan at gmail.com
          Hardware: Compiled Sources
            Status: UNCONFIRMED
         Component: general
           Product: systemsettings

Application: systemsettings (1.0)
KDE Platform Version: 4.9.2 (Compiled from sources)
Qt Version: 4.8.3
Operating System: Linux 3.5.0-17-generic x86_64
Distribution: Ubuntu 12.10

-- Information about the crash:
- What I was doing when the application crashed:

Nothing. It was in the background and simply locked up, I was working in the
Users control panel at the moment.

The crash can be reproduced some of the time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc383cbf7c0 (LWP 3034))]

Thread 3 (Thread 0x7fc36602d700 (LWP 3068)):
#0  0x00007fc380ccb303 in __GI___poll (fds=<optimized out>, nfds=<optimized
out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc37a4afd84 in g_main_context_poll (n_fds=1, fds=0x7fc360002be0,
timeout=-1, context=0x7fc3600009d0, priority=<optimized out>) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3584
#2  g_main_context_iterate (context=context at entry=0x7fc3600009d0,
block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3285
#3  0x00007fc37a4afea4 in g_main_context_iteration (context=0x7fc3600009d0,
may_block=1) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3351
#4  0x00007fc38144bc16 in QEventDispatcherGlib::processEvents
(this=0x7fc3600008f0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007fc38141c2bf in QEventLoop::processEvents
(this=this at entry=0x7fc36602ccd0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fc38141c548 in QEventLoop::exec (this=0x7fc36602ccd0, flags=...) at
kernel/qeventloop.cpp:204
#7  0x00007fc38131db10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#8  0x00007fc3813fc9af in QInotifyFileSystemWatcherEngine::run (this=0x16c15f0)
at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fc381320aec in QThreadPrivate::start (arg=0x16c15f0) at
thread/qthread_unix.cpp:338
#10 0x00007fc375d7a764 in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#11 0x00007fc37a97ee9a in start_thread (arg=0x7fc36602d700) at
pthread_create.c:308
#12 0x00007fc380cd6cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc35ffff700 (LWP 3085)):
#0  0x00007fc380ce48f7 in pthread_mutex_unlock (mutex=0x19c8b40) at
forward.c:184
#1  0x00007fc37a4ecc61 in g_mutex_unlock (mutex=mutex at entry=0x19cad80) at
/build/buildd/glib2.0-2.34.0/./glib/gthread-posix.c:227
#2  0x00007fc37a4af066 in g_main_context_acquire (context=0x19cad80) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:2790
#3  0x00007fc37a4afc64 in g_main_context_iterate (context=0x19cad80,
block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3240
#4  0x00007fc37a4b01e2 in g_main_loop_run (loop=0x19cad10) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3484
#5  0x00007fc364eb63b6 in gdbus_shared_thread_func (user_data=0x19cad50) at
/build/buildd/glib2.0-2.34.0/./gio/gdbusprivate.c:277
#6  0x00007fc37a4d3645 in g_thread_proxy (data=0x19c7720) at
/build/buildd/glib2.0-2.34.0/./glib/gthread.c:797
#7  0x00007fc375d7a764 in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#8  0x00007fc37a97ee9a in start_thread (arg=0x7fc35ffff700) at
pthread_create.c:308
#9  0x00007fc380cd6cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc383cbf7c0 (LWP 3034)):
[KCrash Handler]
#5  data (this=0x68) at
../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#6  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at
../../include/QtCore/../../src/corelib/global/qglobal.h:2457
#7  d_func (this=0x60) at kernel/qabstractitemmodel.h:310
#8  QAbstractItemModel::beginInsertRows (this=0x60, parent=...,
first=-23990048, last=-23990048) at kernel/qabstractitemmodel.cpp:2414
#9  0x00007fc36535ee4e in
QLightDM::UsersModelPrivate::cb_userAdded(LightDMUserList*, LightDMUser*,
void*) () from /usr/lib/liblightdm-qt-2.so.0
#10 0x00007fc379b535c4 in g_cclosure_marshal_VOID__OBJECTv (closure=0x1a91eb0,
return_value=<optimized out>, instance=0x19b5000, args=<optimized out>,
marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x1a22fb0)
at /build/buildd/glib2.0-2.34.0/./gobject/gmarshal.c:1312
#11 0x00007fc379b50407 in _g_closure_invoke_va (closure=0x1a91eb0,
return_value=0x0, instance=0x19b5000, args=0x7fffbb09c0c8, n_params=1,
param_types=0x1a22fb0) at /build/buildd/glib2.0-2.34.0/./gobject/gclosure.c:840
#12 0x00007fc379b68df6 in g_signal_emit_valist (instance=0x19b5000,
signal_id=<optimized out>, detail=0, var_args=var_args at entry=0x7fffbb09c0c8) at
/build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3211
#13 0x00007fc379b69642 in g_signal_emit (instance=<optimized out>,
signal_id=<optimized out>, detail=<optimized out>) at
/build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3356
#14 0x00007fc365149c24 in ?? () from /usr/lib/liblightdm-gobject-1.so.0
#15 0x00007fc374ff8bb8 in ffi_call_unix64 () at ../src/x86/unix64.S:75
#16 0x00007fc374ff85c0 in ffi_call (cif=cif at entry=0x7fffbb09c400,
fn=fn at entry=0x7fc365149a00, rvalue=0x7fffbb09c360,
avalue=avalue at entry=0x7fffbb09c2e0) at ../src/x86/ffi64.c:492
#17 0x00007fc379b50a9b in g_cclosure_marshal_generic (closure=0x1a820e0,
return_gvalue=0x0, n_param_values=<optimized out>, param_values=<optimized
out>, invocation_hint=<optimized out>, marshal_data=0x7fc365149a00) at
/build/buildd/glib2.0-2.34.0/./gobject/gclosure.c:1454
#18 0x00007fc379b50140 in g_closure_invoke (closure=0x1a820e0,
return_value=0x0, n_param_values=4, param_values=0x7fffbb09c640,
invocation_hint=0x7fffbb09c5e0) at
/build/buildd/glib2.0-2.34.0/./gobject/gclosure.c:777
#19 0x00007fc379b61550 in signal_emit_unlocked_R (node=node at entry=0x19fd9e0,
detail=detail at entry=0, instance=instance at entry=0x19cd090,
emission_return=emission_return at entry=0x0,
instance_and_params=instance_and_params at entry=0x7fffbb09c640) at
/build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3551
#20 0x00007fc379b694af in g_signal_emit_valist (instance=0x19cd090,
signal_id=<optimized out>, detail=0, var_args=var_args at entry=0x7fffbb09c8c8) at
/build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3300
#21 0x00007fc379b69642 in g_signal_emit (instance=instance at entry=0x19cd090,
signal_id=<optimized out>, detail=detail at entry=0) at
/build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:3356
#22 0x00007fc364eb2a84 in on_signal_received (connection=<optimized out>,
sender_name=0x7fc358080400 ":1.13", object_path=<optimized out>,
interface_name=<optimized out>, signal_name=0x7fc3580806b0 "UserAdded",
parameters=0x7fc358086520, user_data=0x1a92290) at
/build/buildd/glib2.0-2.34.0/./gio/gdbusproxy.c:927
#23 0x00007fc364ea2705 in emit_signal_instance_in_idle_cb (data=0x7fc3580805a0)
at /build/buildd/glib2.0-2.34.0/./gio/gdbusconnection.c:3715
#24 0x00007fc37a4afab5 in g_main_dispatch (context=0x12df320) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:2715
#25 g_main_context_dispatch (context=context at entry=0x12df320) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3219
#26 0x00007fc37a4afde8 in g_main_context_iterate
(context=context at entry=0x12df320, block=block at entry=1,
dispatch=dispatch at entry=1, self=<optimized out>) at
/build/buildd/glib2.0-2.34.0/./glib/gmain.c:3290
#27 0x00007fc37a4afea4 in g_main_context_iteration (context=0x12df320,
may_block=1) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3351
#28 0x00007fc38144bbf6 in QEventDispatcherGlib::processEvents (this=0x1218ad0,
flags=...) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00007fc38211ec1e in QGuiEventDispatcherGlib::processEvents
(this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007fc38141c2bf in QEventLoop::processEvents
(this=this at entry=0x7fffbb09cc10, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007fc38141c548 in QEventLoop::exec (this=0x7fffbb09cc10, flags=...) at
kernel/qeventloop.cpp:204
#32 0x00007fc381421708 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1187
#33 0x000000000040a98e in ?? ()
#34 0x00007fc380c0476d in __libc_start_main (main=0x40a630, argc=5,
ubp_av=0x7fffbb09ce78, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffbb09ce68) at libc-start.c:226
#35 0x000000000040a9e5 in _start ()

Reported using DrKonqi

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