Bug 311963

Application: systemsettings (1.0)
KDE Platform Version: 4.9.3
Qt Version: 4.8.3
Operating System: Linux 3.5.0-21-generic i686
Distribution: Ubuntu 12.10

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

deleting an old user account using the user management apt in system settings

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1e8e740 (LWP 8030))]

Thread 3 (Thread 0xaea67b40 (LWP 8031)):
#0  0xb32b5dc8 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb5cef864 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb321eed0 in g_mutex_lock (mutex=mutex@entry=0xae1004e0) at /build/buildd/glib2.0-2.34.1/./glib/gthread-posix.c:208
#3  0xb31dd7cd in g_main_context_check (context=context@entry=0xae1004e0, max_priority=2147483647, fds=fds@entry=0xae102278, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3171
#4  0xb31ddc92 in g_main_context_iterate (context=context@entry=0xae1004e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3287
#5  0xb31dde61 in g_main_context_iteration (context=0xae1004e0, may_block=1) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3351
#6  0xb603299f in QEventDispatcherGlib::processEvents (this=0xae100468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0xb5fff26c in QEventLoop::processEvents (this=this@entry=0xaea67228, flags=...) at kernel/qeventloop.cpp:149
#8  0xb5fff561 in QEventLoop::exec (this=0xaea67228, flags=...) at kernel/qeventloop.cpp:204
#9  0xb5eea66c in QThread::exec (this=0x9d7e9e0) at thread/qthread.cpp:501
#10 0xb5fdd7bd in QInotifyFileSystemWatcherEngine::run (this=0x9d7e9e0) at io/qfilesystemwatcher_inotify.cpp:248
#11 0xb5eeda58 in QThreadPrivate::start (arg=0x9d7e9e0) at thread/qthread_unix.cpp:338
#12 0xb32b3d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#13 0xb5ce1d3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xad8c2b40 (LWP 8033)):
#0  0xb32b6c64 in __pthread_mutex_unlock_usercnt () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb5cef8a4 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb321ef10 in g_mutex_unlock (mutex=mutex@entry=0xa1ae850) at /build/buildd/glib2.0-2.34.1/./glib/gthread-posix.c:227
#3  0xb31dd69d in g_main_context_query (context=context@entry=0xa1ae850, max_priority=2147483647, timeout=timeout@entry=0xad8c224c, fds=fds@entry=0xacf02298, n_fds=3) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3089
#4  0xb31ddc5e in g_main_context_iterate (context=0xa1ae850, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3272
#5  0xb31de1db in g_main_loop_run (loop=0x9f0a3b0) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3484
#6  0xada28b7a in gdbus_shared_thread_func (user_data=0x9f54588) at /build/buildd/glib2.0-2.34.1/./gio/gdbusprivate.c:277
#7  0xb3203303 in g_thread_proxy (data=0xa0e7890) at /build/buildd/glib2.0-2.34.1/./glib/gthread.c:797
#8  0xb32b3d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#9  0xb5ce1d3e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb1e8e740 (LWP 8030)):
[KCrash Handler]
#7  0xadad68e7 in QLightDM::UsersModelPrivate::cb_userRemoved(LightDMUserList*, LightDMUser*, void*) () from /usr/lib/liblightdm-qt-2.so.0
#8  0xb307a8fc in g_cclosure_marshal_VOID__OBJECTv (closure=closure@entry=0x9974d88, return_value=return_value@entry=0x0, instance=instance@entry=0xa061490, args=args@entry=0xbfa2923c "@\314\034\n\004", marshal_data=marshal_data@entry=0x0, n_params=n_params@entry=1, param_types=param_types@entry=0x99711b8) at /build/buildd/glib2.0-2.34.1/./gobject/gmarshal.c:1312
#9  0xb3077ad1 in _g_closure_invoke_va (closure=0x9974d88, return_value=return_value@entry=0x0, instance=instance@entry=0xa061490, args=args@entry=0xbfa2923c "@\314\034\n\004", n_params=1, param_types=0x99711b8) at /build/buildd/glib2.0-2.34.1/./gobject/gclosure.c:840
#10 0xb3090e77 in g_signal_emit_valist (instance=instance@entry=0xa061490, signal_id=signal_id@entry=10, detail=detail@entry=0, var_args=var_args@entry=0xbfa2923c "@\314\034\n\004") at /build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:3211
#11 0xb30918b3 in g_signal_emit (instance=0xa061490, signal_id=10, detail=0) at /build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:3356
#12 0xadabf91a in ?? () from /usr/lib/liblightdm-gobject-1.so.0
#13 0xb25ee48e in ffi_call_SYSV () at ../src/x86/sysv.S:64
#14 0xb25ee1ef in ffi_call (cif=cif@entry=0xbfa293e4, fn=fn@entry=0xadabf7e0, rvalue=0xbfa29360, avalue=avalue@entry=0xbfa29300) at ../src/x86/ffi.c:413
#15 0xb307815c in g_cclosure_marshal_generic (closure=closure@entry=0x9969900, return_gvalue=return_gvalue@entry=0x0, n_param_values=n_param_values@entry=4, param_values=param_values@entry=0xbfa29590, invocation_hint=invocation_hint@entry=0xbfa2953c, marshal_data=marshal_data@entry=0x0) at /build/buildd/glib2.0-2.34.1/./gobject/gclosure.c:1454
#16 0xb3077826 in g_closure_invoke (closure=0x9969900, return_value=return_value@entry=0x0, n_param_values=4, param_values=param_values@entry=0xbfa29590, invocation_hint=invocation_hint@entry=0xbfa2953c) at /build/buildd/glib2.0-2.34.1/./gobject/gclosure.c:777
#17 0xb308961f in signal_emit_unlocked_R (node=node@entry=0x9ef4708, detail=detail@entry=0, instance=instance@entry=0xa033470, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0xbfa29590) at /build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:3551
#18 0xb3091732 in g_signal_emit_valist (instance=instance@entry=0xa033470, signal_id=signal_id@entry=5, detail=detail@entry=0, var_args=0xbfa297b8 "", var_args@entry=0xbfa297ac "") at /build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:3300
#19 0xb30918b3 in g_signal_emit (instance=instance@entry=0xa033470, signal_id=5, detail=detail@entry=0) at /build/buildd/glib2.0-2.34.1/./gobject/gsignal.c:3356
#20 0xada24c3f in on_signal_received (connection=0xa16d058, sender_name=0xacf01300 ":1.18", object_path=0xacf01328 "/org/freedesktop/Accounts", interface_name=0xacf2dd10 "org.freedesktop.Accounts", signal_name=0xacf2dfa8 "UserDeleted", parameters=0xacf3c080, user_data=0xa058a60) at /build/buildd/glib2.0-2.34.1/./gio/gdbusproxy.c:927
#21 0xada12c06 in emit_signal_instance_in_idle_cb (data=data@entry=0xacf2dbd0) at /build/buildd/glib2.0-2.34.1/./gio/gdbusconnection.c:3715
#22 0xb31dac30 in g_idle_dispatch (source=source@entry=0xacf02358, callback=0xada12b70 <emit_signal_instance_in_idle_cb>, user_data=0xacf2dbd0) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:4806
#23 0xb31dd9e3 in g_main_dispatch (context=0x9926ab0) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:2715
#24 g_main_context_dispatch (context=context@entry=0x9926ab0) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3219
#25 0xb31ddd80 in g_main_context_iterate (context=context@entry=0x9926ab0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3290
#26 0xb31dde61 in g_main_context_iteration (context=0x9926ab0, may_block=1) at /build/buildd/glib2.0-2.34.1/./glib/gmain.c:3351
#27 0xb603299f in QEventDispatcherGlib::processEvents (this=0x98f9ea0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#28 0xb66a39aa in QGuiEventDispatcherGlib::processEvents (this=0x98f9ea0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0xb5fff26c in QEventLoop::processEvents (this=this@entry=0xbfa29a58, flags=...) at kernel/qeventloop.cpp:149
#30 0xb5fff561 in QEventLoop::exec (this=0xbfa29a58, flags=...) at kernel/qeventloop.cpp:204
#31 0xb6004cba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#32 0xb65eafc4 in QApplication::exec () at kernel/qapplication.cpp:3823
#33 0x08050422 in main (argc=5, argv=0xbfa29c04) at ../../../systemsettings/app/main.cpp:49

Reported using DrKonqi