Bug 320469

Application: plasma-desktop (4.10.3)
KDE Platform Version: 4.10.3
Qt Version: 4.8.2
Operating System: Linux 3.9.3-tg x86_64
Distribution: Ubuntu 12.04.2 LTS

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

Performing a plain KDE shutdown. The crash happens every time.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f42c5bbf780 (LWP 3697))]

Thread 5 (Thread 0x7f42a7a2b700 (LWP 3698)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f42bedcf222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f42bedcf259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f42b9665e9a in start_thread (arg=0x7f42a7a2b700) at pthread_create.c:308
#4  0x00007f42c54afccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f429ef2f700 (LWP 3699)):
#0  0x00007f42b966905d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f4298000a60) at pthread_mutex_unlock.c:290
#2  0x00007f42b8fa45d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f42b8f6898b in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f42b8f68faa in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f42b8f69164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f42c201c926 in QEventDispatcherGlib::processEvents (this=0x7f42980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007f42c1febe62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f42c1fec0b7 in QEventLoop::exec (this=0x7f429ef2edd0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f42c1eeb077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007f42c1fcbb6f in QInotifyFileSystemWatcherEngine::run (this=0x274b180) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007f42c1eee09b in QThreadPrivate::start (arg=0x274b180) at thread/qthread_unix.cpp:307
#12 0x00007f42b9665e9a in start_thread (arg=0x7f429ef2f700) at pthread_create.c:308
#13 0x00007f42c54afccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f42966c9700 (LWP 3701)):
#0  0x00007f42c54a4313 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f42b8f69036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f42b8f6949a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f42971b3406 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f42b8f8a9e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f42b9665e9a in start_thread (arg=0x7f42966c9700) at pthread_create.c:308
#6  0x00007f42c54afccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f429480f700 (LWP 3704)):
#0  0x00007f42b8fa432a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f42b8fa45c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f42b8f6902a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f42b8f69164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f42c201c926 in QEventDispatcherGlib::processEvents (this=0x7f42800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f42c1febe62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f42c1fec0b7 in QEventLoop::exec (this=0x7f429480edd0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f42c1eeb077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00007f42c1fcbb6f in QInotifyFileSystemWatcherEngine::run (this=0x3270180) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f42c1eee09b in QThreadPrivate::start (arg=0x3270180) at thread/qthread_unix.cpp:307
#10 0x00007f42b9665e9a in start_thread (arg=0x7f429480f700) at pthread_create.c:308
#11 0x00007f42c54afccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f42c5bbf780 (LWP 3697)):
[KCrash Handler]
#6  0x00007f42c3c259ee in QDeclarativeItem::~QDeclarativeItem (this=0x4933a90, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f42c3be8af5 in ~QDeclarativeElement (this=0x4933a90, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x4933a90, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f42c2006978 in QObject::event (this=0x4933a90, e=<optimized out>) at kernel/qobject.cpp:1176
#10 0x00007f42c136e7b4 in notify_helper (e=0x3a7fca0, receiver=0x4933a90, this=0x1a80830) at kernel/qapplication.cpp:4556
#11 QApplicationPrivate::notify_helper (this=0x1a80830, receiver=0x4933a90, e=0x3a7fca0) at kernel/qapplication.cpp:4528
#12 0x00007f42c1373583 in QApplication::notify (this=0x1a6bfc0, receiver=0x4933a90, e=0x3a7fca0) at kernel/qapplication.cpp:4417
#13 0x00007f42c2cd4006 in KApplication::notify (this=0x1a6bfc0, receiver=0x4933a90, event=0x3a7fca0) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f42c1fed32c in QCoreApplication::notifyInternal (this=0x1a6bfc0, receiver=0x4933a90, event=0x3a7fca0) at kernel/qcoreapplication.cpp:915
#15 0x00007f42c1ff110a in sendEvent (event=0x3a7fca0, receiver=0x4933a90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x1a071f0) at kernel/qcoreapplication.cpp:1539
#17 0x00007f42c1ff143e in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1194
#18 0x00007f42c57b903f in kdemain (argc=1, argv=0x7fff7efb90b8) at ../../../../plasma/desktop/shell/main.cpp:126
#19 0x00007f42c53dd76d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff7efb90b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7efb90a8) at libc-start.c:226
#20 0x0000000000400671 in _start ()

Possible duplicates by query: bug 319473, bug 319189, bug 317212, bug 316830, bug 316547.

Reported using DrKonqi