Application: kwin (4.9.95)
KDE Platform Version: 4.9.95
Qt Version: 4.8.3
Operating System: Linux 3.7.0-7-generic x86_64
Distribution: Ubuntu Raring Ringtail (development branch)

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

Kwin was crashed (again!) when I tried to change windows decor

The crash can be reproduced some of the time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc654c247c0 (LWP 1922))]

Thread 4 (Thread 0x7fc638805700 (LWP 1926)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:168
#1  0x00007fc650d29cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fc650d29d09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fc648853f9f in start_thread (arg=0x7fc638805700) at pthread_create.c:311
#4  0x00007fc6544370cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:114

Thread 3 (Thread 0x7fc62bfff700 (LWP 1939)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:168
#1  0x00007fc631ebd133 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2  0x00007fc648853f9f in start_thread (arg=0x7fc62bfff700) at pthread_create.c:311
#3  0x00007fc6544370cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:114

Thread 2 (Thread 0x7fc62af03700 (LWP 2051)):
#0  0x00007fc654430293 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc64f873023 in qt_safe_select (nfds=22, fdread=0x7fc624000ac8, fdwrite=0x7fc624000d60, fdexcept=0x7fc624000ff8, orig_timeout=0x0) at kernel/qcore_unix.cpp:83
#2  0x00007fc64f8779e4 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7fc624000910, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:223
#3  0x00007fc64f878572 in QEventDispatcherUNIX::processEvents (this=0x7fc6240008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#4  0x00007fc64f8462bf in QEventLoop::processEvents (this=this@entry=0x7fc62af02d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc64f846548 in QEventLoop::exec (this=0x7fc62af02d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc64f747b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fc64f8269af in QInotifyFileSystemWatcherEngine::run (this=0x26d0880) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fc64f74aaec in QThreadPrivate::start (arg=0x26d0880) at thread/qthread_unix.cpp:338
#9  0x00007fc648853f9f in start_thread (arg=0x7fc62af03700) at pthread_create.c:311
#10 0x00007fc6544370cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:114

Thread 1 (Thread 0x7fc654c247c0 (LWP 1922)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007fc6533b3dd7 in QDeclarativeItem::~QDeclarativeItem (this=0x23daca0, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007fc6533776ee in ~QDeclarativeElement (this=0x23daca0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x23daca0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007fc64f85c468 in QObject::event (this=0x23daca0, e=<optimized out>) at kernel/qobject.cpp:1176
#11 0x00007fc64ebeee9c in QApplicationPrivate::notify_helper (this=this@entry=0x1d55360, receiver=receiver@entry=0x23daca0, e=e@entry=0x28d2050) at kernel/qapplication.cpp:4562
#12 0x00007fc64ebf330a in QApplication::notify (this=0x7fff76d73b50, receiver=0x23daca0, e=0x28d2050) at kernel/qapplication.cpp:4423
#13 0x00007fc653f21836 in KApplication::notify (this=0x7fff76d73b50, receiver=0x23daca0, event=0x28d2050) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007fc64f84756e in QCoreApplication::notifyInternal (this=0x7fff76d73b50, receiver=receiver@entry=0x23daca0, event=event@entry=0x28d2050) at kernel/qcoreapplication.cpp:915
#15 0x00007fc64f84b3f1 in sendEvent (event=0x28d2050, receiver=0x23daca0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1cee1f0) at kernel/qcoreapplication.cpp:1539
#17 0x00007fc64ec9489c in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#18 QEventDispatcherX11::processEvents (this=0x1cefad0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#19 0x00007fc64f8462bf in QEventLoop::processEvents (this=this@entry=0x7fff76d73860, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007fc64f846548 in QEventLoop::exec (this=0x7fff76d73860, flags=...) at kernel/qeventloop.cpp:204
#21 0x00007fc64f84b708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#22 0x00007fc654768fba in kdemain (argc=1, argv=0x7fff76d73c98) at ../../kwin/main.cpp:537
#23 0x00007fc654361c15 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=1, ubp_av=0x7fff76d73c98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff76d73c88) at libc-start.c:227
#24 0x0000000000400701 in _start ()

Possible duplicates by query: bug 312230, bug 311110, bug 311018, bug 304617.

Reported using DrKonqi