Application: kwin (4.10.00)
KDE Platform Version: 4.10.00
Qt Version: 4.8.2
Operating System: Linux 3.2.0-37-generic x86_64
Distribution: Ubuntu 12.04.2 LTS

-- Information about the crash:
- It appears the crash happens when changing window decorations to anything that is "translucent".

-- 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 0x7f7e6d75f7c0 (LWP 10575))]

Thread 3 (Thread 0x7f7e515eb700 (LWP 10578)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f7e69825222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f7e69825259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f7e61076e9a in start_thread (arg=0x7f7e515eb700) at pthread_create.c:308
#4  0x00007f7e6cf66cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f7e4bb7c700 (LWP 10581)):
#0  0x00007fff7c35b8de in ?? ()
#1  0x00007f7e61ca515d in __GI_clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:116
#2  0x00007f7e682dac64 in do_gettime (frac=0x7f7e4bb7bb18, sec=0x7f7e4bb7bb10) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f7e683b306d in QTimerInfoList::updateCurrentTime (this=0x7f7e44001178) at kernel/qeventdispatcher_unix.cpp:343
#5  0x00007f7e683b4956 in QEventDispatcherUNIXPrivate::doSelect (this=0x7f7e44000910, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:186
#6  0x00007f7e683b5183 in QEventDispatcherUNIX::processEvents (this=0x7f7e440008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#7  0x00007f7e68381e42 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f7e68382097 in QEventLoop::exec (this=0x7f7e4bb7bd90, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f7e68281057 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007f7e68361b4f in QInotifyFileSystemWatcherEngine::run (this=0x2383670) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007f7e6828407b in QThreadPrivate::start (arg=0x2383670) at thread/qthread_unix.cpp:307
#12 0x00007f7e61076e9a in start_thread (arg=0x7f7e4bb7c700) at pthread_create.c:308
#13 0x00007f7e6cf66cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7e6d75f7c0 (LWP 10575)):
[KCrash Handler]
#6  0x000000000000001e in ?? ()
#7  0x00007f7e6bea79f1 in QDeclarativeItem::~QDeclarativeItem (this=0x212f720, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007f7e6be6aaf5 in ~QDeclarativeElement (this=0x212f720, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x212f720, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f7e6839c958 in QObject::event (this=0x212f720, e=<optimized out>) at kernel/qobject.cpp:1176
#11 0x00007f7e677047b4 in notify_helper (e=0x27d0660, receiver=0x212f720, this=0x1e00d70) at kernel/qapplication.cpp:4556
#12 QApplicationPrivate::notify_helper (this=0x1e00d70, receiver=0x212f720, e=0x27d0660) at kernel/qapplication.cpp:4528
#13 0x00007f7e67709583 in QApplication::notify (this=0x7fff7c2c3d70, receiver=0x212f720, e=0x27d0660) at kernel/qapplication.cpp:4417
#14 0x00007f7e6ca3eb76 in KApplication::notify (this=0x7fff7c2c3d70, receiver=0x212f720, event=0x27d0660) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f7e6838330c in QCoreApplication::notifyInternal (this=0x7fff7c2c3d70, receiver=0x212f720, event=0x27d0660) at kernel/qcoreapplication.cpp:915
#16 0x00007f7e683870ea in sendEvent (event=0x27d0660, receiver=0x212f720) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1d9d1f0) at kernel/qcoreapplication.cpp:1539
#18 0x00007f7e677ad97a in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#19 QEventDispatcherX11::processEvents (this=0x1d9ead0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#20 0x00007f7e68381e42 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#21 0x00007f7e68382097 in QEventLoop::exec (this=0x7fff7c2c3cf0, flags=...) at kernel/qeventloop.cpp:204
#22 0x00007f7e683873e7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#23 0x00007f7e6d29acbb in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:537
#24 0x00007f7e6ce9476d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=3, ubp_av=0x7fff7c2c4468, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff7c2c4458) at libc-start.c:226
#25 0x0000000000400671 in _start ()

Possible duplicates by query: bug 314508, bug 314445, bug 313132, bug 312399, bug 312230.

Reported using DrKonqi