Application: kwin (4.10.00)
KDE Platform Version: 4.10.00
Qt Version: 4.8.4
Operating System: Linux 3.8.0-5-generic x86_64
Distribution: Ubuntu Raring Ringtail (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to change the the window borders and the size of buttons
- Unusual behavior I noticed:
the button theme was changed 
- Custom settings of the application:
none

-- 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 0x7f0dd52587c0 (LWP 2821))]

Thread 3 (Thread 0x7f0db8fa3700 (LWP 2824)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0dd1356e97 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f0dd1356ec9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f0dc8e7cf8e in start_thread (arg=0x7f0db8fa3700) at pthread_create.c:311
#4  0x00007f0dd4a66e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f0db3345700 (LWP 2827)):
#0  0x00007f0dd4a5f233 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0dcfe9b4c3 in qt_safe_select (nfds=16, fdread=0x7f0dac000ac8, fdwrite=0x7f0dac000d60, fdexcept=0x7f0dac000ff8, orig_timeout=0x0) at kernel/qcore_unix.cpp:83
#2  0x00007f0dcfea0469 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f0dac000910, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:223
#3  0x00007f0dcfea0c52 in QEventDispatcherUNIX::processEvents (this=0x7f0dac0008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:937
#4  0x00007f0dcfe6e34f in QEventLoop::processEvents (this=this@entry=0x7f0db3344d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0dcfe6e5d8 in QEventLoop::exec (this=0x7f0db3344d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f0dcfd703e0 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f0dcfe4fe9f in QInotifyFileSystemWatcherEngine::run (this=0x13f8710) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f0dcfd72bbc in QThreadPrivate::start (arg=0x13f8710) at thread/qthread_unix.cpp:338
#9  0x00007f0dc8e7cf8e in start_thread (arg=0x7f0db3345700) at pthread_create.c:311
#10 0x00007f0dd4a66e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f0dd52587c0 (LWP 2821)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f0dd39df947 in QDeclarativeItem::~QDeclarativeItem (this=0x1ab6a50, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007f0dd39a410e in ~QDeclarativeElement (this=0x1ab6a50, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x1ab6a50, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f0dcfe895b8 in QObject::event (this=0x1ab6a50, e=<optimized out>) at kernel/qobject.cpp:1175
#11 0x00007f0dcf2158ec in QApplicationPrivate::notify_helper (this=this@entry=0xf6b240, receiver=receiver@entry=0x1ab6a50, e=e@entry=0x1a35970) at kernel/qapplication.cpp:4567
#12 0x00007f0dcf21825b in QApplication::notify (this=0x7ffff45c3bd0, receiver=0x1ab6a50, e=0x1a35970) at kernel/qapplication.cpp:4428
#13 0x00007f0dd4551666 in KApplication::notify (this=0x7ffff45c3bd0, receiver=0x1ab6a50, event=0x1a35970) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f0dcfe6f5fe in QCoreApplication::notifyInternal (this=0x7ffff45c3bd0, receiver=receiver@entry=0x1ab6a50, event=event@entry=0x1a35970) at kernel/qcoreapplication.cpp:946
#15 0x00007f0dcfe731f1 in sendEvent (event=0x1a35970, receiver=0x1ab6a50) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xf051f0) at kernel/qcoreapplication.cpp:1570
#17 0x00007f0dcf2bb9fc in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#18 QEventDispatcherX11::processEvents (this=0xf06ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#19 0x00007f0dcfe6e34f in QEventLoop::processEvents (this=this@entry=0x7ffff45c38e0, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007f0dcfe6e5d8 in QEventLoop::exec (this=0x7ffff45c38e0, flags=...) at kernel/qeventloop.cpp:204
#21 0x00007f0dcfe73cc6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#22 0x00007f0dd4d9cc6a in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#23 0x00007f0dd498eea5 in __libc_start_main (main=0x4006d0, argc=3, ubp_av=0x7ffff45c3d18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff45c3d08) at libc-start.c:260
#24 0x0000000000400701 in _start ()

Possible duplicates by query: bug 314758, bug 314737, bug 314716, bug 314606, bug 314508.

Reported using DrKonqi