Application: kwin (4.6.2 (4.6.2))
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

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

Right click on title bare, then tried to move a window to a group, then desktop crashed and restarted.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4f601ee7c0 (LWP 6066))]

Thread 3 (Thread 0x7f4f3a14d700 (LWP 6076)):
#0  0x00007f4f5fa3b143 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f4f5bd8a32c in qt_safe_select (nfds=26, fdread=0x212f730, fdwrite=0x212f9c8, fdexcept=0x212fc60, orig_timeout=<value optimized out>) at kernel/qcore_unix.cpp:82
#2  0x00007f4f5bd8f3d0 in QEventDispatcherUNIXPrivate::doSelect (this=0x212f570, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:219
#3  0x00007f4f5bd9004a in QEventDispatcherUNIX::processEvents (this=0x212ef70, flags=...) at kernel/qeventdispatcher_unix.cpp:919
#4  0x00007f4f5bd61882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4f5bd61abc in QEventLoop::exec (this=0x7f4f3a14ccd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f4f5bc78924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007f4f5bd43c2f in QInotifyFileSystemWatcherEngine::run (this=0x212e350) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f4f5bc7b175 in QThreadPrivate::start (arg=0x212e350) at thread/qthread_unix.cpp:320
#9  0x00007f4f5d29d853 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f4f5636ed8c in start_thread (arg=0x7f4f3a14d700) at pthread_create.c:304
#11 0x00007f4f5fa4304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4f3994c700 (LWP 6077)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f4f5e8a22a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f4f5ebbb180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f4f5e8a22d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f4f5ebc9254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f4f5d29d853 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007f4f5636ed8c in start_thread (arg=0x7f4f3994c700) at pthread_create.c:304
#5  0x00007f4f5fa4304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4f601ee7c0 (LWP 6066)):
[KCrash Handler]
#6  0x00007f4f5ef1a522 in Plasma::Corona::popupPosition (this=0x2244280, item=0x241b3c0, s=..., alignment=<value optimized out>) at ../../plasma/corona.cpp:578
#7  0x00007f4f5efb7884 in Plasma::ToolTipManagerPrivate::showToolTip (this=0x21de9f0) at ../../plasma/tooltipmanager.cpp:399
#8  0x00007f4f5efb7c25 in Plasma::ToolTipManager::qt_metacall (this=0x21ded90, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff253b8aa0) at ./tooltipmanager.moc:88
#9  0x00007f4f5bd775f8 in QMetaObject::activate (sender=0x21d9b00, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3287
#10 0x00007f4f5bd761c9 in QObject::event (this=0x21d9b00, e=<value optimized out>) at kernel/qobject.cpp:1190
#11 0x00007f4f5b1239e4 in QApplicationPrivate::notify_helper (this=0x1961730, receiver=0x21d9b00, e=0x7fff253b91a0) at kernel/qapplication.cpp:4462
#12 0x00007f4f5b1283aa in QApplication::notify (this=<value optimized out>, receiver=0x21d9b00, e=0x7fff253b91a0) at kernel/qapplication.cpp:4341
#13 0x00007f4f5f53e866 in KApplication::notify (this=0x7fff253b95a0, receiver=0x21d9b00, event=0x7fff253b91a0) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f4f5bd6249c in QCoreApplication::notifyInternal (this=0x7fff253b95a0, receiver=0x21d9b00, event=0x7fff253b91a0) at kernel/qcoreapplication.cpp:731
#15 0x00007f4f5bd8ff12 in sendEvent (this=0x19652e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#16 QTimerInfoList::activateTimers (this=0x19652e0) at kernel/qeventdispatcher_unix.cpp:604
#17 0x00007f4f5bd9005b in QEventDispatcherUNIX::processEvents (this=0x18c7340, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#18 0x00007f4f5b1cbc0c in QEventDispatcherX11::processEvents (this=0x18c7340, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#19 0x00007f4f5bd61882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007f4f5bd61abc in QEventLoop::exec (this=0x7fff253b94e0, flags=...) at kernel/qeventloop.cpp:201
#21 0x00007f4f5bd65ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#22 0x00007f4f5fd4a1ec in kdemain (argc=<value optimized out>, argv=0x7fff253b9c38) at ../../kwin/main.cpp:542
#23 0x00007f4f5f97beff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=3, ubp_av=0x7fff253b9c38, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff253b9c28) at libc-start.c:226
#24 0x0000000000400669 in _start ()

Possible duplicates by query: bug 271482, bug 270051, bug 267726, bug 264649.

Reported using DrKonqi