Bug 322682

Application: kwin (4.10.5 "release 1")
KDE Platform Version: 4.10.5 "release 1"
Qt Version: 4.8.4
Operating System: Linux 3.7.10-1.16-desktop x86_64
Distribution: "openSUSE 12.3 (x86_64)"

-- Information about the crash:
I used the effect of office 'stacking context' I turn in the corner of the desktop with the mouse, I appuiyais the shortened 'Tab' to change the window when the crash occurred KWin

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb757c667c0 (LWP 3492))]

Thread 2 (Thread 0x7fb72bfff700 (LWP 3509)):
#0  0x00007fb75240d964 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fb753d5c307 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7fb754069660 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fb753d5c339 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fb752409e0f in start_thread () from /lib64/libpthread.so.0
#4  0x00007fb7574807dd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fb757c667c0 (LWP 3492)):
[KCrash Handler]
#5  KWin::EffectsHandlerImpl::setTabBoxWindow (this=0x1018f20, w=0x0) at /usr/src/debug/kde-workspace-4.10.5/kwin/effects.cpp:1903
#6  0x00007fb738a33e60 in selectNextOrPreviousWindow (forward=<optimized out>, this=<optimized out>) at /usr/src/debug/kde-workspace-4.10.5/kwin/effects/flipswitch/flipswitch.cpp:852
#7  KWin::FlipSwitchEffect::selectNextOrPreviousWindow (this=<optimized out>, forward=<optimized out>) at /usr/src/debug/kde-workspace-4.10.5/kwin/effects/flipswitch/flipswitch.cpp:832
#8  0x00007fb75781f8e1 in KWin::EffectsHandlerImpl::checkInputWindowEvent (this=<optimized out>, e=0x7fffedfdc130) at /usr/src/debug/kde-workspace-4.10.5/kwin/effects.cpp:1069
#9  0x00007fb7577bb6b9 in KWin::Workspace::workspaceEvent (this=0x9f06b0, e=0x7fffedfdc130) at /usr/src/debug/kde-workspace-4.10.5/kwin/events.cpp:252
#10 0x00007fb7577ad6c8 in KWin::Application::x11EventFilter (this=0x7fffedfdc690, e=0x7fffedfdc130) at /usr/src/debug/kde-workspace-4.10.5/kwin/main.cpp:362
#11 0x00007fb751995bfc in qt_x11EventFilter (ev=0x7fffedfdc130) at kernel/qapplication_x11.cpp:435
#12 qt_x11EventFilter (ev=0x7fffedfdc130) at kernel/qapplication_x11.cpp:423
#13 0x00007fb7519a31eb in QApplication::x11ProcessEvent (this=0x7fffedfdc690, event=0x7fffedfdc130) at kernel/qapplication_x11.cpp:3362
#14 0x00007fb7519ca9d9 in QEventDispatcherX11::processEvents (this=0x7c3a70, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#15 0x00007fb75279aadf in QEventLoop::processEvents (this=this@entry=0x7fffedfdc3a0, flags=...) at kernel/qeventloop.cpp:149
#16 0x00007fb75279ad68 in QEventLoop::exec (this=0x7fffedfdc3a0, flags=...) at kernel/qeventloop.cpp:204
#17 0x00007fb75279fa08 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#18 0x00007fb7577afd1a in kdemain (argc=3, argv=0x7fffedfdc7d8) at /usr/src/debug/kde-workspace-4.10.5/kwin/main.cpp:537
#19 0x00007fb7573b9a15 in __libc_start_main () from /lib64/libc.so.6
#20 0x0000000000400761 in _start () at ../sysdeps/x86_64/start.S:123

Possible duplicates by query: bug 316288.

Reported using DrKonqi