Application: kwin (4.7.4 (4.7.4))
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic x86_64
Distribution: Ubuntu 11.10

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

I was trying to move around a paused VLC playback window, but KWin crashed.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f76ffd3f7a0 (LWP 1838))]

Thread 3 (Thread 0x7f76d76d5700 (LWP 1845)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f76d76d4ad0 in ?? ()
#2  0x00007fff2e1ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f76d6ed4700 (LWP 1846)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f76fe3d9fe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f76fe3da019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f76f5893efc in start_thread (arg=0x7f76d6ed4700) at pthread_create.c:304
#4  0x00007f76ff58189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f76ffd3f7a0 (LWP 1838)):
[KCrash Handler]
#6  QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively (this=<optimized out>) at graphicsview/qgraphicsitem.cpp:5379
#7  0x00007f76fb2d2443 in update (rect=..., this=0x24e11b0) at graphicsview/qgraphicsitem.cpp:5688
#8  QGraphicsItem::update (this=0x24e11b0, rect=...) at graphicsview/qgraphicsitem.cpp:5681
#9  0x00007f76e098a77d in ?? () from /usr/lib/kde4/kwin3_aurorae.so
#10 0x00007f76fb2cf7e3 in QGraphicsItem::sceneEvent (this=0x24e11b0, event=0x7fff2e130bd0) at graphicsview/qgraphicsitem.cpp:6730
#11 0x00007f76fb2f7c2a in QGraphicsScenePrivate::sendMouseEvent (this=0x29a4970, mouseEvent=0x7fff2e130bd0) at graphicsview/qgraphicsscene.cpp:1291
#12 0x00007f76fb2f85f5 in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fff2e130bd0) at graphicsview/qgraphicsscene.cpp:4121
#13 0x00007f76e0990539 in ?? () from /usr/lib/kde4/kwin3_aurorae.so
#14 0x00007f76fb30686f in QGraphicsScene::event (this=0x2b58290, event=0x7fff2e130bd0) at graphicsview/qgraphicsscene.cpp:3453
#15 0x00007f76fad08424 in notify_helper (e=0x7fff2e130bd0, receiver=0x2b58290, this=0x1ca7040) at kernel/qapplication.cpp:4486
#16 QApplicationPrivate::notify_helper (this=0x1ca7040, receiver=0x2b58290, e=0x7fff2e130bd0) at kernel/qapplication.cpp:4458
#17 0x00007f76fad0d291 in QApplication::notify (this=0x7fff2e131ef0, receiver=0x2b58290, e=0x7fff2e130bd0) at kernel/qapplication.cpp:4365
#18 0x00007f76ff06f466 in KApplication::notify (this=0x7fff2e131ef0, receiver=0x2b58290, event=0x7fff2e130bd0) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f76fb957afc in QCoreApplication::notifyInternal (this=0x7fff2e131ef0, receiver=0x2b58290, event=0x7fff2e130bd0) at kernel/qcoreapplication.cpp:787
#20 0x00007f76fb321f76 in QGraphicsView::mouseReleaseEvent (this=0x2afb390, event=0x7fff2e1313b0) at graphicsview/qgraphicsview.cpp:3336
#21 0x00007f76fad58c9a in QWidget::event (this=0x2afb390, event=0x7fff2e1313b0) at kernel/qwidget.cpp:8295
#22 0x00007f76fb1014f6 in QFrame::event (this=0x2afb390, e=0x7fff2e1313b0) at widgets/qframe.cpp:557
#23 0x00007f76fb324d3b in QGraphicsView::viewportEvent (this=0x2afb390, event=0x7fff2e1313b0) at graphicsview/qgraphicsview.cpp:2864
#24 0x00007f76fb957c88 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x2b56620, event=0x7fff2e1313b0) at kernel/qcoreapplication.cpp:902
#25 0x00007f76fad083ef in notify_helper (e=0x7fff2e1313b0, receiver=0x2b56620, this=0x1ca7040) at kernel/qapplication.cpp:4482
#26 QApplicationPrivate::notify_helper (this=0x1ca7040, receiver=0x2b56620, e=0x7fff2e1313b0) at kernel/qapplication.cpp:4458
#27 0x00007f76fad0dc6b in QApplication::notify (this=<optimized out>, receiver=0x2b56620, e=0x7fff2e1313b0) at kernel/qapplication.cpp:4047
#28 0x00007f76ff06f466 in KApplication::notify (this=0x7fff2e131ef0, receiver=0x2b56620, event=0x7fff2e1313b0) at ../../kdeui/kernel/kapplication.cpp:311
#29 0x00007f76fb957afc in QCoreApplication::notifyInternal (this=0x7fff2e131ef0, receiver=0x2b56620, event=0x7fff2e1313b0) at kernel/qcoreapplication.cpp:787
#30 0x00007f76fad093f2 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#31 QApplicationPrivate::sendMouseEvent (receiver=0x2b56620, event=0x7fff2e1313b0, alienWidget=0x0, nativeWidget=0x2b56620, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3146
#32 0x00007f76fad88945 in QETWidget::translateMouseEvent (this=0x2b56620, event=<optimized out>) at kernel/qapplication_x11.cpp:4568
#33 0x00007f76fad878be in QApplication::x11ProcessEvent (this=0x7fff2e131ef0, event=0x7fff2e131be0) at kernel/qapplication_x11.cpp:3690
#34 0x00007f76fadb0e2a in QEventDispatcherX11::processEvents (this=0x1c68f40, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#35 0x00007f76fb956cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#36 0x00007f76fb956ef7 in QEventLoop::exec (this=0x7fff2e131e30, flags=...) at kernel/qeventloop.cpp:201
#37 0x00007f76fb95b789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#38 0x00007f76ff89acf6 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#39 0x00007f76ff4c130d in __libc_start_main (main=0x400630, argc=3, ubp_av=0x7fff2e132558, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2e132548) at libc-start.c:226
#40 0x0000000000400661 in _start ()

This bug may be a duplicate of or related to bug 242165.

Possible duplicates by query: bug 288168, bug 284028, bug 280704, bug 279319, bug 271435.

Reported using DrKonqi