Application: kwin (4.11.21)
KDE Platform Version: 4.14.10
Qt Version: 4.8.7
Operating System: Linux 3.11.0-sabayon x86_64
Distribution: "Sabayon Linux amd64 15.08"

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

I was running Eclipse from a remote machine (Ubuntu) on my local Linux (Sabayon). Sometimes when a tooltip goes away, kwin crashes. I've seen this off and on for over a year, with different Eclipses (at least Kepler and Mars) and different remote Linux flavors (CentOS and Ubuntu).

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f3201d36a98 in QObject::~QObject() () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f32075fe0f0 in KWin::Client::releaseWindow(bool) () from /usr/lib64/libkdeinit4_kwin.so
#7  0x00007f320762155a in KWin::Client::unmapNotifyEvent(XUnmapEvent*) () from /usr/lib64/libkdeinit4_kwin.so
#8  0x00007f3207623d93 in KWin::Client::windowEvent(_XEvent*) () from /usr/lib64/libkdeinit4_kwin.so
#9  0x00007f32076254d7 in KWin::Workspace::workspaceEvent(_XEvent*) () from /usr/lib64/libkdeinit4_kwin.so
#10 0x00007f3207616053 in KWin::Application::x11EventFilter(_XEvent*) () from /usr/lib64/libkdeinit4_kwin.so
#11 0x00007f3200db25bd in qt_x11EventFilter(_XEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#12 0x00007f3200dc0851 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#13 0x00007f3200dee4ed in QEventDispatcherX11::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtGui.so.4
#14 0x00007f3201d16a75 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007f3201d16ef5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#16 0x00007f3201d1d81a in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4
#17 0x00007f32076171f6 in kdemain () from /usr/lib64/libkdeinit4_kwin.so
#18 0x00007f32071f028b in __libc_start_main () from /lib64/libc.so.6
#19 0x00007f3207b85a39 in _start ()

Possible duplicates by query: bug 345181.

Reported using DrKonqi