Application: kwin (4.10.2)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.8.6-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

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

When I unlocked my screen after autologin, I found KWin had already crashed. This was after a fresh boot.

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 0x7f3b97ebd780 (LWP 2499))]

Thread 3 (Thread 0x7f3b936bd700 (LWP 2508)):
[KCrash Handler]
#6  0x000000319b17640c in QCoreApplicationPrivate::sendPostedEvents (receiver=0x1d9d960, event_type=43, data=0x1dbc5f0) at kernel/qcoreapplication.cpp:1474
#7  0x00000031a28099dc in KActivities::Consumer::listActivities() const () from /usr/lib64/libkactivities.so.6
#8  0x00000036b5640304 in KWin::fetchActivityListAndCurrent (controller=0x1da8738) at /var/tmp/portage/kde-base/kwin-4.10.2/work/kwin-4.10.2/kwin/workspace.cpp:1405
#9  0x00000036b564b303 in QtConcurrent::StoredFunctorCall1<QPair<QString, QStringList>, QPair<QString, QStringList> (*)(KActivities::Controller*), KActivities::Controller*>::runFunctor (this=0x1e5dc10) at /usr/include/qt4/QtCore/qtconcurrentstoredfunctioncall.h:267
#10 0x00000036b564f786 in QtConcurrent::RunFunctionTask<QPair<QString, QStringList> >::run (this=0x1e5dc10) at /usr/include/qt4/QtCore/qtconcurrentrunbase.h:106
#11 0x000000319b06f1db in QThreadPoolThread::run (this=0x1dbc450) at concurrent/qthreadpool.cpp:107
#12 0x000000319b07b37c in QThreadPrivate::start (arg=0x1dbc450) at thread/qthread_unix.cpp:338
#13 0x0000003190807dff in start_thread () from /lib64/libpthread.so.0
#14 0x00000031900e701d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f3b91452700 (LWP 2522)):
#0  0x000000319080b8b4 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00000031b0582587 in ?? () from /usr/lib64/qt4/libQtScript.so.4
#2  0x00000031b05825b9 in ?? () from /usr/lib64/qt4/libQtScript.so.4
#3  0x0000003190807dff in start_thread () from /lib64/libpthread.so.0
#4  0x00000031900e701d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f3b97ebd780 (LWP 2499)):
#0  0x000000319080b8b4 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x000000319b07b8e3 in wait (time=18446744073709551615, this=0x1dbc3e0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1dbc2e8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x000000319b06e9af in QThreadPoolPrivate::waitForDone (this=0x1dbc260, msecs=msecs@entry=-1) at concurrent/qthreadpool.cpp:298
#4  0x000000319b07041d in QThreadPool::~QThreadPool (this=0x1dbc240, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:440
#5  0x000000319b070459 in QThreadPool::~QThreadPool (this=0x1dbc240, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:442
#6  0x000000319b070485 in QGlobalStaticDeleter<QThreadPool>::~QGlobalStaticDeleter (this=0x319b4cdfe8 <theInstance()::cleanup>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1948
#7  0x00000031900379e9 in __run_exit_handlers () from /lib64/libc.so.6
#8  0x0000003190037a65 in exit () from /lib64/libc.so.6
#9  0x00000036ad233e98 in qt_xio_errhandler () at kernel/qapplication_x11.cpp:772
#10 0x00000036ae0411f8 in KApplication::xioErrhandler (this=0x7fff07a5eca0, dpy=0x1c90750) at /var/tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kdeui/kernel/kapplication.cpp:419
#11 0x00000031930447ae in _XIOError (dpy=dpy@entry=0x1c90750) at /var/tmp/portage/x11-libs/libX11-1.5.0-r1/work/libX11-1.5.0/src/XlibInt.c:1618
#12 0x000000319304236d in _XEventsQueued (dpy=dpy@entry=0x1c90750, mode=mode@entry=2) at /var/tmp/portage/x11-libs/libX11-1.5.0-r1/work/libX11-1.5.0/src/xcb_io.c:365
#13 0x0000003193033c8b in XEventsQueued (dpy=0x1c90750, mode=2) at /var/tmp/portage/x11-libs/libX11-1.5.0-r1/work/libX11-1.5.0/src/Pending.c:43
#14 0x00000036ad26a242 in QEventDispatcherX11::processEvents (this=0x1c29ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:141
#15 0x000000319b171cdf in QEventLoop::processEvents (this=this@entry=0x7fff07a5e9a0, flags=...) at kernel/qeventloop.cpp:149
#16 0x000000319b171f60 in QEventLoop::exec (this=0x7fff07a5e9a0, flags=...) at kernel/qeventloop.cpp:204
#17 0x000000319b176ac8 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#18 0x00000036b5666d49 in kdemain (argc=3, argv=0x7fff07a5ede8) at /var/tmp/portage/kde-base/kwin-4.10.2/work/kwin-4.10.2/kwin/main.cpp:537
#19 0x00000031900219e5 in __libc_start_main () from /lib64/libc.so.6
#20 0x0000000000400771 in _start ()

This bug may be a duplicate of or related to bug 315453.

Possible duplicates by query: bug 317173, bug 315961, bug 313187.

Reported using DrKonqi