Application: kwin (4.11.8)
KDE Platform Version: 4.12.95
Qt Version: 4.8.6
Operating System: Linux 3.13.0-20-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

-- Information about the crash:
I pressed Alt+Shift+F11 to activate compisiting and kwin crashed with the error below

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f23df5e6800 (LWP 1895))]

Thread 3 (Thread 0x7f23c0be9700 (LWP 2959)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f23ddfacffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f23ddfad039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f23d6b52182 in start_thread (arg=0x7f23c0be9700) at pthread_create.c:312
#4  0x00007f23dedbe30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f233a46c700 (LWP 2960)):
#0  0x00007ffff27a3a1f in ?? ()
#1  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f23df5e6800 (LWP 1895)):
[KCrash Handler]
#6  0x00007f23decf9f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007f23decfd388 in __GI_abort () at abort.c:89
#8  0x00007f23decf2e36 in __assert_fail_base (fmt=0x7f23df5d4062 "%s%s%s:%u: %s%sLa declaraci\303\263n `%s' no se cumple.\n%n", assertion=assertion@entry=0x7f232d6f3a63 "brw->hw_ctx != ((void *)0)", file=file@entry=0x7f232d6f3a28 "../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c", line=line@entry=43, function=function@entry=0x7f232d6f3a80 <__PRETTY_FUNCTION__.35445> "brw_get_graphics_reset_status") at assert.c:92
#9  0x00007f23decf2ee2 in __GI___assert_fail (assertion=assertion@entry=0x7f232d6f3a63 "brw->hw_ctx != ((void *)0)", file=file@entry=0x7f232d6f3a28 "../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c", line=line@entry=43, function=function@entry=0x7f232d6f3a80 <__PRETTY_FUNCTION__.35445> "brw_get_graphics_reset_status") at assert.c:101
#10 0x00007f232d5c2b25 in brw_get_graphics_reset_status (ctx=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/i965/brw_reset.c:43
#11 0x00007f232d34a3e0 in _mesa_GetGraphicsResetStatusARB () at ../../../../src/mesa/main/getstring.c:327
#12 0x00007f23df165959 in KWin::SceneOpenGL::paint (this=0x2e50e00, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:372
#13 0x00007f23df14a7f3 in KWin::Compositor::performCompositing (this=this@entry=0x21613a0) at ../../kwin/composite.cpp:618
#14 0x00007f23df14baef in KWin::Compositor::slotCompositingOptionsInitialized (this=0x21613a0) at ../../kwin/composite.cpp:273
#15 0x00007f23df0d43d5 in KWin::Compositor::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at moc_composite.cpp:193
#16 0x00007f23d919087a in QMetaObject::activate (sender=0x21aed50, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#17 0x00007f23d906ab18 in QFutureWatcherBase::event (this=<optimized out>, event=0x7f2320001520) at concurrent/qfuturewatcher.cpp:344
#18 0x00007f23d8515e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1feb7c0, receiver=receiver@entry=0x21aed50, e=e@entry=0x7f2320001520) at kernel/qapplication.cpp:4567
#19 0x00007f23d851c4a0 in QApplication::notify (this=this@entry=0x7ffff2775e50, receiver=receiver@entry=0x21aed50, e=e@entry=0x7f2320001520) at kernel/qapplication.cpp:4353
#20 0x00007f23dda01baa in KApplication::notify (this=0x7ffff2775e50, receiver=0x21aed50, event=0x7f2320001520) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f23d917c4dd in QCoreApplication::notifyInternal (this=0x7ffff2775e50, receiver=receiver@entry=0x21aed50, event=event@entry=0x7f2320001520) at kernel/qcoreapplication.cpp:953
#22 0x00007f23d917fb3d in sendEvent (event=0x7f2320001520, receiver=0x21aed50) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1f8b1f0) at kernel/qcoreapplication.cpp:1577
#24 0x00007f23d917ffe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#25 0x00007f23d85b832c in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#26 QEventDispatcherX11::processEvents (this=0x1f8caf0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#27 0x00007f23d917b0af in QEventLoop::processEvents (this=this@entry=0x7ffff2775cc0, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f23d917b3a5 in QEventLoop::exec (this=this@entry=0x7ffff2775cc0, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007f23d9180b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#30 0x00007f23d851437c in QApplication::exec () at kernel/qapplication.cpp:3828
#31 0x00007f23df104856 in kdemain (argc=3, argv=0x7ffff2775f98) at ../../kwin/main.cpp:597
#32 0x00007f23dece4ec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=3, argv=0x7ffff2775f98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff2775f88) at libc-start.c:287
#33 0x00000000004006fe in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 327310.

Possible duplicates by query: bug 332784, bug 330440, bug 329984, bug 328718, bug 328049.

Reported using DrKonqi