Application: kwin (4.10.1)
KDE Platform Version: 4.10.1
Qt Version: 4.8.4
Operating System: Linux 3.8.4-202.fc18.x86_64 x86_64
Distribution: "Fedora release 18 (Spherical Cow)"

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

i had lock the screensaver and then just unlock it the screensaver

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7fe80ba43880 (LWP 1702))]

Thread 2 (Thread 0x7fe7f9307700 (LWP 1712)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165
#1  0x00000038d1b868c7 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x38d1e94660 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00000038d1b868f9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003e64c07d15 in start_thread (arg=0x7fe7f9307700) at pthread_create.c:308
#4  0x0000003e644f246d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:114

Thread 1 (Thread 0x7fe80ba43880 (LWP 1702)):
[KCrash Handler]
#6  brw_update_renderbuffer_surface (brw=0x10345d0, rb=0x1014cf0, unit=0) at brw_wm_surface_state.c:1218
#7  0x00007fe7fb5ca4e0 in brw_update_renderbuffer_surfaces (brw=0x10345d0) at brw_wm_surface_state.c:1314
#8  0x00007fe7fb5a5a32 in brw_upload_state (brw=brw@entry=0x10345d0) at brw_state_upload.c:500
#9  0x00007fe7fb568fdf in brw_try_draw_prims (max_index=35, min_index=2863905464, ib=<optimized out>, nr_prims=<optimized out>, prim=0x7fffaab3baa0, arrays=<optimized out>, ctx=0x10345d0) at brw_draw.c:506
#10 brw_draw_prims (ctx=0x10345d0, prim=0x7fffaab3baa0, nr_prims=<optimized out>, ib=<optimized out>, index_bounds_valid=<optimized out>, min_index=0, max_index=35, tfb_vertcount=0x0) at brw_draw.c:593
#11 0x00007fe7fb0cdb64 in vbo_draw_arrays (ctx=0x10345d0, mode=4, start=0, count=36, numInstances=1, baseInstance=<optimized out>) at ../../../src/mesa/vbo/vbo_exec_array.c:619
#12 0x000000302b61292d in KWin::GLVertexBufferPrivate::corePainting(QRegion const&, unsigned int, bool) () from /lib64/libkwinglutils.so.1
#13 0x000000302b612e4d in KWin::GLVertexBuffer::render(QRegion const&, unsigned int, bool) () from /lib64/libkwinglutils.so.1
#14 0x000000302b612ed1 in KWin::GLVertexBuffer::render(unsigned int) () from /lib64/libkwinglutils.so.1
#15 0x000000302e0c225a in KWin::SceneOpenGL2::doPaintBackground(QVector<float> const&) () from /lib64/libkdeinit4_kwin.so
#16 0x000000302e0c4963 in KWin::SceneOpenGL::paintBackground(QRegion) () from /lib64/libkdeinit4_kwin.so
#17 0x000000302e0b7916 in KWin::Scene::paintSimpleScreen(int, QRegion) () from /lib64/libkdeinit4_kwin.so
#18 0x000000302e0b579e in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () from /lib64/libkdeinit4_kwin.so
#19 0x000000302e0d67f0 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /lib64/libkdeinit4_kwin.so
#20 0x000000302e4127a7 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /lib64/libkwineffects.so.1
#21 0x000000302e0d679b in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /lib64/libkdeinit4_kwin.so
#22 0x000000302e0b6b38 in KWin::Scene::paintScreen(int*, QRegion*) () from /lib64/libkdeinit4_kwin.so
#23 0x000000302e0c5f9e in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () from /lib64/libkdeinit4_kwin.so
#24 0x000000302e0b0f5c in KWin::Compositor::performCompositing() () from /lib64/libkdeinit4_kwin.so
#25 0x00000038caf8c1fc in QObject::event (this=0xf869d0, e=<optimized out>) at kernel/qobject.cpp:1156
#26 0x00000038cb5ca5cc in QApplicationPrivate::notify_helper (this=this@entry=0xe47430, receiver=receiver@entry=0xf869d0, e=e@entry=0x7fffaab3c870) at kernel/qapplication.cpp:4562
#27 0x00000038cb5cea4a in QApplication::notify (this=0x7fffaab3ceb0, receiver=0xf869d0, e=0x7fffaab3c870) at kernel/qapplication.cpp:4423
#28 0x0000003023c473c6 in KApplication::notify (this=0x7fffaab3ceb0, receiver=0xf869d0, event=0x7fffaab3c870) at /usr/src/debug/kdelibs-4.10.1/kdeui/kernel/kapplication.cpp:311
#29 0x00000038caf77abe in QCoreApplication::notifyInternal (this=0x7fffaab3ceb0, receiver=0xf869d0, event=0x7fffaab3c870) at kernel/qcoreapplication.cpp:946
#30 0x00000038cafa8972 in sendEvent (event=0x7fffaab3c870, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#31 QTimerInfoList::activateTimers (this=0xe47e28) at kernel/qeventdispatcher_unix.cpp:622
#32 0x00000038cafa89d0 in QEventDispatcherUNIX::activateTimers (this=this@entry=0xdf5cc0) at kernel/qeventdispatcher_unix.cpp:879
#33 0x00000038cafa8b28 in QEventDispatcherUNIX::processEvents (this=0xdf5cc0, flags=...) at kernel/qeventdispatcher_unix.cpp:941
#34 0x00000038cb66b55f in QEventDispatcherX11::processEvents (this=0xdf5cc0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#35 0x00000038caf7680f in QEventLoop::processEvents (this=this@entry=0x7fffaab3cbc0, flags=...) at kernel/qeventloop.cpp:149
#36 0x00000038caf76a98 in QEventLoop::exec (this=0x7fffaab3cbc0, flags=...) at kernel/qeventloop.cpp:204
#37 0x00000038caf7b888 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#38 0x000000302e067d6a in kdemain () from /lib64/libkdeinit4_kwin.so
#39 0x0000003e64421a05 in __libc_start_main (main=0x400960 <main>, argc=1, ubp_av=0x7fffaab3cff8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffaab3cfe8) at libc-start.c:225
#40 0x0000000000400991 in _start ()

Possible duplicates by query: bug 317160, bug 317130, bug 316866, bug 316327, bug 314730.

Reported using DrKonqi