Application: kwin (4.11.3)
KDE Platform Version: 4.11.3
Qt Version: 4.8.4
Operating System: Linux 3.11.0-14-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed: i changed compositing type to open gl 3.1 and kwin crashed and it crashes

-- Backtrace:
Application: KWin (kwin), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f5601c60f77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007f5601c645e8 in __GI_abort () at abort.c:90
#8  0x00007f5601c59d43 in __assert_fail_base (fmt=0x7f5601db0f58 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f55ffba4550 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f55ffba439b "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7f55ffba4856 <__PRETTY_FUNCTION__.14361> "poll_for_event") at assert.c:92
#9  0x00007f5601c59df2 in __GI___assert_fail (assertion=assertion@entry=0x7f55ffba4550 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f55ffba439b "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7f55ffba4856 <__PRETTY_FUNCTION__.14361> "poll_for_event") at assert.c:101
#10 0x00007f55ffb34ca9 in poll_for_event (dpy=dpy@entry=0x1590360) at ../../src/xcb_io.c:271
#11 0x00007f55ffb34d3e in poll_for_response (dpy=dpy@entry=0x1590360) at ../../src/xcb_io.c:289
#12 0x00007f55ffb3501d in _XEventsQueued (dpy=0x1590360, mode=mode@entry=1) at ../../src/xcb_io.c:363
#13 0x00007f55ffb352c3 in _XFlush (dpy=<optimized out>) at ../../src/xcb_io.c:514
#14 0x00007f55ffb37cd5 in _XGetRequest (dpy=dpy@entry=0x1590360, type=type@entry=5 '\005', len=len@entry=20) at ../../src/XlibInt.c:1735
#15 0x00007f55fcbd7077 in DRI2GetBuffersWithFormat (dpy=0x1590360, drawable=62916143, width=width@entry=0x19a84a8, height=height@entry=0x19a84ac, attachments=0x7fffee391040, count=1, outCount=outCount@entry=0x7fffee39103c) at ../../../../src/glx/dri2.c:476
#16 0x00007f55fcbd4aeb in dri2GetBuffersWithFormat (driDrawable=<optimized out>, width=0x19a84a8, height=0x19a84ac, attachments=<optimized out>, count=<optimized out>, out_count=0x7fffee39103c, loaderPrivate=0x19a83a0) at ../../../../src/glx/dri2_glx.c:888
#17 0x00007f55df0ec54c in intel_query_dri2_buffers (buffer_count=0x7fffee39103c, buffers=<synthetic pointer>, drawable=0x19a8480, brw=0x7f55e40b9040) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1233
#18 intel_update_dri2_buffers (drawable=0x19a8480, brw=0x7f55e40b9040) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1050
#19 intel_update_renderbuffers (context=context@entry=0x19e0850, drawable=drawable@entry=0x19a8480) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1106
#20 0x00007f55df0ec853 in intel_prepare_render (brw=brw@entry=0x7f55e40b9040) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:1124
#21 0x00007f55df0ec9a2 in intelMakeCurrent (driContextPriv=<optimized out>, driDrawPriv=<optimized out>, driReadPriv=0x19a8480) at ../../../../../../../src/mesa/drivers/dri/i965/brw_context.c:969
#22 0x00007f55df092606 in driBindContext (pcp=<optimized out>, pdp=<optimized out>, prp=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/common/dri_util.c:534
#23 0x00007f55fcbd63cf in dri2_bind_context (context=0x19e06b0, old=<optimized out>, draw=<optimized out>, read=<optimized out>) at ../../../../src/glx/dri2_glx.c:153
#24 0x00007f55fcbb0b2c in MakeContextCurrent (dpy=0x1590360, draw=62916144, read=62916144, gc_user=0x19e06b0) at ../../../../src/glx/glxcurrent.c:259
#25 0x00007f56020d36f9 in KWin::GlxBackend::initRenderingContext (this=this@entry=0x19e0b90) at ../../kwin/glxbackend.cpp:209
#26 0x00007f56020d5239 in KWin::GlxBackend::init (this=0x19e0b90) at ../../kwin/glxbackend.cpp:93
#27 0x00007f56020d025c in KWin::SceneOpenGL::createScene () at ../../kwin/scene_opengl.cpp:199
#28 0x00007f56020b5195 in KWin::Compositor::slotCompositingOptionsInitialized (this=0x176a880) at ../../kwin/composite.cpp:202
#29 0x00007f560203c855 in KWin::Compositor::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at moc_composite.cpp:194
#30 0x00007f55fc106a58 in QMetaObject::activate (sender=0x19b4ad0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#31 0x00007f55fbfe3ac8 in QFutureWatcherBase::event (this=<optimized out>, event=0x7f55e0003530) at concurrent/qfuturewatcher.cpp:344
#32 0x00007f55fb48fdfc in QApplicationPrivate::notify_helper (this=this@entry=0x158e4f0, receiver=receiver@entry=0x19b4ad0, e=e@entry=0x7f55e0003530) at kernel/qapplication.cpp:4567
#33 0x00007f55fb496470 in QApplication::notify (this=this@entry=0x7fffee391d30, receiver=receiver@entry=0x19b4ad0, e=e@entry=0x7f55e0003530) at kernel/qapplication.cpp:4353
#34 0x00007f560096aa6a in KApplication::notify (this=0x7fffee391d30, receiver=0x19b4ad0, event=0x7f55e0003530) at ../../kdeui/kernel/kapplication.cpp:311
#35 0x00007f55fc0f28bd in QCoreApplication::notifyInternal (this=0x7fffee391d30, receiver=receiver@entry=0x19b4ad0, event=event@entry=0x7f55e0003530) at kernel/qcoreapplication.cpp:946
#36 0x00007f55fc0f5e1f in sendEvent (event=0x7f55e0003530, receiver=0x19b4ad0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x15271f0) at kernel/qcoreapplication.cpp:1570
#38 0x00007f55fc0f62c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#39 0x00007f55fb53214c in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#40 QEventDispatcherX11::processEvents (this=0x158e480, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#41 0x00007f55fc0f15ef in QEventLoop::processEvents (this=this@entry=0x7fffee391ba0, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007f55fc0f18e5 in QEventLoop::exec (this=this@entry=0x7fffee391ba0, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007f55fc0f6e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#44 0x00007f55fb48e34c in QApplication::exec () at kernel/qapplication.cpp:3828
#45 0x00007f560206d956 in kdemain (argc=2, argv=0x7fffee391e78) at ../../kwin/main.cpp:597
#46 0x00007f5601c4bde5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=2, ubp_av=0x7fffee391e78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffee391e68) at libc-start.c:260
#47 0x00000000004006fe in _start ()

Possible duplicates by query: bug 325166, bug 324255, bug 315521, bug 313655, bug 311955.

Reported using DrKonqi