Bug 360135

Application: kwin_x11 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-21-generic i686
Distribution: Ubuntu 15.04

-- Information about the crash:
A Firefoxban egy PDF-re mutató linkre kattintottam, ami megnyílt az Adobe Readerben, de az ablak nem reagált a kattintásokra. Aztán kaptam egy hibaüzenetet arról, hogy a KWin összeomlott, és onnantól az ablak már reagált a kattintásaimra.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1b33780 (LWP 1821))]

Thread 5 (Thread 0xaff32b40 (LWP 1828)):
#0  0xb7774be0 in __kernel_vsyscall ()
#1  0xb76623db in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0xb493c120 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb492d014 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb492d439 in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb04d12f5 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb495440a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb4a711aa in start_thread (arg=0xaff32b40) at pthread_create.c:333
#8  0xb766cfde in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:122

Thread 4 (Thread 0xaf5ffb40 (LWP 1829)):
#0  0xb767a051 in __libc_enable_asynccancel () at ../nptl/cancellation.c:30
#1  0xb765c741 in read () at ../sysdeps/unix/syscall-template.S:81
#2  0xb4972515 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb492ca82 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb492cfaa in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb492d156 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb492d1b0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb495440a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb4a711aa in start_thread (arg=0xaf5ffb40) at pthread_create.c:333
#9  0xb766cfde in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:122

Thread 3 (Thread 0xae2a3b40 (LWP 1855)):
#0  0xb7774be0 in __kernel_vsyscall ()
#1  0xb76652d1 in select () at ../sysdeps/unix/syscall-template.S:81
#2  0xb635cf8e in qt_safe_select (nfds=25, fdread=0xa127800, fdwrite=0xa127a0c, fdexcept=0xa127c18, orig_timeout=0x0) at kernel/qcore_unix.cpp:75
#3  0xb635e903 in select (timeout=<optimized out>, exceptfds=<optimized out>, writefds=<optimized out>, readfds=<optimized out>, nfds=<optimized out>, this=<optimized out>) at kernel/qeventdispatcher_unix.cpp:320
#4  QEventDispatcherUNIXPrivate::doSelect (this=0xa127720, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:196
#5  0xb635eeb6 in QEventDispatcherUNIX::processEvents (this=0xa1195d0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#6  0xb6302d93 in QEventLoop::processEvents (this=0xae2a3254, flags=...) at kernel/qeventloop.cpp:128
#7  0xb63031fa in QEventLoop::exec (this=0xae2a3254, flags=...) at kernel/qeventloop.cpp:204
#8  0xb60d540d in QThread::exec (this=0xa127528) at thread/qthread.cpp:503
#9  0xb4dca50f in ?? () from /usr/lib/i386-linux-gnu/libQt5Qml.so.5
#10 0xb60da7eb in QThreadPrivate::start (arg=0xa127528) at thread/qthread_unix.cpp:337
#11 0xb4a711aa in start_thread (arg=0xae2a3b40) at pthread_create.c:333
#12 0xb766cfde in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:122

Thread 2 (Thread 0xab04ab40 (LWP 1866)):
#0  0xb7774be0 in __kernel_vsyscall ()
#1  0xb4a7625c in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb7679cf6 in __pthread_cond_wait (cond=0xb59208f0, mutex=0xb59208d8) at forward.c:149
#3  0xb57de784 in ?? () from /usr/lib/i386-linux-gnu/libQt5Script.so.5
#4  0xb57de7cc in ?? () from /usr/lib/i386-linux-gnu/libQt5Script.so.5
#5  0xb4a711aa in start_thread (arg=0xab04ab40) at pthread_create.c:333
#6  0xb766cfde in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:122

Thread 1 (Thread 0xb1b33780 (LWP 1821)):
[KCrash Handler]
#7  0x00000000 in ?? ()
#8  0xb7371eeb in KWin::Workspace::constrainedStackingOrder (this=0xa071330) at ../layers.cpp:506
#9  0xb7372912 in KWin::Workspace::updateStackingOrder (this=this@entry=0xa071330, propagate_new_clients=<optimized out>) at ../layers.cpp:119
#10 0xb7372daf in updateStackingOrder (propagate_new_clients=<optimized out>, this=0xa071330) at ../layers.cpp:612
#11 KWin::Workspace::blockStackingUpdates (this=0xa071330, block=false) at ../layers.cpp:613
#12 0xb7358c02 in ~StackingUpdatesBlocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../workspace.h:606
#13 KWin::Client::destroyClient (this=0xa3b7f00) at ../client.cpp:432
#14 0xb7381744 in KWin::Client::unmapNotifyEvent (this=0xa3b7f00, e=0xb0d00e68) at ../events.cpp:806
#15 0xb7384f3a in KWin::Client::windowEvent (this=0xa3b7f00, e=0xb0d00e68) at ../events.cpp:646
#16 0xb7386186 in KWin::Workspace::workspaceEvent (this=0xa071330, e=0xb0d00e68) at ../events.cpp:349
#17 0xb7374cfe in KWin::XcbEventFilter::nativeEventFilter (this=0xa05edf0, eventType=..., message=0xb0d00e68, result=0xbf9101cc) at ../main.cpp:408
#18 0xb6302217 in QAbstractEventDispatcher::filterNativeEvent (this=0x9f84b20, eventType=..., message=0xb0d00e68, result=0xbf9101cc) at kernel/qabstracteventdispatcher.cpp:460
#19 0xb17105f4 in QXcbConnection::handleXcbEvent (this=0x9e84780, event=0xb0d00e68) at qxcbconnection.cpp:863
#20 0xb1711a50 in QXcbConnection::processXcbEvents (this=0x9e84780) at qxcbconnection.cpp:1303
#21 0xb173d581 in QXcbConnection::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at .moc/moc_qxcbconnection.cpp:185
#22 0xb6336590 in QMetaCallEvent::placeMetaCall (this=0xb0d00e08, object=0x9e84780) at kernel/qobject.cpp:485
#23 0xb6339d03 in QObject::event (this=0x9e84780, e=0xb0d00e08) at kernel/qobject.cpp:1245
#24 0xb1711f59 in QXcbConnection::event (this=0x9e84780, e=0xb0d00e08) at qxcbconnection.cpp:1916
#25 0xb6c0a82a in QApplicationPrivate::notify_helper (this=0x9e80060, receiver=0x9e84780, e=0xb0d00e08) at kernel/qapplication.cpp:3720
#26 0xb6c10081 in QApplication::notify (this=0xbf910870, receiver=0x9e84780, e=0xb0d00e08) at kernel/qapplication.cpp:3503
#27 0xb737858a in KWin::Application::notify (this=0xbf910870, o=0x9e84780, e=0xb0d00e08) at ../main.cpp:229
#28 0xb6305b8a in QCoreApplication::notifyInternal (this=0xbf910870, receiver=0x9e84780, event=0xb0d00e08) at kernel/qcoreapplication.cpp:935
#29 0xb6307e7c in sendEvent (event=0xb0d00e08, receiver=0x9e84780) at kernel/qcoreapplication.h:228
#30 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9e76fd0) at kernel/qcoreapplication.cpp:1552
#31 0xb635ed44 in QEventDispatcherUNIX::processEvents (this=0x9f84b20, flags=...) at kernel/qeventdispatcher_unix.cpp:579
#32 0xb176b99f in QUnixEventDispatcherQPA::processEvents (this=0x9f84b20, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#33 0xb6302d93 in QEventLoop::processEvents (this=0xbf9107b8, flags=...) at kernel/qeventloop.cpp:128
#34 0xb63031fa in QEventLoop::exec (this=0xbf9107b8, flags=...) at kernel/qeventloop.cpp:204
#35 0xb630b315 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#36 0xb6640a41 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#37 0xb6c05da4 in QApplication::exec () at kernel/qapplication.cpp:2956
#38 0xb7741a90 in kdemain (argc=1, argv=0xbf910974) at ../main_x11.cpp:294
#39 0x08048607 in main (argc=3, argv=0xbf910974) at kwin_x11_dummy.cpp:3

Reported using DrKonqi