Application: kwin (4.4.2 (KDE 4.4.2)) KDE Platform Version: 4.4.2 (KDE 4.4.2) Qt Version: 4.6.2 Operating System: Linux 2.6.32-22-generic i686 Distribution: Ubuntu 10.04 LTS -- Information about the crash: I have effects turned on and when I switched desktop one window stayed semitransparent(like when hower on anoter taskbar icon) and kwin crashed The crash can be reproduced some of the time. -- Backtrace: Application: KWin (kwin), signal: Segmentation fault [Current thread is 1 (Thread 0xb78ce720 (LWP 32711))] Thread 2 (Thread 0xab93bb70 (LWP 32723)): #0 0x00b97e16 in clock_gettime () from /lib/tls/i686/cmov/librt.so.1 #1 0x066116fb in qt_gettime () at kernel/qcore_unix.cpp:111 #2 0x06616825 in QTimerInfoList::updateCurrentTime (this=0x9105164) at kernel/qeventdispatcher_unix.cpp:340 #3 0x0661686a in QTimerInfoList::timerWait (this=0x9105164, tm=...) at kernel/qeventdispatcher_unix.cpp:443 #4 0x06614818 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xab93b0bc) at kernel/qeventdispatcher_glib.cpp:136 #5 0x066148a5 in timerSourcePrepare (source=0x0, timeout=0xb9bff4) at kernel/qeventdispatcher_glib.cpp:169 #6 0x038a7aca in g_main_context_prepare () from /lib/libglib-2.0.so.0 #7 0x038a7ee9 in ?? () from /lib/libglib-2.0.so.0 #8 0x038a84b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0 #9 0x0661460f in QEventDispatcherGlib::processEvents (this=0x91130e8, flags=...) at kernel/qeventdispatcher_glib.cpp:414 #10 0x065e7059 in QEventLoop::processEvents (this=0xab93b280, flags=) at kernel/qeventloop.cpp:149 #11 0x065e74aa in QEventLoop::exec (this=0xab93b280, flags=...) at kernel/qeventloop.cpp:201 #12 0x064e35a8 in QThread::exec (this=0x910e7a8) at thread/qthread.cpp:487 #13 0x065c6c1b in QInotifyFileSystemWatcherEngine::run (this=0x910e7a8) at io/qfilesystemwatcher_inotify.cpp:248 #14 0x064e632e in QThreadPrivate::start (arg=0x910e7a8) at thread/qthread_unix.cpp:248 #15 0x005fb96e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0 #16 0x00c6ba0e in clone () from /lib/tls/i686/cmov/libc.so.6 Thread 1 (Thread 0xb78ce720 (LWP 32711)): [KCrash Handler] #6 0x06acc1d5 in KWin::FlipSwitchEffect::paintWindow (this=0x8e973f0, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/flipswitch/flipswitch.cpp:535 #7 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #8 0x06a6b275 in KWin::DesktopGridEffect::paintWindow (this=0x8f52570, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:359 #9 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #10 0x06aa2b42 in KWin::SlideEffect::paintWindow (this=0x8ecd7d8, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:165 #11 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #12 0x06a80e8c in KWin::TranslucencyEffect::paintWindow (this=0x8f52728, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/translucency/translucency.cpp:180 #13 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #14 0x06aaeac2 in KWin::CoverSwitchEffect::paintWindow (this=0x8f616b0, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:500 #15 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #16 0x06a7bfc1 in KWin::LoginEffect::paintWindow (this=0x8ecd658, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/effects/login/login.cpp:69 #17 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #18 0x0054a3ad in KWin::Effect::paintWindow (this=0x8f60750, w=0x927f2a0, mask=34, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:242 #19 0x00704c37 in KWin::EffectsHandlerImpl::paintWindow (this=0x8e43910, w=0x927f2a0, mask=34, region=..., data=...) at ../../kwin/effects.cpp:153 #20 0x006ec9cc in KWin::Scene::paintWindow (this=0x8e47148, w=0x926e338, mask=34, region=..., quads=...) at ../../kwin/scene.cpp:312 #21 0x006ed7a5 in KWin::Scene::paintGenericScreen (this=0x8e47148, orig_mask=<value optimized out>) at ../../kwin/scene.cpp:210 #22 0x006f89f5 in KWin::SceneOpenGL::paintGenericScreen (this=0x8e47148, mask=<value optimized out>, data=...) at ../../kwin/scene_opengl.cpp:880 #23 0x006eb230 in KWin::Scene::finalPaintScreen (this=0x8e47148, mask=32, region=..., data=...) at ../../kwin/scene.cpp:174 #24 0x00704cac in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:126 #25 0x06a7d5d7 in KWin::LogoutEffect::paintScreen (this=0x8f47488, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:196 #26 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #27 0x06a83e6f in KWin::PresentWindowsEffect::paintScreen (this=0x8ecf9b8, mask=32, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:196 #28 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #29 0x0054a426 in KWin::Effect::paintScreen (this=0x8f58590, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #30 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #31 0x0054a426 in KWin::Effect::paintScreen (this=0x8ebb860, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #32 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #33 0x0054a426 in KWin::Effect::paintScreen (this=0x8ecdca8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #34 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #35 0x0054a426 in KWin::Effect::paintScreen (this=0x8ec05e0, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #36 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #37 0x0054a426 in KWin::Effect::paintScreen (this=0x8ed7968, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #38 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #39 0x06ac9d32 in KWin::FlipSwitchEffect::paintScreen (this=0x8e973f0, mask=32, region=..., data=...) at ../../../kwin/effects/flipswitch/flipswitch.cpp:146 #40 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #41 0x06a67a83 in KWin::DesktopGridEffect::paintScreen (this=0x8f52570, mask=32, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:151 #42 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #43 0x06aa34ea in KWin::SlideEffect::paintScreen (this=0x8ecd7d8, mask=32, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:86 #44 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #45 0x0054a426 in KWin::Effect::paintScreen (this=0x8f52728, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #46 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #47 0x06ab0a9c in KWin::CoverSwitchEffect::paintScreen (this=0x8f616b0, mask=32, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:124 #48 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #49 0x0054a426 in KWin::Effect::paintScreen (this=0x8ecd658, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227 #50 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #51 0x06aad133 in KWin::ZoomEffect::paintScreen (this=0x8f60748, mask=32, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:73 #52 0x00704d30 in KWin::EffectsHandlerImpl::paintScreen (this=0x8e43910, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #53 0x006ecca4 in KWin::Scene::paintScreen (this=0x8e47148, mask=0xbfbf8d98, region=0xbfbf8e64) at ../../kwin/scene.cpp:134 #54 0x006fe53a in KWin::SceneOpenGL::paint (this=0x8e47148, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:748 #55 0x006e7604 in KWin::Workspace::performCompositing (this=0x8e33da8) at ../../kwin/composite.cpp:424 #56 0x0065f4a6 in KWin::Workspace::qt_metacall (this=0x8e33da8, _c=QMetaObject::InvokeMetaMethod, _id=173, _a=0xbfbf8f8c) at ./workspace.moc:535 #57 0x065edc9a in QMetaObject::metacall (object=0x8e33da8, cl=157003840, idx=173, argv=0xbfbf8f8c) at kernel/qmetaobject.cpp:237 #58 0x065fc3d5 in QMetaObject::activate (sender=0x8e34030, m=0x66fc5a4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3293 #59 0x0664daa7 in QTimer::timeout (this=0x8e34030) at .moc/release-shared/moc_qtimer.cpp:134 #60 0x0660460e in QTimer::timerEvent (this=0x8e34030, e=0xbfbf94e0) at kernel/qtimer.cpp:271 #61 0x065f9254 in QObject::event (this=0x8e34030, e=0xbfbf7990) at kernel/qobject.cpp:1212 #62 0x070de4dc in QApplicationPrivate::notify_helper (this=0x8d8d620, receiver=0x8e34030, e=0xbfbf94e0) at kernel/qapplication.cpp:4300 #63 0x070e505e in QApplication::notify (this=0xbfbf9858, receiver=0x8e34030, e=0xbfbf94e0) at kernel/qapplication.cpp:3704 #64 0x002eff2a in KApplication::notify (this=0xbfbf9858, receiver=0x8e34030, event=0xbfbf94e0) at ../../kdeui/kernel/kapplication.cpp:302 #65 0x0067bdef in KWin::Application::notify (this=0xbfbf9858, o=0x8e34030, e=0xbfbf94e0) at ../../kwin/main.cpp:370 #66 0x065e8a3b in QCoreApplication::notifyInternal (this=0xbfbf9858, receiver=0x8e34030, event=0xbfbf94e0) at kernel/qcoreapplication.cpp:704 #67 0x06617d66 in QCoreApplication::sendEvent (this=0x8d90834) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215 #68 QTimerInfoList::activateTimers (this=0x8d90834) at kernel/qeventdispatcher_unix.cpp:603 #69 0x06614917 in timerSourceDispatch (source=0x8d90868) at kernel/qeventdispatcher_glib.cpp:184 #70 idleTimerSourceDispatch (source=0x8d90868) at kernel/qeventdispatcher_glib.cpp:231 #71 0x038a45e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0 #72 0x038a82d8 in ?? () from /lib/libglib-2.0.so.0 #73 0x038a84b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0 #74 0x066145d5 in QEventDispatcherGlib::processEvents (this=0x8d77de8, flags=...) at kernel/qeventdispatcher_glib.cpp:412 #75 0x0719e135 in QGuiEventDispatcherGlib::processEvents (this=0x8d77de8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204 #76 0x065e7059 in QEventLoop::processEvents (this=0xbfbf97a4, flags=) at kernel/qeventloop.cpp:149 #77 0x065e74aa in QEventLoop::exec (this=0xbfbf97a4, flags=...) at kernel/qeventloop.cpp:201 #78 0x065eb69f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981 #79 0x070de577 in QApplication::exec () at kernel/qapplication.cpp:3579 #80 0x0067da00 in kdemain (argc=3, argv=0xbfbf9a64) at ../../kwin/main.cpp:526 #81 0x0804860b in main (argc=3, argv=0xbfbf9a64) at kwin_dummy.cpp:3 Possible duplicates by query: bug 235728, bug 235723, bug 230864, bug 228210. Reported using DrKonqi
I see the bug. crashes in m_windows[ w ]->opacity = data.opacity; in ::paintWindow() and guess what - at this point the hash is not fully protected*, what makes the ItemInfo pointer invalid. ... *sigh* - so let's go one more time :-( * if ((m_start || m_stop) && !m_windows.contains(w)) is bypassed whenever (m_start || m_stop) is false (most of the time)
Git commit af4bbe815ee579d96bc87990f193b9d3cfa6bcf9 by Thomas Lübking. Committed on 10/05/2011 at 01:46. Pushed by luebking into branch 'master'. strip QHash::operator[] from flipswitch BUG: 238334 M +25 -31 kwin/effects/flipswitch/flipswitch.cpp http://commits.kde.org/kde-workspace/af4bbe815ee579d96bc87990f193b9d3cfa6bcf9