Bug 325733

Application: plasma-desktop (4.11.1)
KDE Platform Version: 4.11.1 (Compiled from sources)
Qt Version: 4.8.5
Operating System: Linux 3.11.0-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

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

I was closing several applications (Konsole, Firefox, some others) via right-click -> close. Shortly afterwards Plasma-desktop crashed. There were probably multiple Konsole windows grouped, so this might be related to bug 324844. The backtrace looks different though and it occured while closing, not while grouping/ungrouping. The crash occured twice so far, but is kinda hard to provoke.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa68d90c780 (LWP 4390))]

Thread 3 (Thread 0x7fa671d36700 (LWP 4391)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa67efe2bb7 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7fa67f2f0660 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fa67efe2be9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fa68b235fda in start_thread (arg=0x7fa671d36700) at pthread_create.c:308
#4  0x00007fa68af7097d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fa5e7628700 (LWP 4395)):
#0  poll () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fa6880b2cac in g_main_context_poll (n_fds=1, fds=0x7fa5e0002bb0, timeout=-1, context=0x7fa5e00009a0, priority=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3995
#2  g_main_context_iterate (context=context@entry=0x7fa5e00009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3696
#3  0x00007fa6880b2dd4 in g_main_context_iteration (context=0x7fa5e00009a0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3762
#4  0x00007fa68c59a266 in QEventDispatcherGlib::processEvents (this=0x7fa5e00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x00007fa68c56aaaf in QEventLoop::processEvents (this=this@entry=0x7fa5e7627e40, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fa68c56ad38 in QEventLoop::exec (this=this@entry=0x7fa5e7627e40, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fa68c46d040 in QThread::exec (this=this@entry=0x129b6b0) at thread/qthread.cpp:536
#8  0x00007fa68c54c7df in QInotifyFileSystemWatcherEngine::run (this=0x129b6b0) at io/qfilesystemwatcher_inotify.cpp:256
#9  0x00007fa68c46f7cc in QThreadPrivate::start (arg=0x129b6b0) at thread/qthread_unix.cpp:338
#10 0x00007fa68b235fda in start_thread (arg=0x7fa5e7628700) at pthread_create.c:308
#11 0x00007fa68af7097d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7fa68d90c780 (LWP 4390)):
[KCrash Handler]
#6  QGraphicsItem::ungrabMouse (this=0x2ed6920) at graphicsview/qgraphicsitem.cpp:3530
#7  0x00007fa68befb50c in QGraphicsScenePrivate::clearMouseGrabber (this=this@entry=0x139e6d0) at graphicsview/qgraphicsscene.cpp:1004
#8  0x00007fa68befef22 in QGraphicsScenePrivate::sendMouseEvent (this=0x139e6d0, mouseEvent=0x7fff85232890) at graphicsview/qgraphicsscene.cpp:1279
#9  0x00007fa68bf0792c in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff85232890) at graphicsview/qgraphicsscene.cpp:4102
#10 0x00007fa68bf12e50 in QGraphicsScene::event (this=0x145c130, event=0x7fff85232890) at graphicsview/qgraphicsscene.cpp:3451
#11 0x00007fa68b91beec in QApplicationPrivate::notify_helper (this=this@entry=0x12d0a50, receiver=receiver@entry=0x145c130, e=e@entry=0x7fff85232890) at kernel/qapplication.cpp:4562
#12 0x00007fa68b91e85b in QApplication::notify (this=this@entry=0x12a6090, receiver=receiver@entry=0x145c130, e=e@entry=0x7fff85232890) at kernel/qapplication.cpp:4423
#13 0x00007fa68d31a696 in KApplication::notify (this=0x12a6090, receiver=0x145c130, event=0x7fff85232890) at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kdeui/kernel/kapplication.cpp:311
#14 0x00007fa68c56bdfe in QCoreApplication::notifyInternal (this=0x12a6090, receiver=0x145c130, event=0x7fff85232890, event@entry=0x7fff852327c0) at kernel/qcoreapplication.cpp:949
#15 0x00007fa68b91aa86 in sendSpontaneousEvent (event=event@entry=0x7fff852327c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#16 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff85232890) at kernel/qapplication.cpp:5560
#17 0x00007fa68bf2a914 in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x27c6af0, event=event@entry=0x7fff852332c0) at graphicsview/qgraphicsview.cpp:646
#18 0x00007fa68bf2ac9e in QGraphicsView::mouseMoveEvent (this=0x27c6970, event=0x7fff852332c0) at graphicsview/qgraphicsview.cpp:3276
#19 0x00007fa68b9690cb in QWidget::event (this=this@entry=0x27c6970, event=event@entry=0x7fff852332c0) at kernel/qwidget.cpp:8361
#20 0x00007fa68bd15436 in QFrame::event (this=0x27c6970, e=0x7fff852332c0) at widgets/qframe.cpp:557
#21 0x00007fa68bf2cafb in QGraphicsView::viewportEvent (this=0x27c6970, event=0x7fff852332c0) at graphicsview/qgraphicsview.cpp:2866
#22 0x00007fa68c56bf66 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x12d0a50, receiver=receiver@entry=0x27dc020, event=event@entry=0x7fff852332c0) at kernel/qcoreapplication.cpp:1059
#23 0x00007fa68b91bebc in QApplicationPrivate::notify_helper (this=this@entry=0x12d0a50, receiver=receiver@entry=0x27dc020, e=e@entry=0x7fff852332c0) at kernel/qapplication.cpp:4558
#24 0x00007fa68b91f0bb in QApplication::notify (this=this@entry=0x12a6090, receiver=receiver@entry=0x27dc020, e=e@entry=0x7fff852332c0) at kernel/qapplication.cpp:4105
#25 0x00007fa68d31a696 in KApplication::notify (this=0x12a6090, receiver=0x27dc020, event=0x7fff852332c0) at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kdeui/kernel/kapplication.cpp:311
#26 0x00007fa68c56bdfe in QCoreApplication::notifyInternal (this=0x12a6090, receiver=receiver@entry=0x27dc020, event=event@entry=0x7fff852332c0) at kernel/qcoreapplication.cpp:949
#27 0x00007fa68b921f8b in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x27dc020, event=event@entry=0x7fff852332c0, alienWidget=alienWidget@entry=0x27dc020, nativeWidget=nativeWidget@entry=0x27c6970, buttonDown=buttonDown@entry=0x7fa68c3f0288 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3173
#29 0x00007fa68b994d04 in QETWidget::translateMouseEvent (this=this@entry=0x27c6970, event=event@entry=0x7fff85233a10) at kernel/qapplication_x11.cpp:4517
#30 0x00007fa68b993601 in QApplication::x11ProcessEvent (this=0x12a6090, event=event@entry=0x7fff85233a10) at kernel/qapplication_x11.cpp:3640
#31 0x00007fa68b9bc342 in x11EventSourceDispatch (s=s@entry=0x12ce6f0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0x00007fa6880b29d5 in g_main_dispatch (context=0x12d0de0) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3054
#33 g_main_context_dispatch (context=context@entry=0x12d0de0) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3630
#34 0x00007fa6880b2d18 in g_main_context_iterate (context=context@entry=0x12d0de0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3701
#35 0x00007fa6880b2dd4 in g_main_context_iteration (context=0x12d0de0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.36.4-r1/work/glib-2.36.4/glib/gmain.c:3762
#36 0x00007fa68c59a246 in QEventDispatcherGlib::processEvents (this=0x12a77d0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#37 0x00007fa68b9bc41e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007fa68c56aaaf in QEventLoop::processEvents (this=this@entry=0x7fff85233dd0, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007fa68c56ad38 in QEventLoop::exec (this=this@entry=0x7fff85233dd0, flags=...) at kernel/qeventloop.cpp:204
#40 0x00007fa68c56ff78 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#41 0x00007fa68b91a85c in QApplication::exec () at kernel/qapplication.cpp:3823
#42 0x00007fa67aec4351 in kdemain (argc=1, argv=0x11ec5b0) at /var/tmp/portage/kde-base/plasma-workspace-4.11.1/work/plasma-workspace-4.11.1/plasma/desktop/shell/main.cpp:126
#43 0x0000000000407fea in launch (argc=argc@entry=1, _name=_name@entry=0x11ea9d8 "/usr/bin/plasma-desktop", args=args@entry=0x11ea9f0 "", cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x11ea9f8 "", reset_env=false, tty=tty@entry=0x0, avoid_loops=false, startup_id_str=startup_id_str@entry=0x40a846 "0") at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kinit/kinit.cpp:726
#44 0x0000000000408e7b in handle_launcher_request (sock=7, who=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kinit/kinit.cpp:1218
#45 0x00000000004094c3 in handle_requests (waitForPid=waitForPid@entry=0) at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kinit/kinit.cpp:1411
#46 0x000000000040530f in main (argc=2, argv=0x7fff00000001, envp=0x7fff85234b10) at /var/tmp/portage/kde-base/kdelibs-4.11.1/work/kdelibs-4.11.1/kinit/kinit.cpp:1899

The reporter indicates this bug may be a duplicate of or related to bug 324844.

Possible duplicates by query: bug 324844.

Reported using DrKonqi