Bug 323956

Application: plasma-desktop (4.11.00)
KDE Platform Version: 4.11.00 (Compiled from sources)
Qt Version: 4.8.4
Operating System: Linux 3.9.11-030911-generic x86_64
Distribution: Ubuntu 13.04

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

I had Google Chrome open and it was hanging. I attempted to open the Help menu from the Plasma Application Menu widget and it crashed.

- Unusual behavior I noticed:

Clicking on the menubar in the Plasma panel didn't do anything.

- Custom settings of the application:

I was using the Application Menu Bar widget in the menu form (not the button form).

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff8382ea7c0 (LWP 2523))]

Thread 4 (Thread 0x7ff817d38700 (LWP 2527)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ff83101fb27 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007ff83101fb59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007ff82b706f8e in start_thread (arg=0x7ff817d38700) at pthread_create.c:311
#4  0x00007ff837bdee1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7ff7880d1700 (LWP 2540)):
#0  0x00007ff82b043359 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ff82b0435b9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff82b00334e in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff82b0040b4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff82b004304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff8347bc036 in QEventDispatcherGlib::processEvents (this=0x7ff7800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007ff83478c38f in QEventLoop::processEvents (this=this@entry=0x7ff7880d0d90, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007ff83478c618 in QEventLoop::exec (this=this@entry=0x7ff7880d0d90, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007ff83468e410 in QThread::exec (this=this@entry=0x2153800) at thread/qthread.cpp:542
#9  0x00007ff83476dedf in QInotifyFileSystemWatcherEngine::run (this=0x2153800) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007ff834690bec in QThreadPrivate::start (arg=0x2153800) at thread/qthread_unix.cpp:338
#11 0x00007ff82b706f8e in start_thread (arg=0x7ff7880d1700) at pthread_create.c:311
#12 0x00007ff837bdee1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7ff77b13e700 (LWP 2544)):
#0  0x00007ff82b043359 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ff82b0435b9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff82b0042f0 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff8347bc036 in QEventDispatcherGlib::processEvents (this=0x7ff7740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007ff83478c38f in QEventLoop::processEvents (this=this@entry=0x7ff77b13dd90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ff83478c618 in QEventLoop::exec (this=this@entry=0x7ff77b13dd90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007ff83468e410 in QThread::exec (this=this@entry=0x2c3f900) at thread/qthread.cpp:542
#7  0x00007ff83476dedf in QInotifyFileSystemWatcherEngine::run (this=0x2c3f900) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007ff834690bec in QThreadPrivate::start (arg=0x2c3f900) at thread/qthread_unix.cpp:338
#9  0x00007ff82b706f8e in start_thread (arg=0x7ff77b13e700) at pthread_create.c:311
#10 0x00007ff837bdee1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7ff8382ea7c0 (LWP 2523)):
[KCrash Handler]
#6  QMetaObject::changeGuard (ptr=ptr@entry=0x47811a0, o=0x4782690) at kernel/qobject.cpp:460
#7  0x00007ff834113e44 in operator= (p=<optimized out>, this=0x47811a0) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#8  QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent (this=0x4780fc0, event=0x7fff25a74920) at graphicsview/qgraphicsproxywidget.cpp:284
#9  0x00007ff8340f2fb9 in QGraphicsItem::sceneEvent (this=0x47ab160, event=0x7fff25a74920) at graphicsview/qgraphicsitem.cpp:6742
#10 0x00007ff83411d640 in sendMouseEvent (mouseEvent=0x7fff25a74920, this=0x15f2d10) at graphicsview/qgraphicsscene.cpp:1295
#11 QGraphicsScenePrivate::sendMouseEvent (this=0x15f2d10, mouseEvent=0x7fff25a74920) at graphicsview/qgraphicsscene.cpp:1274
#12 0x00007ff834125da5 in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fff25a74920) at graphicsview/qgraphicsscene.cpp:4128
#13 0x00007ff8341313ec in QGraphicsScene::event (this=0x168ffa0, event=0x7fff25a74920) at graphicsview/qgraphicsscene.cpp:3458
#14 0x00007ff833b338ec in QApplicationPrivate::notify_helper (this=this@entry=0x156df30, receiver=receiver@entry=0x168ffa0, e=e@entry=0x7fff25a74920) at kernel/qapplication.cpp:4567
#15 0x00007ff833b3625b in QApplication::notify (this=this@entry=0x1566240, receiver=receiver@entry=0x168ffa0, e=e@entry=0x7fff25a74920) at kernel/qapplication.cpp:4428
#16 0x00007ff83544f916 in KApplication::notify (this=0x1566240, receiver=0x168ffa0, event=0x7fff25a74920) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007ff83478d63e in QCoreApplication::notifyInternal (this=0x1566240, receiver=0x168ffa0, event=0x7fff25a74920, event@entry=0x7fff25a74870) at kernel/qcoreapplication.cpp:946
#18 0x00007ff833b32226 in sendSpontaneousEvent (event=event@entry=0x7fff25a74870, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#19 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff25a74920) at kernel/qapplication.cpp:5565
#20 0x00007ff834148811 in QGraphicsView::mouseReleaseEvent (this=0x396b2c0, event=0x7fff25a75250) at graphicsview/qgraphicsview.cpp:3338
#21 0x00007ff833b80a89 in QWidget::event (this=this@entry=0x396b2c0, event=event@entry=0x7fff25a75250) at kernel/qwidget.cpp:8375
#22 0x00007ff833f33486 in QFrame::event (this=0x396b2c0, e=0x7fff25a75250) at widgets/qframe.cpp:557
#23 0x00007ff83414b24b in QGraphicsView::viewportEvent (this=0x396b2c0, event=0x7fff25a75250) at graphicsview/qgraphicsview.cpp:2866
#24 0x00007ff83478d7a6 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x156df30, receiver=receiver@entry=0x396d630, event=event@entry=0x7fff25a75250) at kernel/qcoreapplication.cpp:1056
#25 0x00007ff833b338bc in QApplicationPrivate::notify_helper (this=this@entry=0x156df30, receiver=receiver@entry=0x396d630, e=e@entry=0x7fff25a75250) at kernel/qapplication.cpp:4563
#26 0x00007ff833b36a33 in QApplication::notify (this=this@entry=0x1566240, receiver=receiver@entry=0x396d630, e=e@entry=0x7fff25a75250) at kernel/qapplication.cpp:4110
#27 0x00007ff83544f916 in KApplication::notify (this=0x1566240, receiver=0x396d630, event=0x7fff25a75250) at ../../kdeui/kernel/kapplication.cpp:311
#28 0x00007ff83478d63e in QCoreApplication::notifyInternal (this=0x1566240, receiver=receiver@entry=0x396d630, event=event@entry=0x7fff25a75250) at kernel/qcoreapplication.cpp:946
#29 0x00007ff833b39933 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x396d630, event=event@entry=0x7fff25a75250, alienWidget=alienWidget@entry=0x396d630, nativeWidget=nativeWidget@entry=0x396b2c0, buttonDown=buttonDown@entry=0x7ff834611308 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#31 0x00007ff833baee54 in QETWidget::translateMouseEvent (this=this@entry=0x396b2c0, event=event@entry=0x7fff25a759d0) at kernel/qapplication_x11.cpp:4631
#32 0x00007ff833bade81 in QApplication::x11ProcessEvent (this=0x1566240, event=event@entry=0x7fff25a759d0) at kernel/qapplication_x11.cpp:3746
#33 0x00007ff833bd9042 in x11EventSourceDispatch (s=0x156e570, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007ff82b003f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007ff82b004248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007ff82b004304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007ff8347bc016 in QEventDispatcherGlib::processEvents (this=0x14c2ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#38 0x00007ff833bd913e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#39 0x00007ff83478c38f in QEventLoop::processEvents (this=this@entry=0x7fff25a75da0, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007ff83478c618 in QEventLoop::exec (this=this@entry=0x7fff25a75da0, flags=...) at kernel/qeventloop.cpp:204
#41 0x00007ff834791cf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#42 0x00007ff833b31ffc in QApplication::exec () at kernel/qapplication.cpp:3828
#43 0x00007ff837eea3eb in kdemain (argc=1, argv=0x7fff25a76098) at ../../../../plasma/desktop/shell/main.cpp:126
#44 0x00007ff837b06ea5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fff25a76098, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff25a76088) at libc-start.c:260
#45 0x0000000000400711 in _start ()

Possible duplicates by query: bug 319031, bug 316992, bug 313431, bug 308852.

Reported using DrKonqi