Bug 257217

Application: plasma-netbook (0.1)
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-22-generic x86_64
Distribution: Ubuntu 10.10

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

I was running a find command piped to grep that was hogging the entire I/O subsystem of the netbook, as far as I can tell.  I don't know if QT has a condition dependent upon timing or what, but this crash did happen under load.

-- Backtrace:
Application: Plasma Netbook (plasma-netbook), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fc769ec1780 (LWP 1609))]

Thread 7 (Thread 0x7fc74adbe710 (LWP 1646)):
#0  0x00007fc7698303b4 in pthread_mutex_unlock (mutex=0x2a9be48) at forward.c:184
#1  0x00007fc75f4f9a05 in g_main_context_prepare () from /lib/libglib-2.0.so.0
#2  0x00007fc75f4f9e78 in ?? () from /lib/libglib-2.0.so.0
#3  0x00007fc75f4fa45c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#4  0x00007fc7670641e6 in QEventDispatcherGlib::processEvents (this=0x2a9bd50, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007fc767036a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fc767036dec in QEventLoop::exec (this=0x7fc74adbdd90, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fc766f412fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007fc7670165f8 in QInotifyFileSystemWatcherEngine::run (this=0x2ab2170) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fc766f4427e in QThreadPrivate::start (arg=0x2ab2170) at thread/qthread_unix.cpp:266
#10 0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#11 0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fc746bca710 (LWP 1650)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc76571420e in ?? () from /usr/lib/libQtWebKit.so.4
#2  0x00007fc765714329 in ?? () from /usr/lib/libQtWebKit.so.4
#3  0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#4  0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fc743312710 (LWP 1779)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc766f44e3b in wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc763f13524 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2b572c0, th=0x37849b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc763f1672b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2bbac30, th=0x37849b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc763f14c9f in ThreadWeaver::ThreadRunHelper::run (this=0x7fc743311de0, parent=0x2b572c0, th=0x37849b0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc763f151f8 in ThreadWeaver::Thread::run (this=0x37849b0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc766f4427e in QThreadPrivate::start (arg=0x37849b0) at thread/qthread_unix.cpp:266
#8  0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#9  0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fc735638710 (LWP 1780)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc766f44e3b in wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc763f13524 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2b572c0, th=0x39aa470) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc763f1672b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2bbac30, th=0x39aa470) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc763f14c9f in ThreadWeaver::ThreadRunHelper::run (this=0x7fc735637de0, parent=0x2b572c0, th=0x39aa470) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc763f151f8 in ThreadWeaver::Thread::run (this=0x39aa470) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc766f4427e in QThreadPrivate::start (arg=0x39aa470) at thread/qthread_unix.cpp:266
#8  0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#9  0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc734e37710 (LWP 1781)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc766f44e3b in wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc763f13524 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2b572c0, th=0x38383d0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc763f1672b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2bbac30, th=0x38383d0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc763f14c9f in ThreadWeaver::ThreadRunHelper::run (this=0x7fc734e36de0, parent=0x2b572c0, th=0x38383d0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc763f151f8 in ThreadWeaver::Thread::run (this=0x38383d0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc766f4427e in QThreadPrivate::start (arg=0x38383d0) at thread/qthread_unix.cpp:266
#8  0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#9  0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc734636710 (LWP 1782)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc766f44e3b in wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x2b571f0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc763f13524 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2b572c0, th=0x314a090) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc763f1672b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2bbac30, th=0x314a090) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc763f14c9f in ThreadWeaver::ThreadRunHelper::run (this=0x7fc734635de0, parent=0x2b572c0, th=0x314a090) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc763f151f8 in ThreadWeaver::Thread::run (this=0x314a090) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc766f4427e in QThreadPrivate::start (arg=0x314a090) at thread/qthread_unix.cpp:266
#8  0x00007fc761c7e971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#9  0x00007fc76982094d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc769ec1780 (LWP 1609)):
[KCrash Handler]
#6  0x00007fc76704aaf5 in QMetaObject::changeGuard (ptr=0x4cf66a0, o=0x69f6090) at kernel/qobject.cpp:455
#7  0x00007fc7669dc783 in operator= (this=0x4cf64c0, event=0x7fff26be0160) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#8  QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent (this=0x4cf64c0, event=0x7fff26be0160) at graphicsview/qgraphicsproxywidget.cpp:284
#9  0x00007fc7669c9fb4 in QGraphicsItem::sceneEvent (this=0x4549d60, event=0x20) at graphicsview/qgraphicsitem.cpp:6669
#10 0x00007fc7669e1cf8 in QGraphicsScenePrivate::sendMouseEvent (this=0x24272a0, mouseEvent=0x7fff26be0160) at graphicsview/qgraphicsscene.cpp:1285
#11 0x00007fc7669e5325 in QGraphicsScene::mouseReleaseEvent (this=<value optimized out>, mouseEvent=0x7fff26be0160) at graphicsview/qgraphicsscene.cpp:4111
#12 0x00007fc7669f61ef in QGraphicsScene::event (this=0x2394ae0, event=0x7fff26be0160) at graphicsview/qgraphicsscene.cpp:3444
#13 0x00007fc76639efdc in QApplicationPrivate::notify_helper (this=0x232f6f0, receiver=0x2394ae0, e=0x7fff26be0160) at kernel/qapplication.cpp:4396
#14 0x00007fc7663a4aed in QApplication::notify (this=0x2324a20, receiver=0x2394ae0, e=0x7fff26be0160) at kernel/qapplication.cpp:4277
#15 0x00007fc767cd3156 in KApplication::notify (this=0x2324a20, receiver=0x2394ae0, event=0x7fff26be0160) at ../../kdeui/kernel/kapplication.cpp:310
#16 0x00007fc767037cdc in QCoreApplication::notifyInternal (this=0x2324a20, receiver=0x2394ae0, event=0x7fff26be0160) at kernel/qcoreapplication.cpp:732
#17 0x00007fc766a144a5 in QGraphicsView::mouseReleaseEvent (this=0x2d89e90, event=0x7fff26be0ba0) at graphicsview/qgraphicsview.cpp:3334
#18 0x00007fc7663f504e in QWidget::event (this=0x2d89e90, event=0x7fff26be0ba0) at kernel/qwidget.cpp:8187
#19 0x00007fc7667c05e6 in QFrame::event (this=0x2d89e90, e=0x7fff26be0ba0) at widgets/qframe.cpp:557
#20 0x00007fc766a1287b in QGraphicsView::viewportEvent (this=0x2d89e90, event=0x7fff26be0ba0) at graphicsview/qgraphicsview.cpp:2862
#21 0x00007fc767037507 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x33b6620, event=0x7fff26be0ba0) at kernel/qcoreapplication.cpp:847
#22 0x00007fc76639efac in QApplicationPrivate::notify_helper (this=0x232f6f0, receiver=0x33b6620, e=0x7fff26be0ba0) at kernel/qapplication.cpp:4392
#23 0x00007fc7663a530e in QApplication::notify (this=0x2324a20, receiver=0x33b6620, e=0x7fff26be0ba0) at kernel/qapplication.cpp:3959
#24 0x00007fc767cd3156 in KApplication::notify (this=0x2324a20, receiver=0x33b6620, event=0x7fff26be0ba0) at ../../kdeui/kernel/kapplication.cpp:310
#25 0x00007fc767037cdc in QCoreApplication::notifyInternal (this=0x2324a20, receiver=0x33b6620, event=0x7fff26be0ba0) at kernel/qcoreapplication.cpp:732
#26 0x00007fc7663a3dbe in sendEvent (receiver=0x33b6620, event=0x7fff26be0ba0, alienWidget=0x33b6620, nativeWidget=0x2d89e90, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#27 QApplicationPrivate::sendMouseEvent (receiver=0x33b6620, event=0x7fff26be0ba0, alienWidget=0x33b6620, nativeWidget=0x2d89e90, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, spontaneous=true) at kernel/qapplication.cpp:3058
#28 0x00007fc766427345 in QETWidget::translateMouseEvent (this=0x2d89e90, event=<value optimized out>) at kernel/qapplication_x11.cpp:4403
#29 0x00007fc766425c5c in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff26be14c0) at kernel/qapplication_x11.cpp:3536
#30 0x00007fc7664520e2 in x11EventSourceDispatch (s=0x2333060, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#31 0x00007fc75f4f6342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0x00007fc75f4fa2a8 in ?? () from /lib/libglib-2.0.so.0
#33 0x00007fc75f4fa45c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0x00007fc767064193 in QEventDispatcherGlib::processEvents (this=0x2305070, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415
#35 0x00007fc766451a4e in QGuiEventDispatcherGlib::processEvents (this=0x7fc769ab8e40, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007fc767036a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#37 0x00007fc767036dec in QEventLoop::exec (this=0x7fff26be17f0, flags=) at kernel/qeventloop.cpp:201
#38 0x00007fc76703aebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#39 0x00007fc769ad286e in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/netbook/shell/main.cpp:67
#40 0x00007fc769758d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff26be1c18) at libc-start.c:226
#41 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 251023.

Possible duplicates by query: bug 252309, bug 251023.

Reported using DrKonqi