Bug 334620

Application: plasma-desktop (4.11.8)
KDE Platform Version: 4.13.0
Qt Version: 4.8.6
Operating System: Linux 3.13.0-24-generic x86_64
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
I clicked on a minimized Konsole taskbar icon. I think I inadvertently dragged the icon a small distance (with a slashed-circle i.e. no valid drop point) and then immediately released the left mouse button so that I could start again & just click on the icon as I had intended. When I released the left mouse button, KDE desktop crashed.

The crash does not seem to be reproducible.

-- 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 0x7f19275567c0 (LWP 3094))]

Thread 4 (Thread 0x7f18fbae7700 (LWP 3096)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f19201feffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f19201ff039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f191aaab182 in start_thread (arg=0x7f18fbae7700) at pthread_create.c:312
#4  0x00007f1926e4c30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f187578a700 (LWP 3097)):
#0  0x00007f1926e3efbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f191a399fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f191a39a0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1923a147be in QEventDispatcherGlib::processEvents (this=0x7f18700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f19239e60af in QEventLoop::processEvents (this=this@entry=0x7f1875789de0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f19239e63a5 in QEventLoop::exec (this=this@entry=0x7f1875789de0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f19238e2c5f in QThread::exec (this=this@entry=0x1f0a0c0) at thread/qthread.cpp:537
#7  0x00007f19239c7823 in QInotifyFileSystemWatcherEngine::run (this=0x1f0a0c0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f19238e532f in QThreadPrivate::start (arg=0x1f0a0c0) at thread/qthread_unix.cpp:349
#9  0x00007f191aaab182 in start_thread (arg=0x7f187578a700) at pthread_create.c:312
#10 0x00007f1926e4c30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f186f7fe700 (LWP 3105)):
#0  0x00007f1926e3efbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f191a399fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f191a39a0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1923a147be in QEventDispatcherGlib::processEvents (this=0x7f18600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f19239e60af in QEventLoop::processEvents (this=this@entry=0x7f186f7fdde0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f19239e63a5 in QEventLoop::exec (this=this@entry=0x7f186f7fdde0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f19238e2c5f in QThread::exec (this=this@entry=0x20b5970) at thread/qthread.cpp:537
#7  0x00007f19239c7823 in QInotifyFileSystemWatcherEngine::run (this=0x20b5970) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f19238e532f in QThreadPrivate::start (arg=0x20b5970) at thread/qthread_unix.cpp:349
#9  0x00007f191aaab182 in start_thread (arg=0x7f186f7fe700) at pthread_create.c:312
#10 0x00007f1926e4c30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f19275567c0 (LWP 3094)):
[KCrash Handler]
#6  QDeclarativeError::isValid (this=0xa8) at qml/qdeclarativeerror.cpp:138
#7  0x00007f192564add0 in QDeclarativeExpression::hasError (this=<optimized out>) at qml/qdeclarativeexpression.cpp:769
#8  0x00007f192568530b in QDeclarativeBoundSignal::qt_metacall (this=0x19db550, c=<optimized out>, id=<optimized out>, a=0x7fff47564400) at qml/qdeclarativeboundsignal.cpp:200
#9  0x00007f19239fba78 in QMetaObject::activate (sender=sender@entry=0x4071c60, m=m@entry=0x7f187a987b20 <MouseEventListener::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff47564400) at kernel/qobject.cpp:3569
#10 0x00007f187a77e5f7 in positionChanged (_t1=0x7fff47564410, this=0x4071c60) at ./mouseeventlistener.moc:374
#11 MouseEventListener::mouseMoveEvent (this=0x4071c60, me=<optimized out>) at ../../../../plasma/declarativeimports/qtextracomponents/mouseeventlistener.cpp:121
#12 0x00007f192332a6d6 in QGraphicsItem::sceneEvent (this=this@entry=0x4071c70, event=event@entry=0x7fff475648b0) at graphicsview/qgraphicsitem.cpp:6749
#13 0x00007f19255e27c4 in QDeclarativeItem::sceneEvent (this=0x4071c60, event=0x7fff475648b0) at graphicsitems/qdeclarativeitem.cpp:3081
#14 0x00007f19233515af in QGraphicsScenePrivate::sendMouseEvent (this=0x1363f30, mouseEvent=0x7fff475648b0) at graphicsview/qgraphicsscene.cpp:1295
#15 0x00007f192335a176 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff475648b0) at graphicsview/qgraphicsscene.cpp:4102
#16 0x00007f192336605c in QGraphicsScene::event (this=0x13b6410, event=0x7fff475648b0) at graphicsview/qgraphicsscene.cpp:3451
#17 0x00007f1922d80e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1251400, receiver=receiver@entry=0x13b6410, e=e@entry=0x7fff475648b0) at kernel/qapplication.cpp:4567
#18 0x00007f1922d874a0 in QApplication::notify (this=this@entry=0x1235bd0, receiver=receiver@entry=0x13b6410, e=e@entry=0x7fff475648b0) at kernel/qapplication.cpp:4353
#19 0x00007f19246acbaa in KApplication::notify (this=0x1235bd0, receiver=0x13b6410, event=0x7fff475648b0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f19239e74dd in QCoreApplication::notifyInternal (this=0x1235bd0, receiver=0x13b6410, event=event@entry=0x7fff475648b0) at kernel/qcoreapplication.cpp:953
#21 0x00007f1922d7f556 in sendSpontaneousEvent (event=event@entry=0x7fff475648b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#22 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff475648b0) at kernel/qapplication.cpp:5565
#23 0x00007f192337b25c in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x2011480, event=event@entry=0x7fff47564f30) at graphicsview/qgraphicsview.cpp:646
#24 0x00007f192337c16a in QGraphicsView::mouseMoveEvent (this=0x1880a70, event=0x7fff47564f30) at graphicsview/qgraphicsview.cpp:3276
#25 0x00007f1922dd0635 in QWidget::event (this=this@entry=0x1880a70, event=event@entry=0x7fff47564f30) at kernel/qwidget.cpp:8361
#26 0x00007f1923171fce in QFrame::event (this=0x1880a70, e=0x7fff47564f30) at widgets/qframe.cpp:557
#27 0x00007f192337d7b9 in QGraphicsView::viewportEvent (this=0x1880a70, event=0x7fff47564f30) at graphicsview/qgraphicsview.cpp:2866
#28 0x00007f19239e7646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1251400, receiver=receiver@entry=0x2010a10, event=event@entry=0x7fff47564f30) at kernel/qcoreapplication.cpp:1063
#29 0x00007f1922d80e0c in QApplicationPrivate::notify_helper (this=this@entry=0x1251400, receiver=receiver@entry=0x2010a10, e=e@entry=0x7fff47564f30) at kernel/qapplication.cpp:4563
#30 0x00007f1922d875dd in QApplication::notify (this=this@entry=0x1235bd0, receiver=receiver@entry=0x2010a10, e=e@entry=0x7fff47564f30) at kernel/qapplication.cpp:4110
#31 0x00007f19246acbaa in KApplication::notify (this=0x1235bd0, receiver=0x2010a10, event=0x7fff47564f30) at ../../kdeui/kernel/kapplication.cpp:311
#32 0x00007f19239e74dd in QCoreApplication::notifyInternal (this=0x1235bd0, receiver=receiver@entry=0x2010a10, event=event@entry=0x7fff47564f30) at kernel/qcoreapplication.cpp:953
#33 0x00007f1922d86d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#34 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2010a10, event=event@entry=0x7fff47564f30, alienWidget=alienWidget@entry=0x2010a10, nativeWidget=nativeWidget@entry=0x1879bc0, buttonDown=buttonDown@entry=0x7f1923866318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#35 0x00007f1922dfbcfc in QETWidget::translateMouseEvent (this=this@entry=0x1879bc0, event=event@entry=0x7fff47565280) at kernel/qapplication_x11.cpp:4568
#36 0x00007f1922dfb269 in QApplication::x11ProcessEvent (this=0x1235bd0, event=event@entry=0x7fff47565280) at kernel/qapplication_x11.cpp:3627
#37 0x00007f1922e22b02 in x11EventSourceDispatch (s=0x1256530, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#38 0x00007f191a399e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f191a39a048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f191a39a0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f1923a147a1 in QEventDispatcherGlib::processEvents (this=0x11caaf0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#42 0x00007f1922e22bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#43 0x00007f19239e60af in QEventLoop::processEvents (this=this@entry=0x7fff47565650, flags=...) at kernel/qeventloop.cpp:149
#44 0x00007f19239e63a5 in QEventLoop::exec (this=this@entry=0x7fff47565650, flags=...) at kernel/qeventloop.cpp:204
#45 0x00007f19239ebb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#46 0x00007f1922d7f37c in QApplication::exec () at kernel/qapplication.cpp:3828
#47 0x00007f192715366c in kdemain (argc=1, argv=0x7fff475658a8) at ../../../../plasma/desktop/shell/main.cpp:126
#48 0x00007f1926d72ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7fff475658a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff47565898) at libc-start.c:287
#49 0x000000000040070e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 326879.

Possible duplicates by query: bug 334194, bug 333043, bug 332959, bug 332714, bug 332233.

Reported using DrKonqi