Bug 331121

Application: plasma-desktop (4.12.2)
KDE Platform Version: 4.12.2
Qt Version: 4.8.6
Operating System: Linux 3.13.0-8-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

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

Drag and drop cpufreq changer widget to plasma desktop and this crash.

-- Backtrace:
Application: Shell de escritorio Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8fd17d47c0 (LWP 1779))]

Thread 6 (Thread 0x7f8fa8bd8700 (LWP 1783)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f8fca57affb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f8fca57b039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f8fc4e27182 in start_thread (arg=0x7f8fa8bd8700) at pthread_create.c:312
#4  0x00007f8fd11d3b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f8f22a6f700 (LWP 1786)):
#0  0x00007fffb81fea1f in ?? ()
#1  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f8f1bfff700 (LWP 1787)):
#0  0x00007f8fd11c4e4d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f8fc475b910 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8fc471b894 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8fc471bcfb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8fc471be6c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8fcdd9a836 in QEventDispatcherGlib::processEvents (this=0x7f8f140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#6  0x00007f8fcdd6c09f in QEventLoop::processEvents (this=this@entry=0x7f8f1bffede0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f8fcdd6c395 in QEventLoop::exec (this=this@entry=0x7f8f1bffede0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f8fcdc68c4f in QThread::exec (this=this@entry=0x1d4b0d0) at thread/qthread.cpp:537
#9  0x00007f8fcdd4d813 in QInotifyFileSystemWatcherEngine::run (this=0x1d4b0d0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f8fcdc6b31f in QThreadPrivate::start (arg=0x1d4b0d0) at thread/qthread_unix.cpp:349
#11 0x00007f8fc4e27182 in start_thread (arg=0x7f8f1bfff700) at pthread_create.c:312
#12 0x00007f8fd11d3b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f8f1310d700 (LWP 1788)):
#0  0x00007f8fc4e2a7ee in __pthread_mutex_unlock_usercnt (decr=1, mutex=0x7f8f0c000a60) at pthread_mutex_unlock.c:57
#1  __GI___pthread_mutex_unlock (mutex=0x7f8f0c000a60) at pthread_mutex_unlock.c:310
#2  0x00007f8fc475c691 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8fc471b679 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8fc471bcd2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8fc471be6c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f8fcdd9a836 in QEventDispatcherGlib::processEvents (this=0x7f8f0c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#7  0x00007f8fcdd6c09f in QEventLoop::processEvents (this=this@entry=0x7f8f1310cde0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f8fcdd6c395 in QEventLoop::exec (this=this@entry=0x7f8f1310cde0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f8fcdc68c4f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#10 0x00007f8f1adac027 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#11 0x00007f8fcdc6b31f in QThreadPrivate::start (arg=0x1301a40) at thread/qthread_unix.cpp:349
#12 0x00007f8fc4e27182 in start_thread (arg=0x7f8f1310d700) at pthread_create.c:312
#13 0x00007f8fd11d3b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f8f0a82a700 (LWP 2881)):
#0  0x00007f8fc475c31a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8fc475c659 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8fc471b5fb in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8fc471bcd2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8fc471c08a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8efbb48ff6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f8fc4740c35 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f8fc4e27182 in start_thread (arg=0x7f8f0a82a700) at pthread_create.c:312
#8  0x00007f8fd11d3b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f8fd17d47c0 (LWP 1779)):
[KCrash Handler]
#6  0x00007f8fcdd815f7 in isSignalConnected (signal_index=31, this=0x0) at kernel/qobject_p.h:237
#7  QMetaObject::activate (sender=sender@entry=0x56f6870, m=m@entry=0x7f8f2733e820 <DeclarativeDragArea::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7fffb808e570) at kernel/qobject.cpp:3444
#8  0x00007f8f27137561 in DeclarativeDragArea::drop (this=this@entry=0x56f6870, _t1=2) at moc_DeclarativeDragArea.cpp:233
#9  0x00007f8f27139c72 in DeclarativeDragArea::mouseMoveEvent (this=0x56f6870, event=<optimized out>) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:234
#10 0x00007f8f27139d21 in DeclarativeDragArea::sceneEventFilter (this=0x56f6870, item=0x571b0c0, event=0x7fffb808ea90) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:245
#11 0x00007f8fcd6d0aa5 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0x12f7160, item=item@entry=0x571b0c0, event=event@entry=0x7fffb808ea90) at graphicsview/qgraphicsscene.cpp:1159
#12 0x00007f8fcd6d50ee in QGraphicsScenePrivate::sendEvent (this=0x12f7160, item=0x571b0c0, event=0x7fffb808ea90) at graphicsview/qgraphicsscene.cpp:1211
#13 0x00007f8fcd6d55ef in QGraphicsScenePrivate::sendMouseEvent (this=0x12f7160, mouseEvent=0x7fffb808ea90) at graphicsview/qgraphicsscene.cpp:1295
#14 0x00007f8fcd6de1b6 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fffb808ea90) at graphicsview/qgraphicsscene.cpp:4102
#15 0x00007f8fcd6ea09c in QGraphicsScene::event (this=0x1314890, event=0x7fffb808ea90) at graphicsview/qgraphicsscene.cpp:3451
#16 0x00007f8fcd104e2c in QApplicationPrivate::notify_helper (this=this@entry=0x11af590, receiver=receiver@entry=0x1314890, e=e@entry=0x7fffb808ea90) at kernel/qapplication.cpp:4567
#17 0x00007f8fcd10b4a0 in QApplication::notify (this=this@entry=0x11a3720, receiver=receiver@entry=0x1314890, e=e@entry=0x7fffb808ea90) at kernel/qapplication.cpp:4353
#18 0x00007f8fcea33aaa in KApplication::notify (this=0x11a3720, receiver=0x1314890, event=0x7fffb808ea90) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f8fcdd6d4cd in QCoreApplication::notifyInternal (this=0x11a3720, receiver=0x1314890, event=event@entry=0x7fffb808ea90) at kernel/qcoreapplication.cpp:953
#20 0x00007f8fcd103556 in sendSpontaneousEvent (event=event@entry=0x7fffb808ea90, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#21 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fffb808ea90) at kernel/qapplication.cpp:5565
#22 0x00007f8fcd6ff29c in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x3a81520, event=event@entry=0x7fffb808f0e0) at graphicsview/qgraphicsview.cpp:646
#23 0x00007f8fcd7001aa in QGraphicsView::mouseMoveEvent (this=0x487c760, event=0x7fffb808f0e0) at graphicsview/qgraphicsview.cpp:3276
#24 0x00007f8fcd154635 in QWidget::event (this=this@entry=0x487c760, event=event@entry=0x7fffb808f0e0) at kernel/qwidget.cpp:8361
#25 0x00007f8fcd4f5fee in QFrame::event (this=0x487c760, e=0x7fffb808f0e0) at widgets/qframe.cpp:557
#26 0x00007f8fcd7017f9 in QGraphicsView::viewportEvent (this=0x487c760, event=0x7fffb808f0e0) at graphicsview/qgraphicsview.cpp:2866
#27 0x00007f8fcdd6d636 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x11af590, receiver=receiver@entry=0x39ec340, event=event@entry=0x7fffb808f0e0) at kernel/qcoreapplication.cpp:1063
#28 0x00007f8fcd104e0c in QApplicationPrivate::notify_helper (this=this@entry=0x11af590, receiver=receiver@entry=0x39ec340, e=e@entry=0x7fffb808f0e0) at kernel/qapplication.cpp:4563
#29 0x00007f8fcd10b5dd in QApplication::notify (this=this@entry=0x11a3720, receiver=receiver@entry=0x39ec340, e=e@entry=0x7fffb808f0e0) at kernel/qapplication.cpp:4110
#30 0x00007f8fcea33aaa in KApplication::notify (this=0x11a3720, receiver=0x39ec340, event=0x7fffb808f0e0) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f8fcdd6d4cd in QCoreApplication::notifyInternal (this=0x11a3720, receiver=receiver@entry=0x39ec340, event=event@entry=0x7fffb808f0e0) at kernel/qcoreapplication.cpp:953
#32 0x00007f8fcd10ad93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x39ec340, event=event@entry=0x7fffb808f0e0, alienWidget=alienWidget@entry=0x39ec340, nativeWidget=nativeWidget@entry=0x41be260, buttonDown=buttonDown@entry=0x7f8fcdbec578 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#34 0x00007f8fcd17f9cb in QETWidget::translateMouseEvent (this=this@entry=0x41be260, event=event@entry=0x7fffb808f460) at kernel/qapplication_x11.cpp:4634
#35 0x00007f8fcd17f269 in QApplication::x11ProcessEvent (this=0x11a3720, event=event@entry=0x7fffb808f460) at kernel/qapplication_x11.cpp:3627
#36 0x00007f8fcd1a6b02 in x11EventSourceDispatch (s=0x11b0320, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x00007f8fc471bb84 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f8fc471bdc8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f8fc471be6c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f8fcdd9a815 in QEventDispatcherGlib::processEvents (this=0x111faf0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#41 0x00007f8fcd1a6bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f8fcdd6c09f in QEventLoop::processEvents (this=this@entry=0x7fffb808f830, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f8fcdd6c395 in QEventLoop::exec (this=this@entry=0x7fffb808f830, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f8fcdd71b69 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#45 0x00007f8fcd10337c in QApplication::exec () at kernel/qapplication.cpp:3828
#46 0x00007f8fd14dc65c in kdemain (argc=1, argv=0x7fffb808fa88) at ../../../../plasma/desktop/shell/main.cpp:126
#47 0x00007f8fd10faed5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7fffb808fa88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb808fa78) at libc-start.c:287
#48 0x000000000040070e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 310523.

Possible duplicates by query: bug 325274, bug 322930, bug 320686, bug 318857, bug 318171.

Reported using DrKonqi