Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-38-generic x86_64
Distribution: Linux Mint 17.2 Rafaela

-- Information about the crash:
Sometimes when you add to the standard bottom screen panel, the icon for showing extra virtual desktops, the icon gets a blocked red circle and it sticks on it so you cant place the virtual desktops icon anywhere... then you click on ESC key to exit and the crash happens

The crash can be reproduced sometimes.

-- 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 0x7f4c48dba7c0 (LWP 2037))]

Thread 5 (Thread 0x7f4c1e25d700 (LWP 2046)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4c41a68ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f4c41a69039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f4c3c5df182 in start_thread (arg=0x7f4c1e25d700) at pthread_create.c:312
#4  0x00007f4c486aa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f4b9837f700 (LWP 2047)):
#0  0x00007f4c4869d12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4c3becdfe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4c3bece0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4c4527e7be in QEventDispatcherGlib::processEvents (this=0x7f4b900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f4c452500af in QEventLoop::processEvents (this=this@entry=0x7f4b9837ede0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4c452503a5 in QEventLoop::exec (this=this@entry=0x7f4b9837ede0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f4c4514cc5f in QThread::exec (this=this@entry=0x1566140) at thread/qthread.cpp:537
#7  0x00007f4c45231823 in QInotifyFileSystemWatcherEngine::run (this=0x1566140) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f4c4514f32f in QThreadPrivate::start (arg=0x1566140) at thread/qthread_unix.cpp:349
#9  0x00007f4c3c5df182 in start_thread (arg=0x7f4b9837f700) at pthread_create.c:312
#10 0x00007f4c486aa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f4b964ae700 (LWP 2049)):
#0  0x00007f4c3bf0f61a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4c3bf0f979 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4c3becd0b0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4c3becdea5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4c3bece30a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4b96faa336 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f4c3bef2f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f4c3c5df182 in start_thread (arg=0x7f4b964ae700) at pthread_create.c:312
#8  0x00007f4c486aa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f4b95635700 (LWP 2050)):
#0  0x00007f4c486b8066 in pthread_mutex_unlock (mutex=0x7f4b80000a60) at forward.c:194
#1  0x00007f4c3bf0f9b1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4c3becd680 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4c3becdf03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4c3bece0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4c4527e7be in QEventDispatcherGlib::processEvents (this=0x7f4b800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007f4c452500af in QEventLoop::processEvents (this=this@entry=0x7f4b95634de0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f4c452503a5 in QEventLoop::exec (this=this@entry=0x7f4b95634de0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f4c4514cc5f in QThread::exec (this=this@entry=0xf14920) at thread/qthread.cpp:537
#9  0x00007f4c45231823 in QInotifyFileSystemWatcherEngine::run (this=0xf14920) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f4c4514f32f in QThreadPrivate::start (arg=0xf14920) at thread/qthread_unix.cpp:349
#11 0x00007f4c3c5df182 in start_thread (arg=0x7f4b95635700) at pthread_create.c:312
#12 0x00007f4c486aa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f4c48dba7c0 (LWP 2037)):
[KCrash Handler]
#6  0x00007f4c45265607 in isSignalConnected (signal_index=31, this=0x0) at kernel/qobject_p.h:237
#7  QMetaObject::activate (sender=sender@entry=0x3525900, m=m@entry=0x7f4b9d08e860 <DeclarativeDragArea::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x7ffc5c4ae0f0) at kernel/qobject.cpp:3444
#8  0x00007f4b9ce87561 in DeclarativeDragArea::drop (this=this@entry=0x3525900, _t1=0) at moc_DeclarativeDragArea.cpp:233
#9  0x00007f4b9ce89c72 in DeclarativeDragArea::mouseMoveEvent (this=0x3525900, event=<optimized out>) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:234
#10 0x00007f4b9ce89d21 in DeclarativeDragArea::sceneEventFilter (this=0x3525900, item=0x2f668d0, event=0x7ffc5c4ae610) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:245
#11 0x00007f4c44bb6b25 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0xcacf20, item=item@entry=0x2f668d0, event=event@entry=0x7ffc5c4ae610) at graphicsview/qgraphicsscene.cpp:1159
#12 0x00007f4c44bbb14e in QGraphicsScenePrivate::sendEvent (this=0xcacf20, item=0x2f668d0, event=0x7ffc5c4ae610) at graphicsview/qgraphicsscene.cpp:1211
#13 0x00007f4c44bbb64f in QGraphicsScenePrivate::sendMouseEvent (this=0xcacf20, mouseEvent=0x7ffc5c4ae610) at graphicsview/qgraphicsscene.cpp:1295
#14 0x00007f4c44bc4216 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7ffc5c4ae610) at graphicsview/qgraphicsscene.cpp:4102
#15 0x00007f4c44bd00fc in QGraphicsScene::event (this=0xc6a770, event=0x7ffc5c4ae610) at graphicsview/qgraphicsscene.cpp:3451
#16 0x00007f4c445eae2c in QApplicationPrivate::notify_helper (this=this@entry=0xb26b00, receiver=receiver@entry=0xc6a770, e=e@entry=0x7ffc5c4ae610) at kernel/qapplication.cpp:4567
#17 0x00007f4c445f14a0 in QApplication::notify (this=this@entry=0xb19190, receiver=receiver@entry=0xc6a770, e=e@entry=0x7ffc5c4ae610) at kernel/qapplication.cpp:4353
#18 0x00007f4c45f16cca in KApplication::notify (this=0xb19190, receiver=0xc6a770, event=0x7ffc5c4ae610) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f4c452514dd in QCoreApplication::notifyInternal (this=0xb19190, receiver=0xc6a770, event=event@entry=0x7ffc5c4ae610) at kernel/qcoreapplication.cpp:953
#20 0x00007f4c445e9556 in sendSpontaneousEvent (event=event@entry=0x7ffc5c4ae610, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#21 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7ffc5c4ae610) at kernel/qapplication.cpp:5565
#22 0x00007f4c44be52fc in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x3b65960, event=event@entry=0x7ffc5c4aec60) at graphicsview/qgraphicsview.cpp:646
#23 0x00007f4c44be620a in QGraphicsView::mouseMoveEvent (this=0x3ec6bc0, event=0x7ffc5c4aec60) at graphicsview/qgraphicsview.cpp:3276
#24 0x00007f4c4463a645 in QWidget::event (this=this@entry=0x3ec6bc0, event=event@entry=0x7ffc5c4aec60) at kernel/qwidget.cpp:8361
#25 0x00007f4c449dc04e in QFrame::event (this=0x3ec6bc0, e=0x7ffc5c4aec60) at widgets/qframe.cpp:557
#26 0x00007f4c44be7859 in QGraphicsView::viewportEvent (this=0x3ec6bc0, event=0x7ffc5c4aec60) at graphicsview/qgraphicsview.cpp:2866
#27 0x00007f4c45251646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0xb26b00, receiver=receiver@entry=0x3ea9290, event=event@entry=0x7ffc5c4aec60) at kernel/qcoreapplication.cpp:1063
#28 0x00007f4c445eae0c in QApplicationPrivate::notify_helper (this=this@entry=0xb26b00, receiver=receiver@entry=0x3ea9290, e=e@entry=0x7ffc5c4aec60) at kernel/qapplication.cpp:4563
#29 0x00007f4c445f15dd in QApplication::notify (this=this@entry=0xb19190, receiver=receiver@entry=0x3ea9290, e=e@entry=0x7ffc5c4aec60) at kernel/qapplication.cpp:4110
#30 0x00007f4c45f16cca in KApplication::notify (this=0xb19190, receiver=0x3ea9290, event=0x7ffc5c4aec60) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f4c452514dd in QCoreApplication::notifyInternal (this=0xb19190, receiver=receiver@entry=0x3ea9290, event=event@entry=0x7ffc5c4aec60) at kernel/qcoreapplication.cpp:953
#32 0x00007f4c445f0d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x3ea9290, event=event@entry=0x7ffc5c4aec60, alienWidget=alienWidget@entry=0x3ea9290, nativeWidget=nativeWidget@entry=0x3f205a0, buttonDown=buttonDown@entry=0x7f4c450d0318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#34 0x00007f4c446659eb in QETWidget::translateMouseEvent (this=this@entry=0x3f205a0, event=event@entry=0x7ffc5c4aefe0) at kernel/qapplication_x11.cpp:4634
#35 0x00007f4c44665289 in QApplication::x11ProcessEvent (this=0xb19190, event=event@entry=0x7ffc5c4aefe0) at kernel/qapplication_x11.cpp:3627
#36 0x00007f4c4468cb32 in x11EventSourceDispatch (s=0xb21f60, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x00007f4c3becde04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f4c3bece048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f4c3bece0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f4c4527e7a1 in QEventDispatcherGlib::processEvents (this=0xa9b990, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#41 0x00007f4c4468cbe6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f4c452500af in QEventLoop::processEvents (this=this@entry=0x3457930, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f4c452503a5 in QEventLoop::exec (this=this@entry=0x3457930, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f4c446750bd in QDragManager::drag (this=0x3a8c080, o=o@entry=0x337e070) at kernel/qdnd_x11.cpp:2032
#45 0x00007f4c445fbe3a in QDrag::exec (this=this@entry=0x337e070, supportedActions=..., defaultDropAction=Qt::MoveAction) at kernel/qdrag.cpp:284
#46 0x00007f4b9ce89c68 in DeclarativeDragArea::mouseMoveEvent (this=0x3a91890, event=<optimized out>) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:233
#47 0x00007f4b9ce89d21 in DeclarativeDragArea::sceneEventFilter (this=0x3a91890, item=0x3c54140, event=0x7ffc5c4afa00) at ../../../../plasma/declarativeimports/draganddrop/DeclarativeDragArea.cpp:245
#48 0x00007f4c44bb6b25 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0xcacf20, item=item@entry=0x3c54140, event=event@entry=0x7ffc5c4afa00) at graphicsview/qgraphicsscene.cpp:1159
#49 0x00007f4c44bbb14e in QGraphicsScenePrivate::sendEvent (this=0xcacf20, item=0x3c54140, event=0x7ffc5c4afa00) at graphicsview/qgraphicsscene.cpp:1211
#50 0x00007f4c44bbb64f in QGraphicsScenePrivate::sendMouseEvent (this=0xcacf20, mouseEvent=0x7ffc5c4afa00) at graphicsview/qgraphicsscene.cpp:1295
#51 0x00007f4c44bc4216 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7ffc5c4afa00) at graphicsview/qgraphicsscene.cpp:4102
#52 0x00007f4c44bd00fc in QGraphicsScene::event (this=0xc6a770, event=0x7ffc5c4afa00) at graphicsview/qgraphicsscene.cpp:3451
#53 0x00007f4c445eae2c in QApplicationPrivate::notify_helper (this=this@entry=0xb26b00, receiver=receiver@entry=0xc6a770, e=e@entry=0x7ffc5c4afa00) at kernel/qapplication.cpp:4567
#54 0x00007f4c445f14a0 in QApplication::notify (this=this@entry=0xb19190, receiver=receiver@entry=0xc6a770, e=e@entry=0x7ffc5c4afa00) at kernel/qapplication.cpp:4353
#55 0x00007f4c45f16cca in KApplication::notify (this=0xb19190, receiver=0xc6a770, event=0x7ffc5c4afa00) at ../../kdeui/kernel/kapplication.cpp:311
#56 0x00007f4c452514dd in QCoreApplication::notifyInternal (this=0xb19190, receiver=0xc6a770, event=event@entry=0x7ffc5c4afa00) at kernel/qcoreapplication.cpp:953
#57 0x00007f4c445e9556 in sendSpontaneousEvent (event=event@entry=0x7ffc5c4afa00, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#58 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7ffc5c4afa00) at kernel/qapplication.cpp:5565
#59 0x00007f4c44be52fc in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x3072dd0, event=event@entry=0x7ffc5c4b0050) at graphicsview/qgraphicsview.cpp:646
#60 0x00007f4c44be620a in QGraphicsView::mouseMoveEvent (this=0x2edf3d0, event=0x7ffc5c4b0050) at graphicsview/qgraphicsview.cpp:3276
#61 0x00007f4c4463a645 in QWidget::event (this=this@entry=0x2edf3d0, event=event@entry=0x7ffc5c4b0050) at kernel/qwidget.cpp:8361
#62 0x00007f4c449dc04e in QFrame::event (this=0x2edf3d0, e=0x7ffc5c4b0050) at widgets/qframe.cpp:557
#63 0x00007f4c44be7859 in QGraphicsView::viewportEvent (this=0x2edf3d0, event=0x7ffc5c4b0050) at graphicsview/qgraphicsview.cpp:2866
#64 0x00007f4c45251646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0xb26b00, receiver=receiver@entry=0x2ed56f0, event=event@entry=0x7ffc5c4b0050) at kernel/qcoreapplication.cpp:1063
#65 0x00007f4c445eae0c in QApplicationPrivate::notify_helper (this=this@entry=0xb26b00, receiver=receiver@entry=0x2ed56f0, e=e@entry=0x7ffc5c4b0050) at kernel/qapplication.cpp:4563
#66 0x00007f4c445f15dd in QApplication::notify (this=this@entry=0xb19190, receiver=receiver@entry=0x2ed56f0, e=e@entry=0x7ffc5c4b0050) at kernel/qapplication.cpp:4110
#67 0x00007f4c45f16cca in KApplication::notify (this=0xb19190, receiver=0x2ed56f0, event=0x7ffc5c4b0050) at ../../kdeui/kernel/kapplication.cpp:311
#68 0x00007f4c452514dd in QCoreApplication::notifyInternal (this=0xb19190, receiver=receiver@entry=0x2ed56f0, event=event@entry=0x7ffc5c4b0050) at kernel/qcoreapplication.cpp:953
#69 0x00007f4c445f0d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#70 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2ed56f0, event=event@entry=0x7ffc5c4b0050, alienWidget=alienWidget@entry=0x2ed56f0, nativeWidget=nativeWidget@entry=0x2e7c4f0, buttonDown=buttonDown@entry=0x7f4c450d0318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#71 0x00007f4c446659eb in QETWidget::translateMouseEvent (this=this@entry=0x2e7c4f0, event=event@entry=0x7ffc5c4b03d0) at kernel/qapplication_x11.cpp:4634
#72 0x00007f4c44665289 in QApplication::x11ProcessEvent (this=0xb19190, event=event@entry=0x7ffc5c4b03d0) at kernel/qapplication_x11.cpp:3627
#73 0x00007f4c4468cb32 in x11EventSourceDispatch (s=0xb21f60, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#74 0x00007f4c3becde04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f4c3bece048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f4c3bece0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007f4c4527e7a1 in QEventDispatcherGlib::processEvents (this=0xa9b990, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#78 0x00007f4c4468cbe6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#79 0x00007f4c452500af in QEventLoop::processEvents (this=this@entry=0x7ffc5c4b07a0, flags=...) at kernel/qeventloop.cpp:149
#80 0x00007f4c452503a5 in QEventLoop::exec (this=this@entry=0x7ffc5c4b07a0, flags=...) at kernel/qeventloop.cpp:204
#81 0x00007f4c45255b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#82 0x00007f4c445e937c in QApplication::exec () at kernel/qapplication.cpp:3828
#83 0x00007f4c489b167c in kdemain (argc=1, argv=0x7ffc5c4b09f8) at ../../../../plasma/desktop/shell/main.cpp:126
#84 0x00007f4c485d1ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7ffc5c4b09f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc5c4b09e8) at libc-start.c:287
#85 0x000000000040070e in _start ()

Reported using DrKonqi