Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.13.0 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 3.13.0-27-generic i686
Distribution: Ubuntu 14.04 LTS

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

seen videos in firefox		

- Unusual behavior I noticed:

all programs stop widgets bar disappear, can't close windows

-- Backtrace:
Application: Shell da área de trabalho do Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb112ba40 (LWP 2608))]

Thread 5 (Thread 0xa3ba0b40 (LWP 2609)):
#0  0xb7725424 in __kernel_vsyscall ()
#1  0xb20d0d4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb75d48ec in __pthread_cond_wait (cond=0xb31de8d0, mutex=0xb31de8b8) at forward.c:149
#3  0xb30dbc92 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb30dbcdf in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb20ccf70 in start_thread (arg=0xa3ba0b40) at pthread_create.c:312
#6  0xb75c770e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 4 (Thread 0xa152fb40 (LWP 2613)):
#0  0xb20cf18a in __GI___pthread_mutex_lock (mutex=0xa0c00558) at ../nptl/pthread_mutex_lock.c:125
#1  0xb75d4af4 in pthread_mutex_lock (mutex=0xa0c00558) at forward.c:192
#2  0xb1ff5100 in g_mutex_lock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fb02b5 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fb0528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb603595f in QEventDispatcherGlib::processEvents (this=0xa0c00468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb6004823 in QEventLoop::processEvents (this=this@entry=0xa152f258, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6004b49 in QEventLoop::exec (this=this@entry=0xa152f258, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5ef123d in QThread::exec (this=this@entry=0x8a1cd68) at thread/qthread.cpp:537
#9  0xb5fe4c44 in QInotifyFileSystemWatcherEngine::run (this=0x8a1cd68) at io/qfilesystemwatcher_inotify.cpp:265
#10 0xb5ef3b6f in QThreadPrivate::start (arg=0x8a1cd68) at thread/qthread_unix.cpp:349
#11 0xb20ccf70 in start_thread (arg=0xa152fb40) at pthread_create.c:312
#12 0xb75c770e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 3 (Thread 0xa0594b40 (LWP 2614)):
#0  0xb20d013a in __pthread_mutex_unlock_usercnt (mutex=0x9fc00558, decr=<optimized out>) at pthread_mutex_unlock.c:93
#1  0xb75d4b34 in pthread_mutex_unlock (mutex=0x9fc00558) at forward.c:194
#2  0xb1ff5140 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fafdf2 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fb037a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb1fb0528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb603595f in QEventDispatcherGlib::processEvents (this=0x9fc00468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#7  0xb6004823 in QEventLoop::processEvents (this=this@entry=0xa0594258, flags=...) at kernel/qeventloop.cpp:149
#8  0xb6004b49 in QEventLoop::exec (this=this@entry=0xa0594258, flags=...) at kernel/qeventloop.cpp:204
#9  0xb5ef123d in QThread::exec (this=this@entry=0x8ac0e78) at thread/qthread.cpp:537
#10 0xb5fe4c44 in QInotifyFileSystemWatcherEngine::run (this=0x8ac0e78) at io/qfilesystemwatcher_inotify.cpp:265
#11 0xb5ef3b6f in QThreadPrivate::start (arg=0x8ac0e78) at thread/qthread_unix.cpp:349
#12 0xb20ccf70 in start_thread (arg=0xa0594b40) at pthread_create.c:312
#13 0xb75c770e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 2 (Thread 0x9e0f2b40 (LWP 2623)):
#0  0xb7725424 in __kernel_vsyscall ()
#1  0xb75b87ab in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0xb1fbf20b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fb03e8 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fb0528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb603595f in QEventDispatcherGlib::processEvents (this=0x9581748, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb6004823 in QEventLoop::processEvents (this=this@entry=0x9e0f2268, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6004b49 in QEventLoop::exec (this=this@entry=0x9e0f2268, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5ef123d in QThread::exec (this=0x8e51630) at thread/qthread.cpp:537
#9  0x9e5438c7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0xb5ef3b6f in QThreadPrivate::start (arg=0x8e51630) at thread/qthread_unix.cpp:349
#11 0xb20ccf70 in start_thread (arg=0x9e0f2b40) at pthread_create.c:312
#12 0xb75c770e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 1 (Thread 0xb112ba40 (LWP 2608)):
[KCrash Handler]
#7  ref (this=0xb53377c0 <__cxxabiv1::__class_type_info::~__class_type_info()>) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:120
#8  QUrl::operator= (this=this@entry=0x8c93220, url=...) at io/qurl.cpp:6163
#9  0xb6c549f2 in QDeclarativeError::operator= (this=this@entry=0xbfcc7514, other=...) at qml/qdeclarativeerror.cpp:117
#10 0xb6c54b09 in QDeclarativeError::QDeclarativeError (this=0xbfcc7514, other=...) at qml/qdeclarativeerror.cpp:104
#11 0xb6bfe26a in QDeclarativeExpression::error (this=0x97c9aa8) at qml/qdeclarativeexpression.cpp:794
#12 0xb6c3c5cf in QDeclarativeBoundSignal::qt_metacall (this=0x9d5b7f0, c=QMetaObject::InvokeMetaMethod, id=5, a=0xbfcc76a8) at qml/qdeclarativeboundsignal.cpp:201
#13 0xb600ce85 in QMetaObject::metacall (object=object@entry=0x9d5b7f0, cl=cl@entry=QMetaObject::InvokeMetaMethod, idx=5, argv=0xbfcc76a8) at kernel/qmetaobject.cpp:245
#14 0xb601b40d in QMetaObject::activate (sender=0x9c98978, m=0xa2e64d94, local_signal_index=0, argv=0xbfcc76a8) at kernel/qobject.cpp:3569
#15 0xa2e5c64f in ?? () from /usr/lib/kde4/imports/org/kde/qtextracomponents/libqtextracomponentsplugin.so
#16 0xb5b82853 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0x8471b18, item=item@entry=0x9ad48b8, event=event@entry=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:1159
#17 0xb5b875b8 in QGraphicsScenePrivate::sendEvent (this=0x8471b18, item=0x9ad48b8, event=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:1211
#18 0xb5b87b66 in QGraphicsScenePrivate::sendMouseEvent (this=0x8471b18, mouseEvent=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:1295
#19 0xb5b92ae7 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x8471b18, mouseEvent=mouseEvent@entry=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:1422
#20 0xb5b92fe7 in QGraphicsScene::mousePressEvent (this=0x83a2f50, mouseEvent=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:4074
#21 0xb5b9ca0f in QGraphicsScene::event (this=0x83a2f50, event=0xbfcc7bc0) at graphicsview/qgraphicsscene.cpp:3455
#22 0xb55117f4 in QApplicationPrivate::notify_helper (this=0x82953c8, receiver=0x83a2f50, e=0xbfcc7bc0) at kernel/qapplication.cpp:4567
#23 0xb55182d3 in QApplication::notify (this=0x828ac48, receiver=receiver@entry=0x83a2f50, e=e@entry=0xbfcc7bc0) at kernel/qapplication.cpp:4353
#24 0xb667a0a4 in KApplication::notify (this=0x828ac48, receiver=0x83a2f50, event=0xbfcc7bc0) at ../../kdeui/kernel/kapplication.cpp:311
#25 0xb6005e4a in QCoreApplication::notifyInternal (this=0x828ac48, receiver=receiver@entry=0x83a2f50, event=event@entry=0xbfcc7bc0) at kernel/qcoreapplication.cpp:953
#26 0xb550fc7d in sendSpontaneousEvent (event=0xbfcc7bc0, receiver=0x83a2f50) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#27 qt_sendSpontaneousEvent (receiver=0x83a2f50, event=event@entry=0xbfcc7bc0) at kernel/qapplication.cpp:5565
#28 0xb5bb61c5 in QGraphicsView::mousePressEvent (this=0x953ff60, event=0xbfcc80b4) at graphicsview/qgraphicsview.cpp:3164
#29 0xb556b1e3 in QWidget::event (this=this@entry=0x953ff60, event=event@entry=0xbfcc80b4) at kernel/qwidget.cpp:8372
#30 0xb597178c in QFrame::event (this=this@entry=0x953ff60, e=e@entry=0xbfcc80b4) at widgets/qframe.cpp:557
#31 0xb59ffe48 in QAbstractScrollArea::viewportEvent (this=this@entry=0x953ff60, e=e@entry=0xbfcc80b4) at widgets/qabstractscrollarea.cpp:1043
#32 0xb5bb7107 in QGraphicsView::viewportEvent (this=<optimized out>, event=<optimized out>) at graphicsview/qgraphicsview.cpp:2866
#33 0xb5a000c6 in viewportEvent (event=0xbfcc80b4, this=<optimized out>) at widgets/qabstractscrollarea_p.h:100
#34 QAbstractScrollAreaFilter::eventFilter (this=0x8f01698, o=0x93a4430, e=0xbfcc80b4) at widgets/qabstractscrollarea_p.h:116
#35 0xb6005fbe in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x82953c8, receiver=receiver@entry=0x93a4430, event=event@entry=0xbfcc80b4) at kernel/qcoreapplication.cpp:1063
#36 0xb55117d1 in QApplicationPrivate::notify_helper (this=0x82953c8, receiver=receiver@entry=0x93a4430, e=0xbfcc80b4) at kernel/qapplication.cpp:4563
#37 0xb5519ea0 in QApplication::notify (this=0x828ac48, receiver=receiver@entry=0x93a4430, e=e@entry=0xbfcc80b4) at kernel/qapplication.cpp:4110
#38 0xb667a0a4 in KApplication::notify (this=0x828ac48, receiver=0x93a4430, event=0xbfcc80b4) at ../../kdeui/kernel/kapplication.cpp:311
#39 0xb6005e4a in QCoreApplication::notifyInternal (this=0x828ac48, receiver=receiver@entry=0x93a4430, event=event@entry=0xbfcc80b4) at kernel/qcoreapplication.cpp:953
#40 0xb5517b53 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#41 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x93a4430, event=0xbfcc80b4, alienWidget=0x93a4430, nativeWidget=0x953ff60, buttonDown=buttonDown@entry=0xb5e88ce4 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#42 0xb559b778 in QETWidget::translateMouseEvent (this=0x953ff60, event=event@entry=0xbfcc82dc) at kernel/qapplication_x11.cpp:4634
#43 0xb559aec5 in QApplication::x11ProcessEvent (this=0x828ac48, event=event@entry=0xbfcc82dc) at kernel/qapplication_x11.cpp:3627
#44 0xb55c6524 in x11EventSourceDispatch (s=0x8292010, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#45 0xb1fb01e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#46 0xb1fb0468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#47 0xb1fb0528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#48 0xb603593b in QEventDispatcherGlib::processEvents (this=this@entry=0x822beb8, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#49 0xb55c65de in QGuiEventDispatcherGlib::processEvents (this=0x822beb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#50 0xb6004823 in QEventLoop::processEvents (this=this@entry=0xbfcc8598, flags=...) at kernel/qeventloop.cpp:149
#51 0xb6004b49 in QEventLoop::exec (this=this@entry=0xbfcc8598, flags=...) at kernel/qeventloop.cpp:204
#52 0xb600a8fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#53 0xb550fa24 in QApplication::exec () at kernel/qapplication.cpp:3828
#54 0xb76e1d27 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#55 0x0804855b in ?? ()
#56 0xb74f4a83 in __libc_start_main (main=0x8048540, argc=1, argv=0xbfcc8734, init=0x8048660 <__libc_csu_init>, fini=0x80486d0 <__libc_csu_fini>, rtld_fini=0xb7735180 <_dl_fini>, stack_end=0xbfcc872c) at libc-start.c:287
#57 0x0804857e in _start ()

Possible duplicates by query: bug 293177.

Reported using DrKonqi