This is happening since upgrade to 4.10.2, it was not an issue in 4.10.1 or before.
The plasma-desktop sometimes crashes. It happens frequently (but not always) when I minimise the Kontact window or while playing some kde games (e.g. picmi). Usually I get DrKonqi informing me about the crash but it says that the "backtrace" is not useful. I am attaching it anyway, because this crash happens frequently (>5 times per day). Usually the taskbar and desktop background reappears after a while, but occasionally it does not reappear and I have to kill KDE because there is no button to start new programs or log out.

Backtrace:
Application: plasma-desktop (0.4)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.7.10-gentoo-r1 x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
<Kerro yksityiskohtaisesti, mitä teit sovelluksen kaatuessa. >

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-työpöytäympäristö (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb049aca780 (LWP 19859))]

Thread 5 (Thread 0x7fb027b07700 (LWP 19860)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fb039e8ba2a in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7fb03a18ce80 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fb039e8ba69 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fb048307f26 in start_thread (arg=0x7fb027b07700) at pthread_create.c:305
#4  0x00007fb04705d4ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7fafa4964700 (LWP 19863)):
#0  0x00007fb0486cff00 in postEventSourcePrepare (s=0x7faf940012d0, timeout=0x7fafa4963c2c) at kernel/qeventdispatcher_glib.cpp:268
#1  0x00007fb043f3c389 in g_main_context_prepare (context=0x7faf940009a0, priority=0x7fafa4963c8c) at gmain.c:2836
#2  0x00007fb043f3cb23 in g_main_context_iterate (context=0x7faf940009a0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3126
#3  0x00007fb043f3cd0c in g_main_context_iteration (context=0x7faf940009a0, may_block=1) at gmain.c:3207
#4  0x00007fb0486d072e in QEventDispatcherGlib::processEvents (this=0x7faf940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007fb04869fdb2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fb0486a0037 in QEventLoop::exec (this=0x7fafa4963db0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fb04859ccbf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#8  0x00007fb04867f69f in QInotifyFileSystemWatcherEngine::run (this=0x1bc5410) at io/qfilesystemwatcher_inotify.cpp:256
#9  0x00007fb04859fd3c in QThreadPrivate::start (arg=0x1bc5410) at thread/qthread_unix.cpp:338
#10 0x00007fb048307f26 in start_thread (arg=0x7fafa4964700) at pthread_create.c:305
#11 0x00007fb04705d4ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7faf9d2db700 (LWP 19864)):
#0  0x00007fb043f3c3c2 in g_main_context_prepare (context=0x7faf8c0009a0, priority=0x7faf9d2dac8c) at gmain.c:2853
#1  0x00007fb043f3cb23 in g_main_context_iterate (context=0x7faf8c0009a0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3126
#2  0x00007fb043f3cd0c in g_main_context_iteration (context=0x7faf8c0009a0, may_block=1) at gmain.c:3207
#3  0x00007fb0486d072e in QEventDispatcherGlib::processEvents (this=0x7faf8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fb04869fdb2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb0486a0037 in QEventLoop::exec (this=0x7faf9d2dadb0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb04859ccbf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007fb04867f69f in QInotifyFileSystemWatcherEngine::run (this=0x1ddb3d0) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007fb04859fd3c in QThreadPrivate::start (arg=0x1ddb3d0) at thread/qthread_unix.cpp:338
#9  0x00007fb048307f26 in start_thread (arg=0x7faf9d2db700) at pthread_create.c:305
#10 0x00007fb04705d4ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7faf87fff700 (LWP 19870)):
#0  0x00007fb04830ba8f in __pthread_mutex_unlock_usercnt (mutex=0x7faf800013c0, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  0x00007fb043f7ac91 in g_mutex_unlock (mutex=<optimized out>) at gthread-posix.c:227
#2  0x00007fb043f3c37f in g_main_context_prepare (context=0x7faf80003090, priority=0x7faf87ffec8c) at gmain.c:2834
#3  0x00007fb043f3cb23 in g_main_context_iterate (context=0x7faf80003090, block=1, dispatch=1, self=<optimized out>) at gmain.c:3126
#4  0x00007fb043f3cd0c in g_main_context_iteration (context=0x7faf80003090, may_block=1) at gmain.c:3207
#5  0x00007fb0486d072e in QEventDispatcherGlib::processEvents (this=0x7faf800031c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fb04869fdb2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fb0486a0037 in QEventLoop::exec (this=0x7faf87ffedb0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fb04859ccbf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007fb04867f69f in QInotifyFileSystemWatcherEngine::run (this=0x16833f0) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007fb04859fd3c in QThreadPrivate::start (arg=0x16833f0) at thread/qthread_unix.cpp:338
#11 0x00007fb048307f26 in start_thread (arg=0x7faf87fff700) at pthread_create.c:305
#12 0x00007fb04705d4ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7fb049aca780 (LWP 19859)):
[KCrash Handler]
#6  0x00007fb0486b7ef7 in QMetaObject::addGuard (ptr=0x7fffd656a620) at kernel/qobject.cpp:400
#7  0x00007fb03967797b in QPointer (p=..., this=0x7fffd656a620) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:62
#8  takeAt (i=4, this=0x4d6e038) at ../../include/QtCore/../../src/corelib/tools/qlist.h:486
#9  QDeclarativeRepeater::itemsRemoved (this=0x4d6dd80, index=4, count=0) at graphicsitems/qdeclarativerepeater.cpp:407
#10 0x00007fb0486b5441 in QMetaObject::activate (sender=0x4d6e650, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656a7a0) at kernel/qobject.cpp:3539
#11 0x00007fb0397c1c5f in QDeclarativeVisualModel::itemsRemoved (this=<optimized out>, _t1=4, _t2=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:161
#12 0x00007fb03968dcfe in QDeclarativeVisualDataModel::_q_itemsRemoved (this=0x4d6e650, index=4, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1314
#13 0x00007fb0397c2359 in QDeclarativeVisualDataModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:401
#14 0x00007fb0486b5441 in QMetaObject::activate (sender=0x32b17e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656a9e0) at kernel/qobject.cpp:3539
#15 0x00007fb0397b567f in QListModelInterface::itemsRemoved (this=<optimized out>, _t1=4, _t2=1) at .moc/release-shared/moc_qlistmodelinterface_p.cpp:114
#16 0x00007fb0395f4eb7 in QDeclarativeListModel::remove (this=0x32b17e0, index=4) at util/qdeclarativelistmodel.cpp:402
#17 0x00007fb0397b4253 in QDeclarativeListModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:76
#18 0x00007fb0397b437f in QDeclarativeListModel::qt_metacall (this=0x32b17e0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7fffd656acf0) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:123
#19 0x00007fb03975d5d0 in QDeclarativeObjectMethodScriptClass::callMethod (this=0x1d18d60, object=0x32b17e0, index=10, returnType=<optimized out>, argCount=1, argTypes=0x7fffd656af10, ctxt=0x7faf78d8d2a8) at qml/qdeclarativeobjectscriptclass.cpp:970
#20 0x00007fb03975f15e in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x1d18d60, object=0x32b17e0, data=..., ctxt=0x7faf78d8d2a8) at qml/qdeclarativeobjectscriptclass.cpp:944
#21 0x00007fb03975fc63 in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#22 0x00007fb039f03c28 in QScript::DeclarativeObjectDelegate::call (exec=<optimized out>, callee=0x7faf78087740, thisValue=..., args=...) at bridge/qscriptdeclarativeobject.cpp:154
#23 0x00007fb039e03148 in QTJSC::NativeFuncWrapper::operator() (this=0x7fffd656b120, exec=0x7faf78d8d2a8, jsobj=0x7faf78087740, thisValue=..., argList=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:46
#24 0x00007fb039dd9e24 in QTJSC::cti_op_call_NotJSFunction (args=0x7fffd656b170) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:1780
#25 0x00007fafa73fe858 in ?? ()
#26 0x00007fb02bda5478 in ?? ()
#27 0x00007faf78087740 in ?? ()
#28 0x00007faf0000000b in ?? ()
#29 0x0000000000000002 in ?? ()
#30 0x7fffffff00000001 in ?? ()
#31 0x00007faf841082a0 in ?? ()
#32 0x00007faf795d8e70 in ?? ()
#33 0x00007faf840d0c80 in ?? ()
#34 0x00007faf84104700 in ?? ()
#35 0x00007fafa73fe620 in ?? ()
#36 0x00007faf795d8e88 in ?? ()
#37 0x00007faf78d8d2a8 in ?? ()
#38 0x00007faf795efa88 in ?? ()
#39 0x00007fb03a18cd88 in QTJSC::ExecutableAllocator::pageSize () from /usr/lib64/qt4/libQtScript.so.4
#40 0x00007faf795ee800 in ?? ()
#41 0x00007faf78d8d208 in ?? ()
#42 0x00007faf84104700 in ?? ()
#43 0x00007faf795ee800 in ?? ()
#44 0x00007faf78d8d208 in ?? ()
#45 0x00007faf78d8d250 in ?? ()
#46 0x00007faf795d8e70 in ?? ()
#47 0x00007fb039d94481 in execute (exception=0x7faf795efa88, globalData=0xffff000000000000, callFrame=0x200, registerFile=0x7faf795d8e88, this=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITCode.h:79
#48 QTJSC::Interpreter::execute (this=0x7fffd656b210, functionExecutable=0xffff000000000002, callFrame=0x7faf78d8d250, function=0x7faf78087680, thisObj=<optimized out>, args=..., scopeChain=0x7faf841082a0, exception=0x7faf795efa88) at ../3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp:716
#49 0x00007fb039e2e7b6 in QTJSC::JSFunction::call (this=0x7faf78087680, exec=0x7faf78d8d208, thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp:122
#50 0x00007fb039e03181 in QTJSC::call (exec=<optimized out>, functionObject=..., callType=<optimized out>, callData=..., thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:62
#51 0x00007fb039ee73ea in QScriptValue::call (this=<optimized out>, thisObject=..., args=...) at api/qscriptvalue.cpp:1604
#52 0x00007fb0396c6ac7 in QDeclarativeQtScriptExpression::eval (this=0x4b9f238, secondaryScope=<optimized out>, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:518
#53 0x00007fb0396c8e7f in QDeclarativeQtScriptExpression::scriptValue (this=0x4b9f238, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:470
#54 0x00007fb0396c91aa in QDeclarativeExpressionPrivate::scriptValue (this=0x4b9f1b0, secondaryScope=0x0, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:653
#55 0x00007fb0396c92e2 in QDeclarativeExpressionPrivate::value (this=0x4b9f1b0, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:667
#56 0x00007fb039701221 in QDeclarativeBoundSignal::qt_metacall (this=0x7f23cb0, c=<optimized out>, id=<optimized out>, a=0x7fffd656b7d0) at qml/qdeclarativeboundsignal.cpp:199
#57 0x00007fb0486b5649 in QMetaObject::activate (sender=0x84513f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3558
#58 0x00007fb0395fef2d in QDeclarativeTimer::finished (this=0x84513f0) at util/qdeclarativetimer.cpp:318
#59 0x00007fb0486b5441 in QMetaObject::activate (sender=0x810a090, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#60 0x00007fb048582c48 in QAbstractAnimationPrivate::setState (this=0x810a0b0, newState=<optimized out>) at animation/qabstractanimation.cpp:604
#61 0x00007fb048582fff in updateAnimationsTime (this=0x1aa9710) at animation/qabstractanimation.cpp:235
#62 QUnifiedTimer::updateAnimationsTime (this=0x1aa9710) at animation/qabstractanimation.cpp:207
#63 0x00007fb048582b80 in QAbstractAnimationPrivate::setState (this=0x765c770, newState=QAbstractAnimation::Running) at animation/qabstractanimation.cpp:588
#64 0x00007fb0395fea47 in QDeclarativeTimer::update (this=0x227dfb0) at util/qdeclarativetimer.cpp:279
#65 0x00007fb0396d3743 in QDeclarativeComponentPrivate::complete (enginePriv=0x2c437b0, state=0x4d6e538) at qml/qdeclarativecomponent.cpp:962
#66 0x00007fb0396d3daf in QDeclarativeComponentPrivate::completeCreate (this=<optimized out>) at qml/qdeclarativecomponent.cpp:1043
#67 0x00007fb03968e57c in QDeclarativeVisualDataModel::item (this=0x4d6e650, index=0, viewId=..., complete=true) at graphicsitems/qdeclarativevisualitemmodel.cpp:1069
#68 0x00007fb03968e93b in QDeclarativeVisualDataModel::item (this=<optimized out>, index=0, complete=true) at graphicsitems/qdeclarativevisualitemmodel.cpp:958
#69 0x00007fb039676bd6 in QDeclarativeRepeater::itemsInserted (this=0x4d6dd80, index=0, count=1) at graphicsitems/qdeclarativerepeater.cpp:386
#70 0x00007fb0486b5441 in QMetaObject::activate (sender=0x4d6e650, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656bfc0) at kernel/qobject.cpp:3539
#71 0x00007fb0397c1bff in QDeclarativeVisualModel::itemsInserted (this=<optimized out>, _t1=0, _t2=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:154
#72 0x00007fb03968d115 in QDeclarativeVisualDataModel::_q_itemsInserted (this=0x4d6e650, index=0, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1282
#73 0x00007fb0397c2341 in QDeclarativeVisualDataModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:400
#74 0x00007fb0486b5441 in QMetaObject::activate (sender=0x32b17e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656c1f0) at kernel/qobject.cpp:3539
#75 0x00007fb0397b561c in QListModelInterface::itemsInserted (this=<optimized out>, _t1=0, _t2=1) at .moc/release-shared/moc_qlistmodelinterface_p.cpp:107
#76 0x00007fb0395f3baa in QDeclarativeListModel::insert (this=0x32b17e0, index=0, valuemap=...) at util/qdeclarativelistmodel.cpp:436
#77 0x00007fb0397b422f in QDeclarativeListModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:78
#78 0x00007fb0397b437f in QDeclarativeListModel::qt_metacall (this=0x32b17e0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7fffd656c540) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:123
#79 0x00007fb03975d5d0 in QDeclarativeObjectMethodScriptClass::callMethod (this=0x1d18d60, object=0x32b17e0, index=12, returnType=<optimized out>, argCount=2, argTypes=0x7fffd656c760, ctxt=0x7faf78d8d208) at qml/qdeclarativeobjectscriptclass.cpp:970
#80 0x00007fb03975f15e in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x1d18d60, object=0x32b17e0, data=..., ctxt=0x7faf78d8d208) at qml/qdeclarativeobjectscriptclass.cpp:944
#81 0x00007fb03975fc63 in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#82 0x00007fb039f03c28 in QScript::DeclarativeObjectDelegate::call (exec=<optimized out>, callee=0x7faf78083640, thisValue=..., args=...) at bridge/qscriptdeclarativeobject.cpp:154
#83 0x00007fb039e03148 in QTJSC::NativeFuncWrapper::operator() (this=0x7fffd656c970, exec=0x7faf78d8d208, jsobj=0x7faf78083640, thisValue=..., argList=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:46
#84 0x00007fb039dd9e24 in QTJSC::cti_op_call_NotJSFunction (args=0x7fffd656c9c0) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:1780
#85 0x00007fafa72e29b3 in ?? ()
#86 0x0000000000000016 in ?? ()
#87 0x00007faf78083640 in ?? ()
#88 0x00007faf0000000e in ?? ()
#89 0x00007faf00000003 in ?? ()
#90 0x00007faf00000003 in ?? ()
#91 0x0000000000000010 in ?? ()
#92 0x0000000008421a20 in ?? ()
#93 0x0000000000000066 in ?? ()
#94 0x0000000007858e00 in ?? ()
#95 0x00007fafa72e0000 in ?? ()
#96 0x00007faf795d8e88 in ?? ()
#97 0x00007faf78d8d208 in ?? ()
#98 0x00007faf795efa88 in ?? ()
#99 0x00007fb03a18cd88 in QTJSC::ExecutableAllocator::pageSize () from /usr/lib64/qt4/libQtScript.so.4
#100 0x00007faf795ee800 in ?? ()
#101 0x00007faf78d8d0a0 in ?? ()
#102 0x00007faf840609a0 in ?? ()
#103 0x00007faf795ee800 in ?? ()
#104 0x00007faf78d8d0a0 in ?? ()
#105 0x00007faf78d8d0e8 in ?? ()
#106 0x00007faf795d8e70 in ?? ()
#107 0x00007fb039d94481 in execute (exception=0x7faf795efa88, globalData=0xffff000000000000, callFrame=0x1fa, registerFile=0x7faf795d8e88, this=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITCode.h:79
#108 QTJSC::Interpreter::execute (this=0x7fffd656ca60, functionExecutable=0xffff000000000002, callFrame=0x7faf78d8d198, function=0x7faf78d29c40, thisObj=<optimized out>, args=..., scopeChain=0x7faf84059d80, exception=0x7faf795efa88) at ../3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp:716
#109 0x00007fb039e2e7b6 in QTJSC::JSFunction::call (this=0x7faf78d29c40, exec=0x7faf78d8d0a0, thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp:122
#110 0x00007fb039e03181 in QTJSC::call (exec=<optimized out>, functionObject=..., callType=<optimized out>, callData=..., thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:62
#111 0x00007fb039ee73ea in QScriptValue::call (this=<optimized out>, thisObject=..., args=...) at api/qscriptvalue.cpp:1604
#112 0x00007fb0396c6ac7 in QDeclarativeQtScriptExpression::eval (this=0x32b4d28, secondaryScope=<optimized out>, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:518
#113 0x00007fb0396c8e7f in QDeclarativeQtScriptExpression::scriptValue (this=0x32b4d28, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:470
#114 0x00007fb0396c91aa in QDeclarativeExpressionPrivate::scriptValue (this=0x32b4ca0, secondaryScope=0x1924a30, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:653
#115 0x00007fb0396c92e2 in QDeclarativeExpressionPrivate::value (this=0x32b4ca0, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:667
#116 0x00007fb039701221 in QDeclarativeBoundSignal::qt_metacall (this=0x32b46a0, c=<optimized out>, id=<optimized out>, a=0x7fffd656d0a0) at qml/qdeclarativeboundsignal.cpp:199
#117 0x00007fb0486b5649 in QMetaObject::activate (sender=0x4cbe6c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656d0a0) at kernel/qobject.cpp:3558
#118 0x00007fafa6a07ba7 in Plasma::DataSource::newData (this=<optimized out>, _t1=..., _t2=...) at /tmp/portage/kde-base/plasma-runtime-4.10.2/work/plasma-runtime-4.10.2_build/plasma/declarativeimports/core/datasource.moc:204
#119 0x00007fafa6a07f02 in Plasma::DataSource::dataUpdated (this=0x4cbe6c0, sourceName=..., data=...) at /tmp/portage/kde-base/plasma-runtime-4.10.2/work/plasma-runtime-4.10.2/plasma/declarativeimports/core/datasource.cpp:146
#120 0x00007fb0486a8f28 in QMetaMethod::invoke (this=0x7fffd656d620, object=0x4cbe6c0, connectionType=Qt::DirectConnection, returnValue=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1664
#121 0x00007fb0486ab307 in QMetaObject::invokeMethod (obj=0x4cbe6c0, member=<optimized out>, type=Qt::AutoConnection, ret=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1179
#122 0x00007fb03bed9969 in invokeMethod (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=..., val2=..., val1=..., val0=..., member=0x7fb03c059bc1 "dataUpdated", obj=0x4cbe6c0) at /usr/include/qt4/QtCore/qobjectdefs.h:434
#123 Plasma::DataEnginePrivate::connectSource (this=<optimized out>, s=0x6851880, visualization=0x4cbe6c0, pollingInterval=<optimized out>, align=Plasma::NoAlignment, immediateCall=true) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/plasma/dataengine.cpp:674
#124 0x00007fb03bedafcb in Plasma::DataEngine::connectSource (this=0x32b0180, source=..., visualization=0x4cbe6c0, pollingInterval=0, intervalAlignment=Plasma::NoAlignment) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/plasma/dataengine.cpp:106
#125 0x00007fafa6a07da4 in Plasma::DataSource::connectSource (this=<optimized out>, source=...) at /tmp/portage/kde-base/plasma-runtime-4.10.2/work/plasma-runtime-4.10.2/plasma/declarativeimports/core/datasource.cpp:193
#126 0x00007fafa6a08e7f in Plasma::DataSource::qt_metacall (this=0x4cbe6c0, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x7fffd656db00) at /tmp/portage/kde-base/plasma-runtime-4.10.2/work/plasma-runtime-4.10.2_build/plasma/declarativeimports/core/datasource.moc:158
#127 0x00007fb03975d5d0 in QDeclarativeObjectMethodScriptClass::callMethod (this=0x1d18d60, object=0x4cbe6c0, index=18, returnType=<optimized out>, argCount=1, argTypes=0x7fffd656dd20, ctxt=0x7faf78d8d0a0) at qml/qdeclarativeobjectscriptclass.cpp:970
#128 0x00007fb03975f15e in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x1d18d60, object=0x4cbe6c0, data=..., ctxt=0x7faf78d8d0a0) at qml/qdeclarativeobjectscriptclass.cpp:944
#129 0x00007fb03975fc63 in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#130 0x00007fb039f03c28 in QScript::DeclarativeObjectDelegate::call (exec=<optimized out>, callee=0x7faf78081140, thisValue=..., args=...) at bridge/qscriptdeclarativeobject.cpp:154
#131 0x00007fb039e03148 in QTJSC::NativeFuncWrapper::operator() (this=0x7fffd656df30, exec=0x7faf78d8d0a0, jsobj=0x7faf78081140, thisValue=..., argList=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:46
#132 0x00007fb039dd9e24 in QTJSC::cti_op_call_NotJSFunction (args=0x7fffd656df80) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:1780
#133 0x00007fafa72ac000 in ?? ()
#134 0x0000000007a9a4d0 in ?? ()
#135 0x00007faf78081140 in ?? ()
#136 0x000000000000000b in ?? ()
#137 0x0000000000000002 in ?? ()
#138 0x000000000060d600 in ?? ()
#139 0x0000000000000008 in ?? ()
#140 0x0000000006887f80 in ?? ()
#141 0x00000000033eb450 in ?? ()
#142 0x0000000006886e40 in ?? ()
#143 0x00007fafa72abe70 in ?? ()
#144 0x00007faf795d8e88 in ?? ()
#145 0x00007faf78d8d0a0 in ?? ()
#146 0x00007faf795efa88 in ?? ()
#147 0x00007fb03a18cd88 in QTJSC::ExecutableAllocator::pageSize () from /usr/lib64/qt4/libQtScript.so.4
#148 0x00007faf795ee800 in ?? ()
#149 0x00007faf78d8d000 in ?? ()
#150 0x00007faf84060a80 in ?? ()
#151 0x00007faf795ee800 in ?? ()
#152 0x0000000002c43558 in ?? ()
#153 0x00007faf78d8d048 in ?? ()
#154 0x00007faf795d8e70 in ?? ()
#155 0x00007fb039d94481 in execute (exception=0x7faf795efa88, globalData=0xffff000000000000, callFrame=0x200, registerFile=0x7faf795d8e88, this=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITCode.h:79
#156 QTJSC::Interpreter::execute (this=0x7fffd656e020, functionExecutable=0xffff000000000002, callFrame=0x7faf78d8d048, function=0x7faf78d29a40, thisObj=<optimized out>, args=..., scopeChain=0x7faf84059e70, exception=0x7faf795efa88) at ../3rdparty/javascriptcore/JavaScriptCore/interpreter/Interpreter.cpp:716
#157 0x00007fb039e2e7b6 in QTJSC::JSFunction::call (this=0x7faf78d29a40, exec=0x2c43558, thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.cpp:122
#158 0x00007fb039e03181 in QTJSC::call (exec=<optimized out>, functionObject=..., callType=<optimized out>, callData=..., thisValue=..., args=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:62
#159 0x00007fb039ee73ea in QScriptValue::call (this=<optimized out>, thisObject=..., args=...) at api/qscriptvalue.cpp:1604
#160 0x00007fb0396c6ac7 in QDeclarativeQtScriptExpression::eval (this=0x42f0fc8, secondaryScope=<optimized out>, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:518
#161 0x00007fb0396c8e7f in QDeclarativeQtScriptExpression::scriptValue (this=0x42f0fc8, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:470
#162 0x00007fb0396c91aa in QDeclarativeExpressionPrivate::scriptValue (this=0x42f0f40, secondaryScope=0x6d63fe0, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:653
#163 0x00007fb0396c92e2 in QDeclarativeExpressionPrivate::value (this=0x42f0f40, secondaryScope=<optimized out>, isUndefined=<optimized out>) at qml/qdeclarativeexpression.cpp:667
#164 0x00007fb039701221 in QDeclarativeBoundSignal::qt_metacall (this=0x42ef8e0, c=<optimized out>, id=<optimized out>, a=0x7fffd656e660) at qml/qdeclarativeboundsignal.cpp:199
#165 0x00007fb0486b5649 in QMetaObject::activate (sender=0x4cbe6c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffd656e660) at kernel/qobject.cpp:3558
#166 0x00007fafa6a07be5 in Plasma::DataSource::sourceAdded (this=<optimized out>, _t1=...) at /tmp/portage/kde-base/plasma-runtime-4.10.2/work/plasma-runtime-4.10.2_build/plasma/declarativeimports/core/datasource.moc:211
#167 0x00007fb0486ba5fe in QObject::event (this=0x4cbe6c0, e=<optimized out>) at kernel/qobject.cpp:1194
#168 0x00007fb047802cd4 in notify_helper (e=0x4dde5a0, receiver=0x4cbe6c0, this=0x1700480) at kernel/qapplication.cpp:4562
#169 QApplicationPrivate::notify_helper (this=0x1700480, receiver=0x4cbe6c0, e=0x4dde5a0) at kernel/qapplication.cpp:4534
#170 0x00007fb047807a33 in QApplication::notify (this=0x16f86e0, receiver=0x4cbe6c0, e=0x4dde5a0) at kernel/qapplication.cpp:4423
#171 0x00007fb0494ac428 in KApplication::notify (this=0x16f86e0, receiver=0x4cbe6c0, event=0x4dde5a0) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kdeui/kernel/kapplication.cpp:311
#172 0x00007fb0486a130b in QCoreApplication::notifyInternal (this=0x16f86e0, receiver=0x4cbe6c0, event=0x4dde5a0) at kernel/qcoreapplication.cpp:946
#173 0x00007fb0486a4c29 in sendEvent (event=0x4dde5a0, receiver=0x4cbe6c0) at kernel/qcoreapplication.h:231
#174 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x15c12b0) at kernel/qcoreapplication.cpp:1570
#175 0x00007fb0486d02f3 in sendPostedEvents () at kernel/qcoreapplication.h:236
#176 postEventSourceDispatch (s=0x1713160) at kernel/qeventdispatcher_glib.cpp:279
#177 0x00007fb043f3c8fa in g_main_dispatch (context=0x165f3a0) at gmain.c:2539
#178 g_main_context_dispatch (context=0x165f3a0) at gmain.c:3075
#179 0x00007fb043f3cc58 in g_main_context_iterate (context=0x165f3a0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3146
#180 0x00007fb043f3cd0c in g_main_context_iteration (context=0x165f3a0, may_block=1) at gmain.c:3207
#181 0x00007fb0486d06d6 in QEventDispatcherGlib::processEvents (this=0x16ee3a0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#182 0x00007fb0478a7006 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#183 0x00007fb04869fdb2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#184 0x00007fb0486a0037 in QEventLoop::exec (this=0x7fffd656efa0, flags=...) at kernel/qeventloop.cpp:204
#185 0x00007fb0486a4f25 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#186 0x00007fb03300e7e5 in kdemain (argc=1, argv=0x15c37b0) at /tmp/portage/kde-base/plasma-workspace-4.10.2/work/plasma-workspace-4.10.2/plasma/desktop/shell/main.cpp:126
#187 0x0000000000408b3c in launch (argc=1, _name=0x1615878 "/usr/bin/plasma-desktop", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40b546 "0") at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kinit/kinit.cpp:726
#188 0x0000000000409bf6 in handle_launcher_request (sock=7, who=<optimized out>) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kinit/kinit.cpp:1218
#189 0x000000000040a143 in handle_requests (waitForPid=0) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kinit/kinit.cpp:1411
#190 0x0000000000405acd in main (argc=2, argv=0x7fffd656ff80, envp=0x7fffd6570250) at /tmp/portage/kde-base/kdelibs-4.10.2/work/kdelibs-4.10.2/kinit/kinit.cpp:1899

Ilmoita osoitteeseen https://bugs.kde.org/