Application: plasma-windowed (0.1)
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:
I think that this bug leads to a memory leak linux!

The crash can be reproduced sometimes.

-- Backtrace:
Application: Оболочка для виджетов Plasma (plasma-windowed), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9e02ca47c0 (LWP 6504))]

Thread 2 (Thread 0x7f9dddf2c700 (LWP 6505)):
#0  0x00007f9df8cd67ee in __pthread_mutex_unlock_usercnt (decr=1, mutex=0x7f9dd8000a60) at pthread_mutex_unlock.c:57
#1  __GI___pthread_mutex_unlock (mutex=0x7f9dd8000a60) at pthread_mutex_unlock.c:310
#2  0x00007f9df86449b1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9df8602a59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9df8602f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9df86030ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f9e011d47be in QEventDispatcherGlib::processEvents (this=0x7f9dd80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#7  0x00007f9e011a60af in QEventLoop::processEvents (this=this@entry=0x7f9dddf2bde0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f9e011a63a5 in QEventLoop::exec (this=this@entry=0x7f9dddf2bde0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f9e010a2c5f in QThread::exec (this=this@entry=0x15a7410) at thread/qthread.cpp:537
#10 0x00007f9e01187823 in QInotifyFileSystemWatcherEngine::run (this=0x15a7410) at io/qfilesystemwatcher_inotify.cpp:265
#11 0x00007f9e010a532f in QThreadPrivate::start (arg=0x15a7410) at thread/qthread_unix.cpp:349
#12 0x00007f9df8cd3182 in start_thread (arg=0x7f9dddf2c700) at pthread_create.c:312
#13 0x00007f9e0260247d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f9e02ca47c0 (LWP 6504)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f9e00aded76 in QGraphicsItem::dragLeaveEvent (this=0x15252b0, event=0x1) at graphicsview/qgraphicsitem.cpp:6890
#8  0x00007f9dd7a64bec in sipQGraphicsProxyWidget::focusNextPrevChild (this=0x1c08e50, a0=<optimized out>) at sipQtGuipart6.cpp:28682
#9  0x00007f9e00af2039 in QGraphicsItemPrivate::setVisibleHelper (this=0x1c08ed0, newVisible=newVisible@entry=false, explicitly=explicitly@entry=false, update=update@entry=true) at graphicsview/qgraphicsitem.cpp:2324
#10 0x00007f9e00af1bf9 in QGraphicsItemPrivate::setVisibleHelper (this=0x1a57120, newVisible=false, explicitly=explicitly@entry=true, update=update@entry=true) at graphicsview/qgraphicsitem.cpp:2355
#11 0x00007f9e00af20e7 in QGraphicsItem::setVisible (this=this@entry=0x1a597b0, visible=<optimized out>) at graphicsview/qgraphicsitem.cpp:2453
#12 0x00007f9e00b08e5b in QGraphicsProxyWidget::eventFilter (this=0x1a597a0, object=0x1526710, event=0x7fffae9b6810) at graphicsview/qgraphicsproxywidget.cpp:958
#13 0x00007f9e011a7646 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1372530, receiver=receiver@entry=0x1526710, event=event@entry=0x7fffae9b6810) at kernel/qcoreapplication.cpp:1063
#14 0x00007f9e00540e0c in QApplicationPrivate::notify_helper (this=this@entry=0x1372530, receiver=receiver@entry=0x1526710, e=e@entry=0x7fffae9b6810) at kernel/qapplication.cpp:4563
#15 0x00007f9e005474a0 in QApplication::notify (this=this@entry=0x1353970, receiver=receiver@entry=0x1526710, e=e@entry=0x7fffae9b6810) at kernel/qapplication.cpp:4353
#16 0x00007f9e01bf1cca in KApplication::notify (this=0x1353970, receiver=0x1526710, event=0x7fffae9b6810) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f9e011a74dd in QCoreApplication::notifyInternal (this=0x1353970, receiver=receiver@entry=0x1526710, event=event@entry=0x7fffae9b6810) at kernel/qcoreapplication.cpp:953
#18 0x00007f9e0058c63d in sendEvent (event=0x7fffae9b6810, receiver=0x1526710) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QWidgetPrivate::hide_helper (this=this@entry=0x1a53530) at kernel/qwidget.cpp:7642
#20 0x00007f9e0058f8a8 in QWidget::setVisible (this=0x1526710, visible=<optimized out>) at kernel/qwidget.cpp:7815
#21 0x00007f9e0058c924 in hide (this=0x1526710) at ../../include/QtGui/../../src/gui/kernel/qwidget.h:501
#22 QWidgetPrivate::close_helper (this=this@entry=0x1a53530, mode=mode@entry=QWidgetPrivate::CloseNoEvent) at kernel/qwidget.cpp:7950
#23 0x00007f9e0058cefe in QWidget::~QWidget (this=0x1526710, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1619
#24 0x00007f9e00932119 in QGroupBox::~QGroupBox (this=0x1526710, __in_chrg=<optimized out>) at widgets/qgroupbox.cpp:216
#25 0x00007f9e00b07724 in QGraphicsProxyWidget::~QGraphicsProxyWidget (this=0x1a597a0, __in_chrg=<optimized out>) at graphicsview/qgraphicsproxywidget.cpp:554
#26 0x00007f9ddc18c879 in sipPlasma_GroupBox::~sipPlasma_GroupBox (this=0x1a597a0, __in_chrg=<optimized out>) at sip/plasma/sipplasmapart2.cpp:21300
#27 0x00007f9e00af48fe in QGraphicsItem::~QGraphicsItem (this=0x15252c0, __in_chrg=<optimized out>) at graphicsview/qgraphicsitem.cpp:1493
#28 0x00007f9e00b432c6 in ~QGraphicsObject (this=0x15252b0, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#29 QGraphicsWidget::~QGraphicsWidget (this=0x15252b0, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#30 0x00007f9dd7a25da9 in sipQGraphicsWidget::~sipQGraphicsWidget (this=0x15252b0, __in_chrg=<optimized out>) at sipQtGuipart6.cpp:30634
#31 0x00007f9dd7a0806e in release_QGraphicsWidget (sipCppV=0x15252b0) at sipQtGuipart6.cpp:34074
#32 0x00007f9ddc5a1a26 in forgetObject (sw=sw@entry=0x7f9dd57ea0e8) at /build/buildd/sip4-4.15.5/siplib/siplib.c:10963
#33 0x00007f9ddc5a2d09 in sipWrapper_dealloc (self=0x7f9dd57ea0e8) at /build/buildd/sip4-4.15.5/siplib/siplib.c:10515
#34 0x00007f9ddd0d2aba in subtype_dealloc.25957 (self=0x7f9dd57ea0e8) at ../Objects/typeobject.c:1030
#35 0x00007f9ddd15da3f in dict_dealloc.19000 (mp=0x7f9dd5f90d70) at ../Objects/dictobject.c:1010
#36 0x00007f9ddc59fb57 in sipSimpleWrapper_clear (self=self@entry=0x7f9ddc535cc8) at /build/buildd/sip4-4.15.5/siplib/siplib.c:10088
#37 0x00007f9ddc5a2c34 in sipWrapper_clear (self=self@entry=0x7f9ddc535cc8) at /build/buildd/sip4-4.15.5/siplib/siplib.c:10474
#38 0x00007f9ddc5a2d11 in sipWrapper_dealloc (self=0x7f9ddc535cc8) at /build/buildd/sip4-4.15.5/siplib/siplib.c:10517
#39 0x00007f9ddd0d2aba in subtype_dealloc.25957 (self=0x7f9ddc535cc8) at ../Objects/typeobject.c:1030
#40 0x00007f9ddd13ae1f in insertdict_by_entry.18913 (mp=mp@entry=0x7f9dd5f90050, key=key@entry=0x7f9ddcca8540, hash=hash@entry=6047398747149091237, ep=<optimized out>, value=value@entry=0x7f9ddd50f2d0 <_Py_NoneStruct>) at ../Objects/dictobject.c:519
#41 0x00007f9ddd12743b in insertdict (value=0x7f9ddd50f2d0 <_Py_NoneStruct>, hash=6047398747149091237, key=0x7f9ddcca8540, mp=0x7f9dd5f90050) at ../Objects/dictobject.c:556
#42 dict_set_item_by_hash_or_entry (ep=0x0, value=0x7f9ddd50f2d0 <_Py_NoneStruct>, hash=6047398747149091237, key=0x7f9ddcca8540, op=0x7f9dd5f90050) at ../Objects/dictobject.c:765
#43 PyDict_SetItem (op=op@entry=0x7f9dd5f90050, key=key@entry=0x7f9ddcca8540, value=value@entry=0x7f9ddd50f2d0 <_Py_NoneStruct>) at ../Objects/dictobject.c:818
#44 0x00007f9ddd09a5d8 in _PyObject_GenericSetAttrWithDict (obj=<optimized out>, name=0x7f9ddcca8540, value=0x7f9ddd50f2d0 <_Py_NoneStruct>, dict=0x7f9dd5f90050) at ../Objects/object.c:1529
#45 0x00007f9ddd106bbf in PyObject_SetAttr (v=v@entry=0x7f9ddc535b98, name=<optimized out>, value=value@entry=0x7f9ddd50f2d0 <_Py_NoneStruct>) at ../Objects/object.c:1252
#46 0x00007f9ddd14a1da in PyEval_EvalFrameEx (f=f@entry=0x7f9dd5823050, throwflag=throwflag@entry=0) at ../Python/ceval.c:2004
#47 0x00007f9ddd14e54d in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=args@entry=0x7f9dd582fce8, argcount=1, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, closure=0x0) at ../Python/ceval.c:3252
#48 0x00007f9ddd1836d0 in function_call (func=0x7f9dd5f68a28, arg=0x7f9dd582fcd0, kw=0x0) at ../Objects/funcobject.c:526
#49 0x00007f9ddd0efd43 in PyObject_Call (func=func@entry=0x7f9dd5f68a28, arg=arg@entry=0x7f9dd582fcd0, kw=kw@entry=0x0) at ../Objects/abstract.c:2529
#50 0x00007f9ddd07b7bd in instancemethod_call.8988 (func=0x7f9dd5f68a28, arg=0x7f9dd582fcd0, kw=0x0) at ../Objects/classobject.c:2602
#51 0x00007f9ddd0efd43 in PyObject_Call (func=func@entry=0x7f9ddcd26b40, arg=arg@entry=0x7f9ddcd7d050, kw=<optimized out>) at ../Objects/abstract.c:2529
#52 0x00007f9ddd168577 in PyEval_CallObjectWithKeywords (func=func@entry=0x7f9ddcd26b40, arg=arg@entry=0x7f9ddcd7d050, kw=kw@entry=0x0) at ../Python/ceval.c:3889
#53 0x00007f9ddc5ad5a4 in sip_api_call_method (isErr=isErr@entry=0x0, method=method@entry=0x7f9ddcd26b40, fmt=fmt@entry=0x7f9ddc5b2830 "") at /build/buildd/sip4-4.15.5/siplib/siplib.c:1908
#54 0x00007f9ddc5ad67d in callPyDtor (self=0x7f9ddc535b98) at /build/buildd/sip4-4.15.5/siplib/siplib.c:5684
#55 sip_api_common_dtor (sipSelf=0x7f9ddc535b98) at /build/buildd/sip4-4.15.5/siplib/siplib.c:5630
#56 0x00007f9ddc1c3956 in sipPlasma_AppletScript::~sipPlasma_AppletScript (this=0x15ed0c0, __in_chrg=<optimized out>) at sip/plasma/sipplasmapart3.cpp:18378
#57 0x00007f9ddc1c3969 in sipPlasma_AppletScript::~sipPlasma_AppletScript (this=0x15ed0c0, __in_chrg=<optimized out>) at sip/plasma/sipplasmapart3.cpp:18379
#58 0x00007f9e020ee988 in Plasma::AppletPrivate::~AppletPrivate (this=0x15bc2c0, __in_chrg=<optimized out>) at ../../plasma/applet.cpp:2702
#59 0x00007f9e020f132a in Plasma::Applet::~Applet (this=0x15a8700, __in_chrg=<optimized out>) at ../../plasma/applet.cpp:231
#60 0x00007f9e02149579 in Plasma::PopupApplet::~PopupApplet (this=0x15a8700, __in_chrg=<optimized out>) at ../../plasma/popupapplet.cpp:75
#61 0x00007f9e028d6361 in PlasmaApp::storeApplet (this=<optimized out>, applet=0x15a8700) at ../../../../../plasma/generic/shells/plasma-windowed/plasmaapp.cpp:239
#62 0x00007f9e011bb87a in QMetaObject::activate (sender=sender@entry=0x15806a0, m=m@entry=0x7f9e02ad8c00 <SingleView::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fffae9b7700) at kernel/qobject.cpp:3539
#63 0x00007f9e028d42a7 in storeApplet (_t1=0x15a8700, this=0x15806a0) at ./singleview.moc:132
#64 SingleView::closeEvent (this=0x15806a0, event=0x7fffae9b7b20) at ../../../../../plasma/generic/shells/plasma-windowed/singleview.cpp:114
#65 0x00007f9e00590116 in QWidget::event (this=this@entry=0x15806a0, event=event@entry=0x7fffae9b7b20) at kernel/qwidget.cpp:8545
#66 0x00007f9e0093204e in QFrame::event (this=this@entry=0x15806a0, e=e@entry=0x7fffae9b7b20) at widgets/qframe.cpp:557
#67 0x00007f9e009ae4ab in QAbstractScrollArea::event (this=0x15806a0, e=0x7fffae9b7b20) at widgets/qabstractscrollarea.cpp:996
#68 0x00007f9e00540e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1372530, receiver=receiver@entry=0x15806a0, e=e@entry=0x7fffae9b7b20) at kernel/qapplication.cpp:4567
#69 0x00007f9e005474a0 in QApplication::notify (this=this@entry=0x1353970, receiver=receiver@entry=0x15806a0, e=e@entry=0x7fffae9b7b20) at kernel/qapplication.cpp:4353
#70 0x00007f9e01bf1cca in KApplication::notify (this=0x1353970, receiver=0x15806a0, event=0x7fffae9b7b20) at ../../kdeui/kernel/kapplication.cpp:311
#71 0x00007f9e011a74dd in QCoreApplication::notifyInternal (this=0x1353970, receiver=receiver@entry=0x15806a0, event=event@entry=0x7fffae9b7b20) at kernel/qcoreapplication.cpp:953
#72 0x00007f9e0058c989 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#73 QWidgetPrivate::close_helper (this=0x158d4d0, mode=mode@entry=QWidgetPrivate::CloseWithSpontaneousEvent) at kernel/qwidget.cpp:7942
#74 0x00007f9e005ab0b2 in translateCloseEvent (this=0x15806a0) at kernel/qapplication_x11.cpp:5828
#75 QApplication::x11ClientMessage (this=<optimized out>, w=0x15806a0, event=<optimized out>, passive_only=<optimized out>) at kernel/qapplication_x11.cpp:3204
#76 0x00007f9e005ba892 in QApplication::x11ProcessEvent (this=0x1353970, event=event@entry=0x7fffae9b7dc0) at kernel/qapplication_x11.cpp:3888
#77 0x00007f9e005e2b32 in x11EventSourceDispatch (s=0x1371ee0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#78 0x00007f9df8602e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#79 0x00007f9df8603048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#80 0x00007f9df86030ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#81 0x00007f9e011d47a1 in QEventDispatcherGlib::processEvents (this=0x1339a30, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#82 0x00007f9e005e2be6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#83 0x00007f9e011a60af in QEventLoop::processEvents (this=this@entry=0x7fffae9b8190, flags=...) at kernel/qeventloop.cpp:149
#84 0x00007f9e011a63a5 in QEventLoop::exec (this=this@entry=0x7fffae9b8190, flags=...) at kernel/qeventloop.cpp:204
#85 0x00007f9e011abb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#86 0x00007f9e0053f37c in QApplication::exec () at kernel/qapplication.cpp:3828
#87 0x00007f9e028d4b1a in kdemain (argc=2, argv=0x7fffae9b83e8) at ../../../../../plasma/generic/shells/plasma-windowed/main.cpp:56
#88 0x00007f9e02529ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=2, argv=0x7fffae9b83e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffae9b83d8) at libc-start.c:287
#89 0x000000000040070e in _start ()

Reported using DrKonqi