Application: plasma-desktop (4.11.18)
KDE Platform Version: 4.14.7
Qt Version: 4.8.6
Operating System: Linux 3.19.8-100.fc20.x86_64 x86_64
Distribution: "Fedora release 20 (Heisenbug)"

-- Information about the crash:
- Unusual behavior I noticed:

Plasma-desktop uses the whole RAM memory of the computer included swap

- Custom settings of the application:

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f121296e940 (LWP 1530))]

Thread 4 (Thread 0x7f11f7473700 (LWP 1534)):
#0  0x0000003aa7e0bca0 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000037ebb8ef0b in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /lib64/libQtScript.so.4
#2  0x00000037ebb8ef49 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /lib64/libQtScript.so.4
#3  0x0000003aa7e07ee5 in start_thread () from /lib64/libpthread.so.0
#4  0x0000003aa7af4d1d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f1172a33700 (LWP 1536)):
#0  0x0000003aa928a4ca in g_private_get_impl () from /lib64/libglib-2.0.so.0
#1  0x0000003aa928a969 in g_private_get () from /lib64/libglib-2.0.so.0
#2  0x0000003aa926ef00 in g_thread_self () from /lib64/libglib-2.0.so.0
#3  0x0000003aa92496cd in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00000037e25b54ee in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#5  0x00000037e258543f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x00000037e258578d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x00000037e2479edf in QThread::exec() () from /lib64/libQtCore.so.4
#8  0x00000037e2565e93 in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#9  0x00000037e247c71f in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#10 0x0000003aa7e07ee5 in start_thread () from /lib64/libpthread.so.0
#11 0x0000003aa7af4d1d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f1201fb0700 (LWP 1588)):
#0  0x0000003aa7aea8ad in poll () from /lib64/libc.so.6
#1  0x00007f11f7de3774 in ?? () from /usr/lib64/python2.7/lib-dynload/selectmodule.so
#2  0x000000358a0e0bc4 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
#3  0x000000358a0e21dd in PyEval_EvalCodeEx () from /lib64/libpython2.7.so.1.0
#4  0x000000358a06f0d8 in ?? () from /lib64/libpython2.7.so.1.0
#5  0x000000358a04a0d3 in PyObject_Call () from /lib64/libpython2.7.so.1.0
#6  0x000000358a0590c5 in ?? () from /lib64/libpython2.7.so.1.0
#7  0x000000358a04a0d3 in PyObject_Call () from /lib64/libpython2.7.so.1.0
#8  0x000000358a0dc027 in PyEval_CallObjectWithKeywords () from /lib64/libpython2.7.so.1.0
#9  0x00007f11fc422ab8 in sip_api_call_method () from /usr/lib64/python2.7/site-packages/sip.so
#10 0x00007f11fc6ba960 in sipVH_QtCore_11(PyGILState_STATE, void (*)(_sipSimpleWrapper*, PyGILState_STATE), _sipSimpleWrapper*, _object*) () from /usr/lib64/python2.7/site-packages/PyQt4/QtCore.so
#11 0x00007f11fc6f601e in sipQThread::run() () from /usr/lib64/python2.7/site-packages/PyQt4/QtCore.so
#12 0x00000037e247c71f in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#13 0x0000003aa7e07ee5 in start_thread () from /lib64/libpthread.so.0
#14 0x0000003aa7af4d1d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f121296e940 (LWP 1530)):
[KCrash Handler]
#5  0x0000003aa7a35877 in raise () from /lib64/libc.so.6
#6  0x0000003aa7a36f68 in abort () from /lib64/libc.so.6
#7  0x000000358a0fcade in Py_FatalError () from /lib64/libpython2.7.so.1.0
#8  0x000000358a0fb693 in PyGILState_Release () from /lib64/libpython2.7.so.1.0
#9  0x00007f11fc4202b5 in sip_api_parse_result_ex () from /usr/lib64/python2.7/site-packages/sip.so
#10 0x00007f11fc6bab75 in sipVH_QtCore_18(PyGILState_STATE, void (*)(_sipSimpleWrapper*, PyGILState_STATE), _sipSimpleWrapper*, _object*, QObject*, QEvent*) () from /usr/lib64/python2.7/site-packages/PyQt4/QtCore.so
#11 0x00007f11fb6e942b in sipPlasma_AppletScript::eventFilter(QObject*, QEvent*) () from /usr/lib64/python2.7/site-packages/PyKDE4/plasma.so
#12 0x00000037e2586b16 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#13 0x0000003eb07cae4c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#14 0x0000003eb07d17c5 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQtGui.so.4
#15 0x00000036d084a6ea in KApplication::notify(QObject*, QEvent*) () from /lib64/libkdeui.so.5
#16 0x00000037e25869ad in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQtCore.so.4
#17 0x00000037e25b8213 in QTimerInfoList::activateTimers() () from /lib64/libQtCore.so.4
#18 0x00000037e25b52d1 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQtCore.so.4
#19 0x0000003aa92492a6 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#20 0x0000003aa9249628 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#21 0x0000003aa92496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#22 0x00000037e25b54ce in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#23 0x0000003eb086ccd6 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtGui.so.4
#24 0x00000037e258543f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#25 0x00000037e258578d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#26 0x00000037e258ae59 in QCoreApplication::exec() () from /lib64/libQtCore.so.4
#27 0x00000036d8a3d934 in kdemain () from /lib64/libkdeinit4_plasma-desktop.so
#28 0x0000003aa7a21d65 in __libc_start_main () from /lib64/libc.so.6
#29 0x0000000000400941 in _start ()

Reported using DrKonqi