Application: plasma-desktop (4.11.13)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-4-amd64 x86_64
Distribution: Debian GNU/Linux 8.1 (jessie)

-- Information about the crash:
- What I was doing when the application crashed:
I had three iceweasel open windows. One of them has only a youtube tab, playing at fullscreen. The crash happened exactly after I closed that particular iceweasel window, and move to another workspace using a custom keyboard shortcut.
I dunno if those are related, but I wasn't doing nothing more particular than that.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc8661c8800 (LWP 1193))]

Thread 4 (Thread 0x7fc83a060700 (LWP 1195)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc85ebc6dea in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fc85ebc6e19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fc8593f40a4 in start_thread (arg=0x7fc83a060700) at pthread_create.c:309
#4  0x00007fc865ac004d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fc7a8696700 (LWP 1209)):
#0  0x00007fc858b153f4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fc858ad0dfe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc858ad0ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc86257bd37 in QEventDispatcherGlib::processEvents (this=0x7fc7a00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fc86254b271 in QEventLoop::processEvents (this=this@entry=0x7fc7a8695d80, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc86254b5d5 in QEventLoop::exec (this=this@entry=0x7fc7a8695d80, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc86243fe99 in QThread::exec (this=this@entry=0x2974d50) at thread/qthread.cpp:538
#7  0x00007fc86252bac3 in QInotifyFileSystemWatcherEngine::run (this=0x2974d50) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fc86244270f in QThreadPrivate::start (arg=0x2974d50) at thread/qthread_unix.cpp:349
#9  0x00007fc8593f40a4 in start_thread (arg=0x7fc7a8696700) at pthread_create.c:309
#10 0x00007fc865ac004d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fc7a713a700 (LWP 1219)):
#0  0x00007fc865ab750d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fc858ad0ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc858ad0ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc86257bd37 in QEventDispatcherGlib::processEvents (this=0x7fc7980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fc86254b271 in QEventLoop::processEvents (this=this@entry=0x7fc7a7139d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc86254b5d5 in QEventLoop::exec (this=this@entry=0x7fc7a7139d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fc86243fe99 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007fc7aaf2ebc7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#8  0x00007fc86244270f in QThreadPrivate::start (arg=0x38ee320) at thread/qthread_unix.cpp:349
#9  0x00007fc8593f40a4 in start_thread (arg=0x7fc7a713a700) at pthread_create.c:309
#10 0x00007fc865ac004d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fc8661c8800 (LWP 1193)):
[KCrash Handler]
#6  0x00007fc7922800e7 in meth_Plasma_DataEngine_sources (sipSelf=0x7fc78ba8d478, sipArgs=<optimized out>) at sip/plasma/sipplasmapart5.cpp:12046
#7  0x00007fc7a5098e6c in call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4033
#8  PyEval_EvalFrameEx (f=0x7fc7a4cdf050, throwflag=-1948894248) at ../Python/ceval.c:2679
#9  0x00007fc7a509927d in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4119
#10 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4054
#11 PyEval_EvalFrameEx (f=0x232c5c0, throwflag=-1951404328) at ../Python/ceval.c:2679
#12 0x00007fc7a510c190 in PyEval_EvalCodeEx (co=0x7fc78bfcde30, globals=0x65b0a80, locals=0x6b92940, args=0x7fc78badb1f8, argcount=2, kws=0x7fc7922bc650, kwcount=0, defs=0x7fc7900309a8, defcount=1, closure=0x0) at ../Python/ceval.c:3265
#13 0x00007fc7a5099171 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4129
#14 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4054
#15 PyEval_EvalFrameEx (f=0x7fc7904e7808, throwflag=-1951499616) at ../Python/ceval.c:2679
#16 0x00007fc7a510c190 in PyEval_EvalCodeEx (co=0x7fc78bff21b0, globals=0x65b0a80, locals=0x6b92940, args=0x7fc78ba96d70, argcount=2, kws=0x7fc7922bc650, kwcount=0, defs=0x7fc78bd3a6e8, defcount=1, closure=0x0) at ../Python/ceval.c:3265
#17 0x00007fc7a5099171 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4129
#18 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4054
#19 PyEval_EvalFrameEx (f=0x7fc78bfdf560, throwflag=-1878673816) at ../Python/ceval.c:2679
#20 0x00007fc7a510c190 in PyEval_EvalCodeEx (co=0x7fc78bfdc5b0, globals=0x65b0a80, locals=0x6b92940, locals@entry=0x0, args=0x7fc78b84c458, argcount=2, kws=0x7fc7922bc650, kws@entry=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3265
#21 0x00007fc7a505b32c in function_call.lto_priv.328 (func=0x7fc79004fcf8, arg=0x7fc78b84c440, kw=0x0) at ../Objects/funcobject.c:526
#22 0x00007fc7a5063be3 in PyObject_Call (func=0x7fc79004fcf8, arg=<optimized out>, kw=<optimized out>) at ../Objects/abstract.c:2529
#23 0x00007fc7a50a60e5 in instancemethod_call.lto_priv.243 (func=0x6b92940, arg=0x7fc790515ae0, kw=0x0) at ../Objects/classobject.c:2602
#24 0x00007fc7a5063be3 in PyObject_Call (func=func@entry=0x7fc7a4c88b90, arg=arg@entry=0x7fc790515ae0, kw=<optimized out>) at ../Objects/abstract.c:2529
#25 0x00007fc7a510b6e7 in PyEval_CallObjectWithKeywords (func=func@entry=0x7fc7a4c88b90, arg=arg@entry=0x7fc790515ae0, kw=kw@entry=0x0) at ../Python/ceval.c:3902
#26 0x00007fc7a50ef358 in PyInstance_New (klass=<optimized out>, arg=0x7fc790515ae0, kw=0x0) at ../Objects/classobject.c:581
#27 0x00007fc7a5063be3 in PyObject_Call (func=0x7fc790061050, arg=<optimized out>, kw=<optimized out>) at ../Objects/abstract.c:2529
#28 0x00007fc7a5097442 in do_call (nk=<optimized out>, na=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4251
#29 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4056
#30 PyEval_EvalFrameEx (f=0x7fc790515ae0, throwflag=-1878650800) at ../Python/ceval.c:2679
#31 0x00007fc7a510c190 in PyEval_EvalCodeEx (co=0x7fc78bfd9030, globals=0x65b0a80, locals=0x6b92940, locals@entry=0x0, args=0x7fc78b844548, argcount=2, kws=0x7fc7922bc650, kws@entry=0x7fc7a4cdf068, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3265
#32 0x00007fc7a505b40d in function_call.lto_priv.328 (func=0x7fc79051faa0, arg=0x7fc78b844530, kw=0x7fc78b0f3168) at ../Objects/funcobject.c:526
#33 0x00007fc7a5063be3 in PyObject_Call (func=0x7fc79051faa0, arg=<optimized out>, kw=<optimized out>) at ../Objects/abstract.c:2529
#34 0x00007fc7a5096907 in ext_do_call (nk=<optimized out>, na=<optimized out>, flags=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4346
#35 PyEval_EvalFrameEx (f=0x7fc78b0f3168, throwflag=-1873675616) at ../Python/ceval.c:2718
#36 0x00007fc7a509927d in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4119
#37 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4054
#38 PyEval_EvalFrameEx (f=0x232c5c0, throwflag=-1543123600) at ../Python/ceval.c:2679
#39 0x00007fc7a510c190 in PyEval_EvalCodeEx (co=0x7fc7a40365b0, globals=0x65b0a80, locals=0x6b92940, locals@entry=0x0, args=0x7fc7904ecf08, argcount=2, kws=0x7fc7922bc650, kws@entry=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3265
#40 0x00007fc7a505b32c in function_call.lto_priv.328 (func=0x7fc7a4060230, arg=0x7fc7904ecef0, kw=0x0) at ../Objects/funcobject.c:526
#41 0x00007fc7a5063be3 in PyObject_Call (func=0x7fc7a4060230, arg=<optimized out>, kw=<optimized out>) at ../Objects/abstract.c:2529
#42 0x00007fc7a50a60e5 in instancemethod_call.lto_priv.243 (func=0x6b92940, arg=0x7fc7904ecef0, kw=0x0) at ../Objects/classobject.c:2602
#43 0x00007fc7a5063be3 in PyObject_Call (func=func@entry=0x7fc790566b40, arg=arg@entry=0x7fc7904ecef0, kw=kw@entry=0x0) at ../Objects/abstract.c:2529
#44 0x00007fc7a5063fdf in PyObject_CallFunctionObjArgs (callable=callable@entry=0x7fc790566b40) at ../Objects/abstract.c:2756
#45 0x00007fc79028384b in DBusPyConnection_HandleMessage (conn=conn@entry=0x7fc7a40d0830, msg=msg@entry=0x7fc7a4cb3528, callable=callable@entry=0x7fc790566b40) at ../../_dbus_bindings/conn.c:79
#46 0x00007fc7902842ea in _filter_message (conn=<optimized out>, message=<optimized out>, user_data=0x7fc790566b40) at ../../_dbus_bindings/conn-methods.c:199
#47 0x00007fc858da61d1 in dbus_connection_dispatch () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#48 0x00007fc78bdbb460 in ?? () from /usr/lib/python2.7/dist-packages/dbus/mainloop/qt.so
#49 0x00007fc86256171c in QMetaObject::activate (sender=sender@entry=0x30b0e30, m=m@entry=0x7fc8628b1bc0 <QSocketNotifier::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc8fd6eac0) at kernel/qobject.cpp:3567
#50 0x00007fc8625aea1e in QSocketNotifier::activated (this=this@entry=0x30b0e30, _t1=29) at .moc/release-shared/moc_qsocketnotifier.cpp:102
#51 0x00007fc86256a98b in QSocketNotifier::event (this=0x30b0e30, e=0x7ffc8fd6ed90) at kernel/qsocketnotifier.cpp:316
#52 0x00007fc86189d48c in QApplicationPrivate::notify_helper (this=this@entry=0x2102fa0, receiver=receiver@entry=0x30b0e30, e=e@entry=0x7ffc8fd6ed90) at kernel/qapplication.cpp:4570
#53 0x00007fc8618a3fa8 in QApplication::notify (this=this@entry=0x20ee7f0, receiver=receiver@entry=0x30b0e30, e=e@entry=0x7ffc8fd6ed90) at kernel/qapplication.cpp:4356
#54 0x00007fc8632701aa in KApplication::notify (this=0x20ee7f0, receiver=0x30b0e30, event=0x7ffc8fd6ed90) at ../../kdeui/kernel/kapplication.cpp:311
#55 0x00007fc86254c71d in QCoreApplication::notifyInternal (this=0x20ee7f0, receiver=0x30b0e30, event=event@entry=0x7ffc8fd6ed90) at kernel/qcoreapplication.cpp:955
#56 0x00007fc86257c380 in sendEvent (event=0x7ffc8fd6ed90, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#57 socketNotifierSourceDispatch (source=0x2103200) at kernel/qeventdispatcher_glib.cpp:110
#58 0x00007fc858ad0c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007fc858ad0f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007fc858ad0ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#61 0x00007fc86257bd37 in QEventDispatcherGlib::processEvents (this=0x207ab20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#62 0x00007fc861941f96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#63 0x00007fc86254b271 in QEventLoop::processEvents (this=this@entry=0x7ffc8fd6efe0, flags=...) at kernel/qeventloop.cpp:149
#64 0x00007fc86254b5d5 in QEventLoop::exec (this=this@entry=0x7ffc8fd6efe0, flags=...) at kernel/qeventloop.cpp:204
#65 0x00007fc862551059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#66 0x00007fc86189b92c in QApplication::exec () at kernel/qapplication.cpp:3828
#67 0x00007fc865dc34bd in kdemain (argc=1, argv=0x7ffc8fd6f238) at ../../../../plasma/desktop/shell/main.cpp:126
#68 0x00007fc8659fbb45 in __libc_start_main (main=0x4006f0 <main(int, char**)>, argc=1, argv=0x7ffc8fd6f238, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc8fd6f228) at libc-start.c:287
#69 0x000000000040071e in _start ()

Reported using DrKonqi