kwin_x11 creashed but then drconqi crashed too:

Application: drkonqi (drkonqi), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffabe89b8c0 (LWP 23635))]

Thread 4 (Thread 0x7ffa98300700 (LWP 23646)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffa9c0754d3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r300_dri.so
#2  0x00007ffa9c074c17 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r300_dri.so
#3  0x00007ffab8e7170a in start_thread (arg=0x7ffa98300700) at pthread_create.c:333
#4  0x00007ffabacce0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7ffaa544a700 (LWP 23637)):
#0  0x00007ffabacc20bd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffab84eb9d6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffab84ebaec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffabb5f04ab in QEventDispatcherGlib::processEvents (this=0x7ffaa00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007ffabb5980fa in QEventLoop::exec (this=this@entry=0x7ffaa5449cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007ffabb3bdd43 in QThread::exec (this=this@entry=0x7ffabe9ced60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#6  0x00007ffabe95a575 in QDBusConnectionManager::run (this=0x7ffabe9ced60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:171
#7  0x00007ffabb3c2c68 in QThreadPrivate::start (arg=0x7ffabe9ced60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#8  0x00007ffab8e7170a in start_thread (arg=0x7ffaa544a700) at pthread_create.c:333
#9  0x00007ffabacce0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7ffaacf39700 (LWP 23636)):
#0  0x00007ffabacc20bd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007ffab668bc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007ffab668d8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007ffaaf490299 in QXcbEventReader::run (this=0x56478bf49c70) at qxcbconnection.cpp:1325
#4  0x00007ffabb3c2c68 in QThreadPrivate::start (arg=0x56478bf49c70) at thread/qthread_unix.cpp:341
#5  0x00007ffab8e7170a in start_thread (arg=0x7ffaacf39700) at pthread_create.c:333
#6  0x00007ffabacce0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7ffabe89b8c0 (LWP 23635)):
[KCrash Handler]
#6  0x000056478acaab12 in ?? ()
#7  0x00007ffabba41978 in QSyntaxHighlighterPrivate::reformatBlock (this=this@entry=0x56478d0fdc70, block=...) at text/qsyntaxhighlighter.cpp:195
#8  0x00007ffabba41bde in QSyntaxHighlighterPrivate::reformatBlocks (this=0x56478d0fdc70, from=<optimized out>, charsRemoved=<optimized out>, charsAdded=<optimized out>) at text/qsyntaxhighlighter.cpp:176
#9  0x00007ffabb5c7b49 in QMetaObject::activate (sender=sender@entry=0x56478c0bdbc0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcdca5db20) at kernel/qobject.cpp:3730
#10 0x00007ffabb5c80f7 in QMetaObject::activate (sender=sender@entry=0x56478c0bdbc0, m=m@entry=0x7ffabbd6aee0 <QTextDocument::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcdca5db20) at kernel/qobject.cpp:3595
#11 0x00007ffabbc9773a in QTextDocument::contentsChange (this=this@entry=0x56478c0bdbc0, _t1=<optimized out>, _t2=<optimized out>, _t3=<optimized out>) at .moc/moc_qtextdocument.cpp:382
#12 0x00007ffabb9ff41e in QTextDocumentPrivate::finishEdit (this=0x56478c0bdbe0) at text/qtextdocument_p.cpp:1209
#13 0x00007ffabb9ff663 in QTextDocumentPrivate::endEditBlock (this=<optimized out>) at text/qtextdocument_p.cpp:1193
#14 0x00007ffabb9ff6be in QTextDocumentPrivate::endEditBlock (this=<optimized out>) at text/qtextdocument_p.cpp:1179
#15 0x00007ffabba2b9fa in QTextCursor::endEditBlock (this=this@entry=0x7ffcdca5dc00) at text/qtextcursor.cpp:2504
#16 0x00007ffabc0b42fe in QWidgetTextControlPrivate::append (this=0x56478c0bda60, text=..., format=format@entry=Qt::AutoText) at widgets/qwidgettextcontrol.cpp:3100
#17 0x00007ffabc0b438e in QWidgetTextControl::append (this=<optimized out>, text=...) at widgets/qwidgettextcontrol.cpp:3106
#18 0x00007ffabc091b59 in QTextEdit::append (this=<optimized out>, text=...) at widgets/qtextedit.cpp:2568
#19 0x000056478ac98b2d in ?? ()
#20 0x00007ffabb5c7bec in QtPrivate::QSlotObjectBase::call (a=0x7ffcdca5ddf0, r=0x56478c0c8610, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#21 QMetaObject::activate (sender=0x56478bfdc030, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3715
#22 0x000056478ace5e75 in ?? ()
#23 0x000056478ac9ce52 in ?? ()
#24 0x00007ffabb5c7bec in QtPrivate::QSlotObjectBase::call (a=0x7ffcdca5df20, r=0x56478bfdc030, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#25 QMetaObject::activate (sender=sender@entry=0x56478d0d6fb0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3715
#26 0x00007ffabb5c80f7 in QMetaObject::activate (sender=sender@entry=0x56478d0d6fb0, m=m@entry=0x7ffabb7e2200 <QProcess::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3595
#27 0x00007ffabb4ca723 in QProcess::readyReadStandardOutput (this=this@entry=0x56478d0d6fb0) at .moc/moc_qprocess.cpp:359
#28 0x00007ffabb4cbf9e in QProcessPrivate::tryReadFromChannel (this=0x56478d115a20, channel=0x56478d115b50) at io/qprocess.cpp:1027
#29 0x00007ffabb4cddc8 in QProcessPrivate::_q_canReadStandardOutput (this=<optimized out>) at io/qprocess.cpp:1038
#30 QProcess::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7ffcdca5e120) at .moc/moc_qprocess.cpp:205
#31 0x00007ffabb5c7b49 in QMetaObject::activate (sender=sender@entry=0x56478c6143e0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcdca5e120) at kernel/qobject.cpp:3730
#32 0x00007ffabb5c80f7 in QMetaObject::activate (sender=sender@entry=0x56478c6143e0, m=m@entry=0x7ffabb7e66c0 <QSocketNotifier::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcdca5e120) at kernel/qobject.cpp:3595
#33 0x00007ffabb6442fe in QSocketNotifier::activated (this=this@entry=0x56478c6143e0, _t1=<optimized out>) at .moc/moc_qsocketnotifier.cpp:135
#34 0x00007ffabb5d3d12 in QSocketNotifier::event (this=0x56478c6143e0, e=0x7ffcdca5e3a0) at kernel/qsocketnotifier.cpp:260
#35 0x00007ffabbed58ac in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x56478c6143e0, e=0x7ffcdca5e3a0) at kernel/qapplication.cpp:3804
#36 0x00007ffabbedad4f in QApplication::notify (this=0x7ffcdca5e7a0, receiver=0x56478c6143e0, e=0x7ffcdca5e3a0) at kernel/qapplication.cpp:3561
#37 0x00007ffabb59a3b0 in QCoreApplication::notifyInternal2 (receiver=0x56478c6143e0, event=event@entry=0x7ffcdca5e3a0) at kernel/qcoreapplication.cpp:1015
#38 0x00007ffabb5f093d in QCoreApplication::sendEvent (event=0x7ffcdca5e3a0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#39 socketNotifierSourceDispatch (source=0x56478bf83d50) at kernel/qeventdispatcher_glib.cpp:100
#40 0x00007ffab84eb7d7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007ffab84eba40 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007ffab84ebaec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007ffabb5f048f in QEventDispatcherGlib::processEvents (this=0x56478bf87770, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#44 0x00007ffabb5980fa in QEventLoop::exec (this=this@entry=0x7ffcdca5e5c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#45 0x00007ffabb5a090c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#46 0x000056478ac90e1f in ?? ()
#47 0x00007ffababe63f1 in __libc_start_main (main=0x56478ac8fed0, argc=21, argv=0x7ffcdca5e908, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcdca5e8f8) at ../csu/libc-start.c:291
#48 0x000056478ac90ffa in _start ()