Application: kwin_x11 (5.3.2)

Qt Version: 5.4.2
Operating System: Linux 4.1.0-1-amd64 x86_64
Distribution: Debian GNU/Linux testing (stretch)

-- Information about the crash:
- Unusual behavior I noticed:
It crashes when I start the KDE, and the plasma desktop is NOT shown.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f6969ebcd90 in vtable for Breeze::Decoration () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#7  0x00007f6986974da9 in QMetaObject::cast (this=0x7f6969ebdb60 <Breeze::Decoration::staticMetaObject>, obj=0x7ffe14599bf8) at kernel/qmetaobject.cpp:331
#8  0x00007f6969c8dbb1 in qobject_cast<Breeze::Decoration*> (object=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject.h:520
#9  Breeze::Button::create (type=341416908, decoration=<optimized out>, parent=0x7ffe14599bf0) at ../../kdecoration/breezebutton.cpp:68
#10 0x00007f6985128917 in KDecoration2::DecorationButtonGroup::DecorationButtonGroup(KDecoration2::DecorationButtonGroup::Position, KDecoration2::Decoration*, std::function<KDecoration2::DecorationButton* (KDecoration2::DecorationButtonType, KDecoration2::Decoration*, QObject*)>) () from /usr/lib/x86_64-linux-gnu/libkdecorations2.so.5
#11 0x00007f6969c94ba0 in Breeze::Decoration::createButtons (this=this@entry=0x1c39660) at ../../kdecoration/breezedecoration.cpp:344
#12 0x00007f6969c9640a in Breeze::Decoration::init (this=0x1c39660) at ../../kdecoration/breezedecoration.cpp:192
#13 0x00007f6987fde0b1 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#14 0x00007f6987ec70e9 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#15 0x00007f6987ec74fb in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#16 0x00007f6987f12482 in ?? () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#17 0x00007f6987eb161d in KWin::Workspace::createClient(unsigned int, bool) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#18 0x00007f6987eb5171 in KWin::Workspace::init() () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#19 0x00007f6987eb5bcf in KWin::Workspace::Workspace(bool) () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#20 0x00007f6987eeb6ae in KWin::Application::createWorkspace() () from /usr/lib/x86_64-linux-gnu/libkwin.so.5
#21 0x00007f698866be39 in ?? () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#22 0x00007f698699daba in call (a=0x7ffe1459a810, r=0x1b2c920, this=0x1b2dd00) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#23 QMetaObject::activate (sender=0x1b2c920, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3702
#24 0x00007f69877cc02b in KSelectionOwner::Private::claimSucceeded() () from /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#25 0x00007f69877cc7b1 in KSelectionOwner::filterEvent(void*) () from /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5
#26 0x00007f6986969c90 in QAbstractEventDispatcher::filterNativeEvent (this=this@entry=0x1b0c3d0, eventType=..., message=message@entry=0x7f696c001550, result=result@entry=0x7ffe1459a9a8) at kernel/qabstracteventdispatcher.cpp:460
#27 0x00007f69720cca3d in QXcbConnection::handleXcbEvent (this=this@entry=0x1ad6d00, event=event@entry=0x7f696c001550) at qxcbconnection.cpp:863
#28 0x00007f69720cdecb in QXcbConnection::processXcbEvents (this=0x1ad6d00) at qxcbconnection.cpp:1303
#29 0x00007f698699ee8a in QObject::event (this=0x1ad6d00, e=<optimized out>) at kernel/qobject.cpp:1245
#30 0x00007f698725aadc in QApplicationPrivate::notify_helper (this=this@entry=0x1ad05c0, receiver=receiver@entry=0x1ad6d00, e=e@entry=0x7f696c0025c0) at kernel/qapplication.cpp:3720
#31 0x00007f698725ffb0 in QApplication::notify (this=0x7ffe1459b090, receiver=0x1ad6d00, e=0x7f696c0025c0) at kernel/qapplication.cpp:3503
#32 0x00007f698696d3ab in QCoreApplication::notifyInternal (this=0x7ffe1459b090, receiver=0x1ad6d00, event=event@entry=0x7f696c0025c0) at kernel/qcoreapplication.cpp:935
#33 0x00007f698696f41b in sendEvent (event=0x7f696c0025c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#34 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1ac0f20) at kernel/qcoreapplication.cpp:1552
#35 0x00007f69869c3802 in QEventDispatcherUNIX::processEvents (this=0x1b0c3d0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:579
#36 0x00007f69721246dd in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#37 0x00007f698696ab62 in QEventLoop::exec (this=this@entry=0x7ffe1459afb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#38 0x00007f69869727ac in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#39 0x00007f698866d320 in kdemain () from /usr/lib/x86_64-linux-gnu/libkdeinit5_kwin_x11.so
#40 0x00007f69882e0b45 in __libc_start_main (main=0x4007a0 <main>, argc=3, argv=0x7ffe1459b1f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe1459b1e8) at libc-start.c:287
#41 0x00000000004007ce in _start ()

Reported using DrKonqi