Application: kwin_x11 (5.9.5)

Qt Version: 5.8.0
Frameworks Version: 5.34.0
Operating System: Linux 4.11.3-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Clicked on menu icon, went to games, clicked minecraft, after launcher loaded clicked play then the error popped up

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f35544bf840 (LWP 661))]

Thread 6 (Thread 0x7f351ce96700 (LWP 918)):
#0  0x00007f3553ee9396 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3551551511 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f3551552bfe in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f35514fd3aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f355131544a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f354be2d085 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f3551319e9c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f354d106297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f3553ef325f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f3517fff700 (LWP 805)):
#0  0x00007f354d10c39d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f3550483234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f3550483279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f354d106297 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f3553ef325f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f3532101700 (LWP 790)):
#0  0x00007f3553ee9396 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3551551511 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f3551552bfe in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f35514fd3aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f355131544a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f354be2d085 in  () at /usr/lib/libQt5Qml.so.5
#6  0x00007f3551319e9c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f354d106297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f3553ef325f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3538aa2700 (LWP 704)):
#0  0x00007f3553ee9396 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f3551551511 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f3551552bfe in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f35514fd3aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f355131544a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f354afd7c45 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f3551319e9c in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f354d106297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f3553ef325f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f353abf2700 (LWP 673)):
#0  0x00007f3553ef4164 in recvmsg () at /usr/lib/libc.so.6
#1  0x00007f3553003ba7 in  () at /usr/lib/libxcb.so.1
#2  0x00007f3553001bdc in  () at /usr/lib/libxcb.so.1
#3  0x00007f3553003679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#4  0x00007f353bcce1d9 in  () at /usr/lib/libQt5XcbQpa.so.5
#5  0x00007f3551319e9c in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f354d106297 in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f3553ef325f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f35544bf840 (LWP 661)):
[KCrash Handler]
#6  0x0000000002b911b0 in  ()
#7  0x00007f3551531f70 in QObject::connect(QObject const*, char const*, QObject const*, char const*, Qt::ConnectionType) () at /usr/lib/libQt5Core.so.5
#8  0x00007f35504c576f in  () at /usr/lib/libQt5Script.so.5
#9  0x00007f35504c5844 in  () at /usr/lib/libQt5Script.so.5
#10 0x00007f35504c5ac2 in QScriptEngine::newQObject(QObject*, QScriptEngine::ValueOwnership, QFlags<QScriptEngine::QObjectWrapOption> const&) () at /usr/lib/libQt5Script.so.5
#11 0x00007f3553adee7c in  () at /usr/lib/libkwin.so.5
#12 0x00007f35504c5d75 in  () at /usr/lib/libQt5Script.so.5
#13 0x00007f35504ee826 in  () at /usr/lib/libQt5Script.so.5
#14 0x00007f35504f6af1 in  () at /usr/lib/libQt5Script.so.5
#15 0x00007f355152c754 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#16 0x00007f3550cd4e08 in KWin::EffectsHandler::desktopPresenceChanged(KWin::EffectWindow*, int, int) () at /usr/lib/libkwineffects.so.10
#17 0x00007f3550cd67c1 in  () at /usr/lib/libkwineffects.so.10
#18 0x00007f355152d332 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#19 0x00007f3552209d7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#20 0x00007f3552211494 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#21 0x00007f35514fed38 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#22 0x00007f3551500efd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#23 0x00007f3551552a14 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#24 0x00007f353bd308cd in  () at /usr/lib/libQt5XcbQpa.so.5
#25 0x00007f35514fd3aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007f3551505744 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#27 0x00007f35541b4391 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#28 0x00007f3553e2643a in __libc_start_main () at /usr/lib/libc.so.6
#29 0x000000000040069a in _start ()

Reported using DrKonqi