Konsole crashes randomly, for example when closing it, closing a sub-window (e.g. the About screen), and I think it has also crashed when minimizing to taskbar. 

Version information:

Konsole 15.08.0
Using:
KDE Frameworks 5.15.0
Qt 5.5.1 (built against 5.5.0)
The xcb windowing system

One backtrace below.

Reproducible: Couldn't Reproduce

Steps to Reproduce:
Difficult to reproduce, occurs randomly.



Application: Konsole (konsole), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb47e761840 (LWP 1549))]

Thread 2 (Thread 0x7fb467c46700 (LWP 1550)):
#0  0x00007fb4750dfcfc in __lll_lock_wait () from /usr/lib/libpthread.so.0
#1  0x00007fb4750d9b35 in pthread_mutex_lock () from /usr/lib/libpthread.so.0
#2  0x00007fb475701cec in ?? () from /usr/lib/libxcb.so.1
#3  0x00007fb475703757 in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#4  0x00007fb469984e89 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#5  0x00007fb47a40c96e in ?? () from /usr/lib/libQt5Core.so.5
#6  0x00007fb4750d74a4 in start_thread () from /usr/lib/libpthread.so.0
#7  0x00007fb47e15e13d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7fb47e761840 (LWP 1549)):
[KCrash Handler]
#5  0x00007fb475702be8 in ?? () from /usr/lib/libxcb.so.1
#6  0x00007fb4757034ac in ?? () from /usr/lib/libxcb.so.1
#7  0x00007fb4757035a1 in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#8  0x00007fb4770fc727 in _XReply () from /usr/lib/libX11.so.6
#9  0x00007fb46b9805cf in XIQueryDevice () from /usr/lib/libXi.so.6
#10 0x00007fb4699abffe in QXcbConnection::handleEnterEvent(xcb_enter_notify_event_t const*) () from /usr/lib/libQt5XcbQpa.so.5
#11 0x00007fb46999cd0f in QXcbWindow::handleEnterNotifyEvent(xcb_enter_notify_event_t const*) () from /usr/lib/libQt5XcbQpa.so.5
#12 0x00007fb469988e8d in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib/libQt5XcbQpa.so.5
#13 0x00007fb469989683 in QXcbConnection::processXcbEvents() () from /usr/lib/libQt5XcbQpa.so.5
#14 0x00007fb47a61cff1 in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5
#15 0x00007fb47b32401c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#16 0x00007fb47b3294f6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#17 0x00007fb47a5ed9ab in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#18 0x00007fb47a5efda6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQt5Core.so.5
#19 0x00007fb47a643f43 in ?? () from /usr/lib/libQt5Core.so.5
#20 0x00007fb4749a3dc7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0x00007fb4749a4020 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0x00007fb4749a40cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0x00007fb47a64434f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#24 0x00007fb47a5eb37a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#25 0x00007fb47a5f333c in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#26 0x00007fb47e43ca46 in kdemain () from /usr/lib/libkdeinit5_konsole.so
#27 0x00007fb47e095610 in __libc_start_main () from /usr/lib/libc.so.6
#28 0x0000000000400779 in _start ()