Application: konsole (15.08.0)

Qt Version: 5.5.0
Operating System: Linux 4.1.12-1-pv x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
- Unusual behavior I noticed:
kfontview does not show previews of true type fonts, same behaviour in systemsettings - fonts

The crash can be reproduced sometimes.

-- Backtrace:
Application: Konsole (konsole), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#6  0x00007fa585079187 in raise () at /lib64/libc.so.6
#7  0x00007fa58507a538 in abort () at /lib64/libc.so.6
#8  0x00007fa5850b6804 in  () at /lib64/libc.so.6
#9  0x00007fa5850bc06e in malloc_printerr () at /lib64/libc.so.6
#10 0x00007fa5850bcd86 in _int_free () at /lib64/libc.so.6
#11 0x00007fa5817062fb in QMetaCallEvent::~QMetaCallEvent() () at /usr/lib64/libQt5Core.so.5
#12 0x00007fa581706349 in QMetaCallEvent::~QMetaCallEvent() () at /usr/lib64/libQt5Core.so.5
#13 0x00007fa5816dbae7 in QCoreApplication::removePostedEvents(QObject*, int) () at /usr/lib64/libQt5Core.so.5
#14 0x00007fa5817068d7 in QObjectPrivate::~QObjectPrivate() () at /usr/lib64/libQt5Core.so.5
#15 0x00007fa581706a19 in QObjectPrivate::~QObjectPrivate() () at /usr/lib64/libQt5Core.so.5
#16 0x00007fa581710fb4 in QObject::~QObject() () at /usr/lib64/libQt5Core.so.5
#17 0x00007fa5707d7469 in QXcbConnection::~QXcbConnection() () at /usr/lib64/libQt5XcbQpa.so.5
#18 0x00007fa5707ddeae in QXcbIntegration::~QXcbIntegration() () at /usr/lib64/libQt5XcbQpa.so.5
#19 0x00007fa5707ddfa9 in QXcbIntegration::~QXcbIntegration() () at /usr/lib64/libQt5XcbQpa.so.5
#20 0x00007fa581c27775 in QGuiApplicationPrivate::~QGuiApplicationPrivate() () at /usr/lib64/libQt5Gui.so.5
#21 0x00007fa5823c3479 in QApplicationPrivate::~QApplicationPrivate() () at /usr/lib64/libQt5Widgets.so.5
#22 0x00007fa581710fb4 in QObject::~QObject() () at /usr/lib64/libQt5Core.so.5
#23 0x00007fa5823c4ffc in QApplication::~QApplication() () at /usr/lib64/libQt5Widgets.so.5
#24 0x00007fa58540e25e in kdemain () at /usr/lib64/libkdeinit5_konsole.so
#25 0x00007fa585065b05 in __libc_start_main () at /lib64/libc.so.6
#26 0x00000000004007ee in _start ()

Reported using DrKonqi