Application: knotes (4.14.10)
KDE Platform Version: 4.14.18
Qt Version: 4.8.6
Operating System: Linux 4.1.36-44-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed: trying to open Knotes.

- Unusual behavior I noticed:
In KDE desktop when I open a application, screen do not refresh part or hole of the window. Sometimes pressing "Alt" key it refresh.

Thanks very much.

The crash can be reproduced every time.

-- Backtrace:
Application: KNotes (knotes), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f2da16280c7 in raise () at /lib64/libc.so.6
#7  0x00007f2da1629478 in abort () at /lib64/libc.so.6
#8  0x00007f2da1c48b7d in __gnu_cxx::__verbose_terminate_handler() () at /usr/lib64/libstdc++.so.6
#9  0x00007f2da1c46c06 in  () at /usr/lib64/libstdc++.so.6
#10 0x00007f2da1c46c51 in  () at /usr/lib64/libstdc++.so.6
#11 0x00007f2da1c46eb6 in __cxa_rethrow () at /usr/lib64/libstdc++.so.6
#12 0x00007f2da23351f6 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffc0448c8c0, flags=...) at kernel/qeventloop.cpp:218
#13 0x00007f2da233a459 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#14 0x000000000041440d in  ()
#15 0x00007f2da1614b25 in __libc_start_main () at /lib64/libc.so.6
#16 0x0000000000414724 in _start ()

Reported using DrKonqi