Steps to reproduce:
1. Cause some known Plasma bug.
2. Click on DrKonqi tray icon to start bug reporting process.
3. Click on 'Developer Information' tab.
4. Click 'Install Debug Symbols' button.
5. Press 'Cancel' button inside 'Missing debug symbols' window.

Actual result: DrKonqi crashed.

Reproducible: crashed only once for me.

Backtrace:

Application: drkonqi (drkonqi), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5f928038c0 (LWP 10471))]

Thread 2 (Thread 0x7f5f7f2cc700 (LWP 10472)):
#0  0x00007ffd20fc2b0b in clock_gettime ()
#1  0x00007f5f8ec2a836 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f5f7f2cba30) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f5f8f538251 in qt_clock_gettime (ts=0x7f5f7f2cba30, clock=<optimized out>) at kernel/qelapsedtimer_unix.cpp:111
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  qt_gettime () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f5f8f536a49 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f5f780030d0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f5f8f536fb5 in QTimerInfoList::timerWait (this=0x7f5f780030d0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f5f8f5386be in timerSourcePrepareHelper (timeout=0x7f5f7f2cbb04, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f5f7f2cbb04) at kernel/qeventdispatcher_glib.cpp:165
#9  0x00007f5f8b11791d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f5f8b1182bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f5f8b11849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f5f8f53894b in QEventDispatcherGlib::processEvents (this=0x7f5f780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#13 0x00007f5f8f4e17ca in QEventLoop::exec (this=this@entry=0x7f5f7f2cbcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#14 0x00007f5f8f30acd4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#15 0x00007f5f928c1b75 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#16 0x00007f5f8f30f989 in QThreadPrivate::start (arg=0x7f5f92937da0) at thread/qthread_unix.cpp:368
#17 0x00007f5f8cd976ba in start_thread (arg=0x7f5f7f2cc700) at pthread_create.c:333
#18 0x00007f5f8ec1c3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5f928038c0 (LWP 10471)):
[KCrash Handler]
#6  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data (this=0x100000046) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:140
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:999
#8  QWindow::d_func (this=0x10000003e) at /usr/include/x86_64-linux-gnu/qt5/QtGui/qwindow.h:95
#9  QWindowPrivate::get (window=0x10000003e) at /usr/include/x86_64-linux-gnu/qt5/QtGui/5.9.1/QtGui/private/qwindow_p.h:152
#10 QtWaylandClient::QWaylandWindow::frameCallback (data=0x19600f0, callback=0x198af30, time=<optimized out>) at qwaylandwindow.cpp:527
#11 0x00007f5f82d35e40 in ffi_call_unix64 () at ../src/x86/unix64.S:76
#12 0x00007f5f82d358ab in ffi_call (cif=cif@entry=0x7ffd20f4c150, fn=<optimized out>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffd20f4c220) at ../src/x86/ffi64.c:525
#13 0x00007f5f835cba9e in wl_closure_invoke (closure=closure@entry=0x195f020, flags=flags@entry=1, target=target@entry=0x198af30, opcode=opcode@entry=0, data=0x19600f0) at ../src/connection.c:935
#14 0x00007f5f835c8760 in dispatch_event (display=display@entry=0x14cf670, queue=0x14cf738) at ../src/wayland-client.c:1310
#15 0x00007f5f835c99ac in dispatch_queue (queue=0x14cf738, display=0x14cf670) at ../src/wayland-client.c:1456
#16 wl_display_dispatch_queue_pending (display=0x14cf670, queue=0x14cf738) at ../src/wayland-client.c:1698
#17 0x00007f5f835c99fc in wl_display_dispatch_pending (display=<optimized out>) at ../src/wayland-client.c:1761
#18 0x00007f5f8382d2b2 in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x14cf4f0) at qwaylanddisplay.cpp:190
#19 0x00007f5f8f50fc19 in QMetaObject::activate (sender=sender@entry=0x153c710, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3766
#20 0x00007f5f8f510527 in QMetaObject::activate (sender=sender@entry=0x153c710, m=m@entry=0x7f5f8f79a380 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3628
#21 0x00007f5f8f4dfb13 in QAbstractEventDispatcher::awake (this=this@entry=0x153c710) at .moc/moc_qabstracteventdispatcher.cpp:145
#22 0x00007f5f8f53896e in QEventDispatcherGlib::processEvents (this=0x153c710, flags=...) at kernel/qeventdispatcher_glib.cpp:430
#23 0x00007f5f8f4e17ca in QEventLoop::exec (this=this@entry=0x7ffd20f4c580, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#24 0x00007f5f8f4ea704 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#25 0x000000000041d5e3 in ?? ()
#26 0x00007f5f8eb35830 in __libc_start_main (main=0x41c540, argc=19, argv=0x7ffd20f4c8e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd20f4c8d8) at ../csu/libc-start.c:291
#27 0x000000000041d849 in _start ()