https://bugs.kde.org/show_bug.cgi?id=434344

            Bug ID: 434344
           Summary: Crash in events?
           Product: krita
           Version: git master
          Platform: Mint (Ubuntu based)
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: * Unknown
          Assignee: krita-bugs-n...@kde.org
          Reporter: tamtamy.tym...@gmail.com
  Target Milestone: ---

Created attachment 136632
  --> https://bugs.kde.org/attachment.cgi?id=136632&action=edit
Crash log for all threads

SUMMARY
I was coloring an animation. I've got this weird event bug where my palm
triggers the start of the stroke, then my pen is above the surface but still
paints, and I have to touch the surface and undo. However it happens every now
and then and usually doesn't lead to a crash.

STEPS TO REPRODUCE
:(

OBSERVED RESULT
Crash

EXPECTED RESULT
No crash

SOFTWARE/OS VERSIONS
Krita

 Version: 5.0.0-prealpha (git 4cb4711)
 Languages: pl_PL, pl, pl_PL, pl
 Hidpi: true

Qt

  Version (compiled): 5.11.1
  Version (loaded): 5.11.1

ADDITIONAL INFORMATION
QLayout: Attempting to add QLayout "" to KisShortcutsDialog "", which already
has a layout
Failed to fetch display info: "current platform doesn't support fetching
display information"
Pasted time range KisTimeSpan(0, 4)

Thread 1 "krita" received signal SIGSEGV, Segmentation fault.
0x00007fffad57c1c0 in ?? ()
(gdb) bt
#0  0x00007fffad57c1c0 in  ()
#1  0x00007ffff4722739 in QMetaObject::cast(QObject const*) const () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffff5233770 in QMdiArea::eventFilter(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#3  0x00007ffff471907b in
QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff50d84d8 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5  0x00007ffff50dfae0 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#6  0x00007ffff6ff78a7 in KisApplication::notify(QObject*, QEvent*)
(this=<optimized out>, receiver=0x55555d738260, event=0x7fffad2e73c0) at
/home/tymon/kritadev/krita/libs/ui/KisApplication.cpp:710
#7  0x00007ffff4719499 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffff471c48b in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffff476bb23 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffff0637d5e in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffff0637ff8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007ffff063808c in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007ffff476b143 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fffea76de51 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#15 0x00007ffff471816b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007ffff47202e2 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x0000555555e2a21b in main (argc=<optimized out>, argv=0x7fffffffde28) at
/home/tymon/kritadev/krita/krita/main.cc:663
#18 0x00007ffff3d48b6b in __libc_start_main (main=0x555555e28890 <main>,
argc=1, argv=0x7fffffffde28, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffde18) at ../csu/libc-start.c:308
#19 0x0000555555e2b2da in _start () at
/home/tymon/kritadev/krita/krita/main.cc:468

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