Bug 392422

Summary:	Krita 4 crash while specific shortcuts
Product:	[Applications] krita	Reporter:	Andras <andrasszerencses1>
Component:	General	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	halla, scottpetrovic
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Andras 2018-03-27 19:04:30 UTC

Application: krita (4.0.0)

Qt Version: 5.10.0
Frameworks Version: 5.44.0
Operating System: Linux 4.13.0-37-generic x86_64
Distribution: KDE neon User Edition 5.12

-- Information about the crash:
- What I was doing when the application crashed:
press alt+meta+x
Some other keys crash too. Also Krita closes sometime when I duplicate and modify some brush.

-- Backtrace:
Application: Krita (krita), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f13791e4900 (LWP 21997))]

Thread 4 (Thread 0x7f133a8e2700 (LWP 22608)):
#0  0x00007f1375b7e74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f136dcd638c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f132c003070, timeout=<optimized out>, context=0x7f132c000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  g_main_context_iterate (context=context@entry=0x7f132c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f136dcd649c in g_main_context_iteration (context=0x7f132c000990, may_block=may_block@entry=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f13766c75cb in QEventDispatcherGlib::processEvents (this=0x7f132c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f137666e64a in QEventLoop::exec (this=this@entry=0x7f133a8e1ca0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f137648e554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007f1355ac8a35 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f13764936eb in QThreadPrivate::start (arg=0xce90590) at thread/qthread_unix.cpp:376
#9  0x00007f136f60d6ba in start_thread (arg=0x7f133a8e2700) at pthread_create.c:333
#10 0x00007f1375b8a41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f133a0e1700 (LWP 22575)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f137649467b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0xbfcadd0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=mutex@entry=0xbe1b0d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f137648d1ef in QSemaphore::tryAcquire (this=0xbfcabb0, n=n@entry=1, timeout=timeout@entry=-1) at thread/qsemaphore.cpp:229
#4  0x00007f137371c4b3 in KisTileDataSwapper::waitForWork (this=this@entry=0x7f1373c1ecc0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at /workspace/build/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:86
#5  0x00007f137371c6aa in KisTileDataSwapper::run (this=0x7f1373c1ecc0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at /workspace/build/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:92
#6  0x00007f13764936eb in QThreadPrivate::start (arg=0x7f1373c1ecc0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at thread/qthread_unix.cpp:376
#7  0x00007f136f60d6ba in start_thread (arg=0x7f133a0e1700) at pthread_create.c:333
#8  0x00007f1375b8a41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f1352b1b700 (LWP 22001)):
#0  0x00007f1375b7e74d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f136dcd638c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f134c017cd0, timeout=<optimized out>, context=0x7f134c000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  g_main_context_iterate (context=context@entry=0x7f134c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f136dcd649c in g_main_context_iteration (context=0x7f134c000990, may_block=may_block@entry=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f13766c75cb in QEventDispatcherGlib::processEvents (this=0x7f134c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f137666e64a in QEventLoop::exec (this=this@entry=0x7f1352b1ac90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f137648e554 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007f136f8392c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f13764936eb in QThreadPrivate::start (arg=0x7f136faadd60) at thread/qthread_unix.cpp:376
#9  0x00007f136f60d6ba in start_thread (arg=0x7f1352b1b700) at pthread_create.c:333
#10 0x00007f1375b8a41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f13791e4900 (LWP 21997)):
[KCrash Handler]
#6  0x00007f1376679ff7 in QMetaObject::cast (this=0x7f1377a84820 <QAction::staticMetaObject>, obj=obj@entry=0xd587cb0) at kernel/qmetaobject.cpp:366
#7  0x00007f137667a035 in QMetaObject::cast (this=<optimized out>, obj=obj@entry=0xd587cb0) at kernel/qmetaobject.cpp:355
#8  0x00007f13773d25e2 in qobject_cast<QAction*> (object=0xd587cb0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:514
#9  qWidgetShortcutContextMatcher (object=0xd587cb0, context=Qt::WindowShortcut) at kernel/qshortcut.cpp:113
#10 0x00007f1376c3618a in QShortcutEntry::correctContext (this=0x22c03d50) at kernel/qshortcutmap.cpp:79
#11 QShortcutMap::find (this=this@entry=0x2c17380, e=e@entry=0x7ffd04bb12b0, ignoredModifiers=ignoredModifiers@entry=0) at kernel/qshortcutmap.cpp:469
#12 0x00007f1376c36d0e in QShortcutMap::nextState (this=this@entry=0x2c17380, e=e@entry=0x7ffd04bb12b0) at kernel/qshortcutmap.cpp:380
#13 0x00007f1376c37041 in QShortcutMap::tryShortcut (this=this@entry=0x2c17380, e=e@entry=0x7ffd04bb12b0) at kernel/qshortcutmap.cpp:336
#14 0x00007f1376be8956 in QWindowSystemInterface::handleShortcutEvent (window=<optimized out>, window@entry=0xbba05a0, timestamp=21578233, keyCode=88, modifiers=..., nativeScanCode=53, nativeVirtualKey=120, nativeModifiers=88, text=..., autorepeat=false, count=1) at kernel/qwindowsysteminterface.cpp:405
#15 0x00007f1376c05a94 in QGuiApplicationPrivate::processKeyEvent (e=0x17fe3820) at kernel/qguiapplication.cpp:2064
#16 0x00007f1376c0ae25 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x17fe3820) at kernel/qguiapplication.cpp:1747
#17 0x00007f1376be48fb in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:976
#18 0x00007f135f8d61ab in QPAEventDispatcherGlib::processEvents (this=0x2ce2c40, flags=...) at qeventdispatcher_glib.cpp:70
#19 0x00007f137666e64a in QEventLoop::exec (this=this@entry=0x7ffd04bb1530, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#20 0x00007f1376677854 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1332
#21 0x00007f1376c0083c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1687
#22 0x00007f13773b0a25 in QApplication::exec () at kernel/qapplication.cpp:2917
#23 0x000000000040514f in main (argc=2, argv=<optimized out>) at /workspace/build/krita/main.cc:361

Reported using DrKonqi

Comment 1 Scott Petrovic 2018-03-27 19:20:04 UTC

That shortcut doesn't crash my computer...but I am on Windows right now.

1. Does it crash every time you press "Alt + Meta + x"
2. Did you assign a shortcut to that key combination? Which one if yes.

Your second part about brushes seems like a separate thing, so I would file a separate ticket for that with a description on how to get Krita to crash.

Comment 2 Scott Petrovic 2018-03-27 19:20:50 UTC

marking as 'works for me' until we get some more info on the shortcut crash

Comment 3 Halla Rempt 2018-03-27 19:21:44 UTC

The backtrace doesn't show any code in Krita, which suggests that this is a bug in Qt.

> press alt+meta+x
> Some other keys crash too.

Which ones exactly? My keyboard doesn't have a "meta" key, and alt-esc-x doesn't crash. Is there any interesting output if you start Krita from the terminal and provoke a crash?

> Also Krita closes sometime when I duplicate and modify some brush.

That, of course, is something completely different. Don't mix different issues in one report, please.

Comment 4 Andras 2018-03-31 20:24:11 UTC

Yes, me too suspecting it's a QT or other maybe screen related issue instead. What Meta key? That's the Win key other name on Linux. Anyway, it isn't crash every time I press this combination and there was not and there is no shortcut for them. Ok, after Krita crashed a lot while brush creation and pressing key combination, I thought it worth to create a report with backtrace that it's may useful for further development but now, I'll think 2x. Close this thread, sorry for stealing your time.