Got a crash when using instant preview on a 16bit float image. I suspect that instant preview was calculating and something went awry with cloning for the autosave. Haven't tried reproducing yet. Backtrace: ASSERT (krita): "!rhs.m_d->projectionUpdatesFilter" in file /home/krita/kde/src/krita/libs/image/kis_image.cc, line 321 Thread 1 "krita" received signal SIGABRT, Aborted. 0x00007ffff4b7e428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 54 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) thread apply backtrace all Invalid thread ID: backtrace all (gdb) thread apply all backtrace Thread 6751 (Thread 0x7fff6fdf9700 (LWP 19291)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x00007ffff5554738 in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff5550467 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007fffeea6170a in start_thread (arg=0x7fff6fdf9700) at pthread_create.c:333 #5 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 6750 (Thread 0x7fff799fe700 (LWP 19290)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x00007ffff5554738 in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff5550467 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff5553c89 in ?? () ---Type <return> to continue, or q <return> to quit--- from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007fffeea6170a in start_thread (arg=0x7fff799fe700) at pthread_create.c:333 #5 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 6749 (Thread 0x7fff705fa700 (LWP 19289)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x00007ffff5554738 in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff5550467 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007fffeea6170a in start_thread (arg=0x7fff705fa700) at pthread_create.c:333 #5 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 6748 (Thread 0x7fff6b83e700 (LWP 19288)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 ---Type <return> to continue, or q <return> to quit--- #1 0x00007ffff5554738 in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff5550467 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007fffeea6170a in start_thread (arg=0x7fff6b83e700) at pthread_create.c:333 #5 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 15 (Thread 0x7fff99386700 (LWP 31628)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007ffff55547eb in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff672aaa2 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #3 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007fffeea6170a in start_thread (arg=0x7fff99386700) at pthread_create.c:333 #5 0x00007ffff4c4f82d in clone () ---Type <return> to continue, or q <return> to quit--- at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 14 (Thread 0x7fff99b87700 (LWP 31627)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007ffff55547eb in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff554e116 in QSemaphore::tryAcquire(int, int) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff2c32033 in KisTileDataSwapper::waitForWork ( this=<optimized out>) at /home/krita/kde/src/krita/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:86 #4 0x00007ffff2c3222a in KisTileDataSwapper::run ( this=0x7ffff30f7920 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at /home/krita/kde/src/krita/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:92 #5 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #6 0x00007fffeea6170a in start_thread (arg=0x7fff99b87700) at pthread_create.c:333 #7 0x00007ffff4c4f82d in clone () ---Type <return> to continue, or q <return> to quit--- at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 13 (Thread 0x7fff9a388700 (LWP 31626)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007ffff55547eb in QWaitCondition::wait(QMutex*, unsigned long) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #2 0x00007ffff554de8b in QSemaphore::acquire(int) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff2c181fe in KisTileDataPooler::waitForWork ( this=0x7ffff30f78e0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder>) at /home/krita/kde/src/krita/libs/image/tiles3/kis_tile_data_pooler.cc:165 #4 0x00007ffff2c189ba in KisTileDataPooler::run ( this=0x7ffff30f78e0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder>) at /home/krita/kde/src/krita/libs/image/tiles3/kis_tile_data_pooler.cc:187 #5 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #6 0x00007fffeea6170a in start_thread (arg=0x7fff9a388700) at pthread_create.c:333 #7 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 ---Type <return> to continue, or q <return> to quit--- Thread 6 (Thread 0x7fffcbfff700 (LWP 31617)): #0 0x00007ffff4c43b5d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fffee13639c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fffee1364ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007ffff57654fc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #4 0x00007ffff5713efa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #5 0x00007ffff554f38c in QThread::exec() () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #6 0x00007fffeec8ccd5 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5DBus.so.5 #7 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #8 0x00007fffeea6170a in start_thread (arg=0x7fffcbfff700) at pthread_create.c:333 #9 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 5 (Thread 0x7fffd8e21700 (LWP 31616)): #0 0x00007ffff4c43b5d in poll () at ../sysdeps/unix/syscall-template.S:84 ---Type <return> to continue, or q <return> to quit--- #1 0x00007fffee13639c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fffee136722 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fffde499916 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #4 0x00007fffee15cbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fffeea6170a in start_thread (arg=0x7fffd8e21700) at pthread_create.c:333 #6 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 4 (Thread 0x7fffd9622700 (LWP 31615)): #0 0x00007ffff4c43b5d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fffee13639c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fffee1364ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fffee1364e9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007fffee15cbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fffeea6170a in start_thread (arg=0x7fffd9622700) at pthread_create.c:333 #6 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 3 (Thread 0x7fffda03d700 (LWP 31614)): ---Type <return> to continue, or q <return> to quit--- #0 0x00007ffff4c43b5d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007fffee13639c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fffee1364ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fffda04528d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so #4 0x00007fffee15cbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fffeea6170a in start_thread (arg=0x7fffda03d700) at pthread_create.c:333 #6 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 2 (Thread 0x7fffe488e700 (LWP 31613)): #0 0x00007ffff4c43b5d in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007ffff3354c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007ffff33568d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007fffe573ddc9 in ?? () from /home/krita/Qt/5.6/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5 #4 0x00007ffff5553c89 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #5 0x00007fffeea6170a in start_thread (arg=0x7fffe488e700) at pthread_create.c:333 ---Type <return> to continue, or q <return> to quit--- #6 0x00007ffff4c4f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 Thread 1 (Thread 0x7ffff7f108c0 (LWP 31609)): #0 0x00007ffff4b7e428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 #1 0x00007ffff4b8002a in __GI_abort () at abort.c:89 #2 0x00007ffff553c5fe in QMessageLogger::fatal(char const*, ...) const () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff0ed798f in kis_assert_common ( assertion=assertion@entry=0x7ffff2e494d0 "!rhs.m_d->projectionUpdatesFilter", file=file@entry=0x7ffff2e493e0 "/home/krita/kde/src/krita/libs/image/kis_image.cc", line=line@entry=321, throwException=throwException@entry=false, isIgnorable=isIgnorable@entry=false) at /home/krita/kde/src/krita/libs/global/kis_assert.cpp:90 #4 0x00007ffff0ed7cfa in kis_assert_recoverable ( assertion=assertion@entry=0x7ffff2e494d0 "!rhs.m_d->projectionUpdatesFilter", file=file@entry=0x7ffff2e493e0 "/home/krita/kde/src/krita/libs/image/kis_image.cc", line=line@entry=321) at /home/krita/kde/src/krita/libs/global/kis_assert.cpp:103 #5 0x00007ffff2d11d7a in KisImage::KisImage (this=<optimized out>, rhs=..., ---Type <return> to continue, or q <return> to quit--- undoStore=<optimized out>, exactCopy=<optimized out>) at /home/krita/kde/src/krita/libs/image/kis_image.cc:321 #6 0x00007ffff2d12216 in KisImage::clone (this=0x1eaf51c0, exactCopy=exactCopy@entry=true) at /home/krita/kde/src/krita/libs/image/kis_image.cc:267 #7 0x00007ffff78cf7e6 in KisDocument::prepareLocksForSaving ( this=this@entry=0x2276f7c0) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:1684 #8 0x00007ffff78d3f03 in KisDocument::saveFile (this=this@entry=0x2276f7c0, filePath=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:636 #9 0x00007ffff78d5043 in KisDocument::save (this=this@entry=0x2276f7c0, exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:615 #10 0x00007ffff78d54c2 in KisDocument::saveAs (this=this@entry=0x2276f7c0, url=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:588 #11 0x00007ffff78d569c in KisDocument::exportDocument ( this=this@entry=0x2276f7c0, _url=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:549 #12 0x00007ffff78d5a3b in KisDocument::slotAutoSave (this=0x2276f7c0) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:848 #13 0x00007ffff573ecef in QMetaObject::activate(QObject*, int, int, void**) () ---Type <return> to continue, or q <return> to quit--- from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #14 0x00007ffff574c068 in QTimer::timerEvent(QTimerEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #15 0x00007ffff574028b in QObject::event(QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #16 0x00007ffff650904c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #17 0x00007ffff650d488 in QApplication::notify(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #18 0x00007ffff78c4fe7 in KisApplication::notify (this=<optimized out>, receiver=0x19e13be0, event=0x7fffffffd140) at /home/krita/kde/src/krita/libs/ui/KisApplication.cpp:537 #19 0x00007ffff5715e80 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #20 0x00007ffff576433e in QTimerInfoList::activateTimers() () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #21 0x00007ffff5764879 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #22 0x00007fffee1361a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007fffee136400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007fffee1364ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 ---Type <return> to continue, or q <return> to quit--- #25 0x00007ffff57654e7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #26 0x00007ffff5713efa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #27 0x00007ffff571bd9d in QCoreApplication::exec() () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #28 0x0000000000404dc4 in main (argc=1, argv=<optimized out>) at /home/krita/kde/src/krita/krita/main.cc:258 (gdb) (gdb)
And, had it again: Thread 1 (Thread 0x7ffff7f108c0 (LWP 19730)): #0 0x00007ffff4b7e428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 #1 0x00007ffff4b8002a in __GI_abort () at abort.c:89 #2 0x00007ffff553c5fe in QMessageLogger::fatal(char const*, ...) const () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff0ed798f in kis_assert_common ( assertion=assertion@entry=0x7ffff2e494d0 "!rhs.m_d->projectionUpdatesFilter", file=file@entry=0x7ffff2e493e0 "/home/krita/kde/src/krita/libs/image/kis_image.cc", line=line@entry=321, throwException=throwException@entry=false, isIgnorable=isIgnorable@entry=false) ---Type <return> to continue, or q <return> to quit--- at /home/krita/kde/src/krita/libs/global/kis_assert.cpp:90 #4 0x00007ffff0ed7cfa in kis_assert_recoverable ( assertion=assertion@entry=0x7ffff2e494d0 "!rhs.m_d->projectionUpdatesFilter", file=file@entry=0x7ffff2e493e0 "/home/krita/kde/src/krita/libs/image/kis_image.cc", line=line@entry=321) at /home/krita/kde/src/krita/libs/global/kis_assert.cpp:103 #5 0x00007ffff2d11d7a in KisImage::KisImage (this=<optimized out>, rhs=..., undoStore=<optimized out>, exactCopy=<optimized out>) at /home/krita/kde/src/krita/libs/image/kis_image.cc:321 #6 0x00007ffff2d12216 in KisImage::clone (this=0xfc68eb0, exactCopy=exactCopy@entry=true) at /home/krita/kde/src/krita/libs/image/kis_image.cc:267 #7 0x00007ffff78cf7e6 in KisDocument::prepareLocksForSaving ( this=this@entry=0xfc386f0) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:1684 #8 0x00007ffff78d3f03 in KisDocument::saveFile (this=this@entry=0xfc386f0, filePath=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:636 #9 0x00007ffff78d5043 in KisDocument::save (this=this@entry=0xfc386f0, exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:615 #10 0x00007ffff78d54c2 in KisDocument::saveAs (this=this@entry=0xfc386f0, ---Type <return> to continue, or q <return> to quit--- url=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:588 #11 0x00007ffff78d569c in KisDocument::exportDocument ( this=this@entry=0xfc386f0, _url=..., exportConfiguration=...) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:549 #12 0x00007ffff78d5a3b in KisDocument::slotAutoSave (this=0xfc386f0) at /home/krita/kde/src/krita/libs/ui/KisDocument.cpp:848 #13 0x00007ffff573ecef in QMetaObject::activate(QObject*, int, int, void**) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #14 0x00007ffff574c068 in QTimer::timerEvent(QTimerEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #15 0x00007ffff574028b in QObject::event(QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #16 0x00007ffff650904c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #17 0x00007ffff650d488 in QApplication::notify(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Widgets.so.5 #18 0x00007ffff78c4fe7 in KisApplication::notify (this=<optimized out>, receiver=0xfc382d0, event=0x7fffffffd140) at /home/krita/kde/src/krita/libs/ui/KisApplication.cpp:537 #19 0x00007ffff5715e80 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #20 0x00007ffff576433e in QTimerInfoList::activateTimers() () ---Type <return> to continue, or q <return> to quit--- from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #21 0x00007ffff5764841 in ?? () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #22 0x00007fffee1361a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007fffee136400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007fffee1364ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #25 0x00007ffff57654e7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #26 0x00007ffff5713efa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #27 0x00007ffff571bd9d in QCoreApplication::exec() () from /home/krita/Qt/5.6/gcc_64/lib/libQt5Core.so.5 #28 0x0000000000404dc4 in main (argc=1, argv=<optimized out>) at /home/krita/kde/src/krita/krita/main.cc:258 It happened when I was zoomed out and using an instant preview enabled brush to draw some big patches.
This may be fixed already. *** This bug has been marked as a duplicate of bug 373953 ***