Bug 399314

Summary: Tile manager crash with big brushes. [gdb backtrace]
Product: [Applications] krita Reporter: wolthera <griffinvalley>
Component: Tile managerAssignee: Dmitry Kazakov <dimula73>
Status: RESOLVED FIXED    
Severity: crash CC: halla
Priority: NOR    
Version First Reported In: git master (please specify the git hash!)   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description wolthera 2018-10-02 16:56:15 UTC 
Related to https://bugs.kde.org/show_bug.cgi?id=398170 but slightly different crash.

This one, unlike the previous is caused by using big brushes.

-----------------------------------------------------------------------------

Thread 1637 "Thread (pooled)" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff767fc700 (LWP 15659)]
0x0000555555e94419 in std::__atomic_base<int>::operator-- (this=0x44) at /usr/include/c++/7/bits/atomic_base.h:304
304           { return __atomic_sub_fetch(&_M_i, 1, memory_order_seq_cst); }
(gdb) thread apply all backtrace

Thread 1638 (Thread 0x7fff757fa700 (LWP 15660)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff757f9bf0, expected=0, 
    futex_word=0x7fff6407d690) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff757f9cc0, mutex=0x7fff6407d640, cond=0x7fff6407d668)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff6407d668, mutex=0x7fff6407d640, abstime=0x7fff757f9cc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff757fa700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1637 (Thread 0x7fff767fc700 (LWP 15659)):
#0  0x0000555555e94419 in std::__atomic_base<int>::operator-- (this=0x44) at /usr/include/c++/7/bits/atomic_base.h:304
#1  0x00007ffff1ba06d2 in QAtomicOps<int>::deref<int> (_q_value=...)
    at /usr/include/x86_64-linux-gnu/qt5/QtCore/qatomic_cxx11.h:271
#2  0x00007ffff1ba035a in QBasicAtomicInteger<int>::deref (this=0x44)
    at /usr/include/x86_64-linux-gnu/qt5/QtCore/qbasicatomic.h:115
#3  0x00007ffff1b9fa58 in KisTileData::deref (this=0x0) at /home/wolthera/krita/src/libs/image/tiles3/kis_tile_data.h:80
#4  0x00007ffff1bc0ce2 in KisMementoItem::releaseTileData (this=0x7fff6c026990)
    at /home/wolthera/krita/src/libs/image/tiles3/kis_memento_item.h:206
#5  0x00007ffff1bc025e in KisMementoItem::reset (this=0x7fff6c026990)
    at /home/wolthera/krita/src/libs/image/tiles3/kis_memento_item.h:106
#6  0x00007ffff1bbe02f in KisMementoManager::registerTileChange (this=0x7fff640642b0, tile=0x7fff8c16c600)
    at /home/wolthera/krita/src/libs/image/tiles3/kis_memento_manager.cc:142
#7  0x00007ffff1b9e7f9 in KisTile::init (this=0x7fff8c16c600, col=18, row=20, defaultTileData=0x7fff64077060, 
    mm=0x7fff640642b0) at /home/wolthera/krita/src/libs/image/tiles3/kis_tile.cc:45
#8  0x00007ffff1b9e8ae in KisTile::KisTile (this=0x7fff8c16c600, col=18, row=20, defaultTileData=0x7fff64077060, 
    mm=0x7fff640642b0) at /home/wolthera/krita/src/libs/image/tiles3/kis_tile.cc:51
#9  0x00007ffff1bb3d4f in KisTiledDataManager::bitBltImpl<false> (this=0x7fff6402ce00, srcDM=0x7fffd82b7e60, rect=...)
    at /home/wolthera/krita/src/libs/image/tiles3/kis_tiled_data_manager.cc:477
#10 0x00007ffff1baff03 in KisTiledDataManager::bitBlt (this=0x7fff6402ce00, srcDM=0x7fffd82b7e60, rect=...)
    at /home/wolthera/krita/src/libs/image/tiles3/kis_tiled_data_manager.cc:568
#11 0x00007ffff1e98e94 in KisDataManager::bitBlt (this=0x7fff6402ce00, srcDM=..., rect=...)
---Type <return> to continue, or q <return> to quit---
    at /home/wolthera/krita/src/libs/image/kis_datamanager.h:220
#12 0x00007ffff1ea0766 in KisPaintDevice::Private::KisPaintDeviceStrategy::fastBitBltImpl (this=0x7fff6407c360, 
    srcDataManager=..., rect=...) at /home/wolthera/krita/src/libs/image/kis_paint_device_strategies.h:184
#13 0x00007ffff1e9f919 in KisPaintDevice::Private::KisPaintDeviceStrategy::fastBitBlt (this=0x7fff6407c360, src=..., 
    rect=...) at /home/wolthera/krita/src/libs/image/kis_paint_device_strategies.h:120
#14 0x00007ffff1e96655 in KisPaintDevice::fastBitBlt (this=0x7fff64015970, src=..., rect=...)
    at /home/wolthera/krita/src/libs/image/kis_paint_device.cc:1887
#15 0x00007ffff1befccd in KisPainter::bitBltImpl<false> (this=0x7fff767fb7d0, dstX=1152, dstY=1280, srcDev=..., srcX=1152, 
    srcY=1280, srcWidth=71, srcHeight=128) at /home/wolthera/krita/src/libs/image/kis_painter.cc:629
#16 0x00007ffff1bda703 in KisPainter::bitBlt (this=0x7fff767fb7d0, dstX=1152, dstY=1280, srcDev=..., srcX=1152, srcY=1280, 
    srcWidth=71, srcHeight=128) at /home/wolthera/krita/src/libs/image/kis_painter.cc:773
#17 0x00007ffff1bda804 in KisPainter::bitBlt (this=0x7fff767fb7d0, pos=..., srcDev=..., srcRect=...)
    at /home/wolthera/krita/src/libs/image/kis_painter.cc:779
#18 0x00007ffff1beda2e in copyAreaOptimizedImpl<false> (dstPt=..., src=..., dst=..., srcRect=...)
    at /home/wolthera/krita/src/libs/image/kis_painter.cc:176
#19 0x00007ffff1bd7c84 in KisPainter::copyAreaOptimized (dstPt=..., src=..., dst=..., srcRect=...)
    at /home/wolthera/krita/src/libs/image/kis_painter.cc:187
#20 0x00007ffff1eb9277 in KisPaintLayer::copyOriginalToProjection (this=0x555567c02340, original=..., projection=..., 
    rect=...) at /home/wolthera/krita/src/libs/image/kis_paint_layer.cc:155
#21 0x00007ffff1d96912 in KisLayer::applyMasks (this=0x555567c02340, source=..., destination=..., requestedRect=..., 
    filthyNode=..., lastNode=...) at /home/wolthera/krita/src/libs/image/kis_layer.cc:716
#22 0x00007ffff1d977df in KisLayer::updateProjection (this=0x555567c02340, rect=..., filthyNode=...)
    at /home/wolthera/krita/src/libs/image/kis_layer.cc:805
#23 0x00007ffff1da18db in KisLayerProjectionPlane::recalculate (this=0x55556f24efc0, rect=..., filthyNode=...)
    at /home/wolthera/krita/src/libs/image/kis_layer_projection_plane.cpp:47
#24 0x00007ffff1d28289 in KisAsyncMerger::startMerge (this=0x55556c847568, walker=..., notifyClones=true)
    at /home/wolthera/krita/src/libs/image/kis_async_merger.cpp:256
#25 0x00007ffff1f94cac in KisUpdateJobItem::runMergeJob (this=0x55556c847520)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:118
#26 0x00007ffff1f94aeb in KisUpdateJobItem::run (this=0x55556c847520)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:86
#27 0x00007ffff48d5fd2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
---Type <return> to continue, or q <return> to quit---
#29 0x00007fffed6246db in start_thread (arg=0x7fff767fc700) at pthread_create.c:463
#30 0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1636 (Thread 0x7fff76ffd700 (LWP 15658)):
#0  Vc_1::Common::Storage<float, 8ul, Vc_1::Common::AliasStrategy::VectorBuiltin>::Storage(float __vector(8) const&) (
    x=..., this=0x7fff76ffa040) at /usr/include/Vc/common/storage.h:267
#1  Vc_1::Vector<float, Vc_1::VectorAbi::Avx>::Vector(float __vector(8)) (x=..., this=<optimized out>)
    at /usr/include/Vc/avx/vector.h:142
#2  Vc_1::Detail::operator+<float> (b=..., a=...) at /usr/include/Vc/avx/vector.tcc:104
#3  Vc_1::operator+<float, Vc_1::VectorAbi::Avx, Vc_1::Vector<float, Vc_1::VectorAbi::Avx> > (y=..., x=...)
    at /usr/include/Vc/common/operators.h:248
#4  OverCompositor32<unsigned char, unsigned int, false, true>::compositeVector<false, true, (Vc_1::Implementation)7> (
    oparams=..., opacity=1, mask=0x0, 
    dst=0x7fff6c449e40 "\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377\335\335\335\377"..., 
    src=0x7fff6c251e40 "\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KN\371\266KO\371\266KO\371\266KN\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO\371\266KO"...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:143
#5  KoStreamedMath<(Vc_1::Implementation)7>::genericComposite<false, false, OverCompositor32<unsigned char, unsigned int, false, true>, 4> (params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoStreamedMath.h:321
#6  0x00007ffff09c461e in KoStreamedMath<(Vc_1::Implementation)7>::genericComposite32<false, false, OverCompositor32<unsigned char, unsigned int, false, true> > (params=...)
    at /home/wolthera/krita/src/libs/pigment/compositeops/KoStreamedMath.h:375
#7  0x00007ffff09b04c2 in KoOptimizedCompositeOpOver32<(Vc_1::Implementation)7>::composite<false> (this=0x555557a0f8b0, 
    params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:266
#8  0x00007ffff09afec3 in KoOptimizedCompositeOpOver32<(Vc_1::Implementation)7>::composite (this=0x555557a0f8b0, 
    params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:257
#9  0x00007ffff076713c in KoColorSpace::bitBlt (this=0x55555ae71230, srcSpace=0x55555ae71230, params=..., op=
---Type <return> to continue, or q <return> to quit---
    0x555557a0f8b0, renderingIntent=KoColorConversionTransformation::IntentPerceptual, conversionFlags=...)
    at /home/wolthera/krita/src/libs/pigment/KoColorSpace.cpp:511
#10 0x00007ffff1bf0713 in KisPainter::bitBltImpl<false> (this=0x7fff76ffcb40, dstX=512, dstY=1123, srcDev=..., srcX=512, 
    srcY=1123, srcWidth=512, srcHeight=413) at /home/wolthera/krita/src/libs/image/kis_painter.cc:751
#11 0x00007ffff1bda703 in KisPainter::bitBlt (this=0x7fff76ffcb40, dstX=512, dstY=1123, srcDev=..., srcX=512, srcY=1123, 
    srcWidth=512, srcHeight=413) at /home/wolthera/krita/src/libs/image/kis_painter.cc:773
#12 0x00007ffff1bda804 in KisPainter::bitBlt (this=0x7fff76ffcb40, pos=..., srcDev=..., srcRect=...)
    at /home/wolthera/krita/src/libs/image/kis_painter.cc:779
#13 0x00007ffff1da1f3b in KisLayerProjectionPlane::apply (this=0x55556f24efc0, painter=0x7fff76ffcb40, rect=...)
    at /home/wolthera/krita/src/libs/image/kis_layer_projection_plane.cpp:99
#14 0x00007ffff1d2d820 in KisAsyncMerger::compositeWithProjection (this=0x55556c8528f8, leaf=..., rect=...)
    at /home/wolthera/krita/src/libs/image/kis_async_merger.cpp:355
#15 0x00007ffff1d284ab in KisAsyncMerger::startMerge (this=0x55556c8528f8, walker=..., notifyClones=true)
    at /home/wolthera/krita/src/libs/image/kis_async_merger.cpp:279
#16 0x00007ffff1f94cac in KisUpdateJobItem::runMergeJob (this=0x55556c8528b0)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:118
#17 0x00007ffff1f94aeb in KisUpdateJobItem::run (this=0x55556c8528b0)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:86
#18 0x00007ffff48d5fd2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fffed6246db in start_thread (arg=0x7fff76ffd700) at pthread_create.c:463
#21 0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1635 (Thread 0x7fff911ac700 (LWP 15657)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff911abbf0, expected=0, 
    futex_word=0x7fff6401c674) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff911abcc0, mutex=0x7fff6401c620, cond=0x7fff6401c648)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff6401c648, mutex=0x7fff6401c620, abstime=0x7fff911abcc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff911ac700) at pthread_create.c:463
---Type <return> to continue, or q <return> to quit---
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1634 (Thread 0x7fff919ad700 (LWP 15656)):
#0  0x00007fffbf8b7a00 in KoLcmsColorConversionTransformation::transform (this=0x7fff80019bd0, 
    src=0x7fff6d904e3c "\327\223l\377\326\222k\377\327\223l\377\327\223l\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\327\223l\377\327\223l\377\330\223l\377\330\223l\377\330\223l\377\327\222k\377\327\223l\377\326\222k\377\324\221k\377\320\217i\377\323\220i\377\330\222j\377\330\222j\377\330\223k\377\330\222k\377\330\223k\377\330\223k\377\330\223k\377\330\223k\377\330\222k\377\330\222k\377\330\222j\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\330\223l\377\330\222k\377\330\223l\377\330\223l\377\330\223l\377\330\223k\377\317\211\201\377\314\207\211\377\313\206\213\377\313\206\213\377\313\206\213\377\313\206\213\377\313\206\212\377"..., 
    dst=0x7fff8496d68c "\325\221g\377\324\220f\377\325\221g\377\325\221g\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\325\221g\377\325\221g\377\326\221g\377\326\221g\377\326\221g\377\325\220f\377\325\221g\377\324\220f\377\322\217f\377\316\215d\377\321\216d\377\326\220e\377\326\220e\377\326\221f\377\326\220g\377\326\221f\377\326\221f\377\326\221f\377\326\221f\377\326\220g\377\326\220g\377\326\220e\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\326\221g\377\326\220g\377\326\221g\377\326\221g\377\326\221g\377\326\221f\377\315\206\202\377\312\204\214\377\311\203\217\377\311\203\217\377\311\203\217\377\311\203\217\377\311\203\215\377"..., numPixels=949)
    at /home/wolthera/krita/src/plugins/color/lcms2engine/IccColorSpaceEngine.cpp:82
#1  0x00007ffff07665f4 in KoColorSpace::convertPixelsTo (this=0x55555ae71230, 
    src=0x7fff6d8f7d10 ":$\006\377:$\006\377:$\006\377@*\f\377>(\n\377;%\a\377:$\006\377;%\a\377E/\020\377L6\027\377I3\025\377lV6\377mW7\377\252vO\377\304\201X\377\306\200W\377\313\206]\377\325\214b\377\327\215b\377\330\215b\377\330\217e\377\330\216c\377\331\217d\377\330\216c\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\216c\377\330\215b\377\330\215b\377\330\214a\377\330\215b\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377"..., 
    dst=0x7fff84960560 "<'\004\377<'\004\377<'\004\377A-\t\377?+\a\377<(\005\377<'\004\377<(\005\377F2\f\377M8\022\377J5\021\377kW1\377lX2\377\247tK\377\302~U\377\304}T\377\311\203Z\377\323\211^\377\325\212^\377\326\212^\377\326\214a\377\326\213_\377\327\214`\377\326\213_\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\213_\377\326\212^\377\326\212^\377\326\211^\377\326\212^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377"..., 
    dstColorSpace=0x55556c88a2b0, numPixels=14336, 
    renderingIntent=KoColorConversionTransformation::IntentRelativeColorimetric, conversionFlags=...)
    at /home/wolthera/krita/src/libs/pigment/KoColorSpace.cpp:430
#2  0x00007fffbf67ec7b in KoColorSpaceAbstract<KoBgrU8Traits>::convertPixelsTo (this=0x55555ae71230, 
    src=0x7fff6d8f7d10 ":$\006\377:$\006\377:$\006\377@*\f\377>(\n\377;%\a\377:$\006\377;%\a\377E/\020\377L6\027\377I3\025\377lV6\377mW7\377\252vO\377\304\201X\377\306\200W\377\313\206]\377\325\214b\377\327\215b\377\330\215b\377\330\217e\377\330\21---Type <return> to continue, or q <return> to quit---
6c\377\331\217d\377\330\216c\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\216c\377\330\215b\377\330\215b\377\330\214a\377\330\215b\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\214a\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377\330\215b\377"..., 
    dst=0x7fff84960560 "<'\004\377<'\004\377<'\004\377A-\t\377?+\a\377<(\005\377<'\004\377<(\005\377F2\f\377M8\022\377J5\021\377kW1\377lX2\377\247tK\377\302~U\377\304}T\377\311\203Z\377\323\211^\377\325\212^\377\326\212^\377\326\214a\377\326\213_\377\327\214`\377\326\213_\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\213_\377\326\212^\377\326\212^\377\326\211^\377\326\212^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\211^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377\326\212^\377"..., 
    dstColorSpace=0x55556c88a2b0, numPixels=14336, 
    renderingIntent=KoColorConversionTransformation::IntentRelativeColorimetric, conversionFlags=...)
    at /home/wolthera/krita/src/libs/pigment/KoColorSpaceAbstract.h:191
#3  0x00007ffff71062c2 in KisTextureTileUpdateInfo::convertTo (this=0x7fff78186080, dstCS=0x55556c88a2b0, 
    renderingIntent=KoColorConversionTransformation::IntentRelativeColorimetric, conversionFlags=...)
    at /home/wolthera/krita/src/libs/ui/opengl/kis_texture_tile_update_info.h:237
#4  0x00007ffff71041dd in KisOpenGLUpdateInfoBuilder::buildUpdateInfo (this=0x55556c84d768, rect=..., projection=..., 
    bounds=..., levelOfDetail=0, convertColorSpace=true)
    at /home/wolthera/krita/src/libs/ui/opengl/KisOpenGLUpdateInfoBuilder.cpp:160
#5  0x00007ffff7103810 in KisOpenGLUpdateInfoBuilder::buildUpdateInfo (this=0x55556c84d768, rect=..., srcImage=..., 
    convertColorSpace=true) at /home/wolthera/krita/src/libs/ui/opengl/KisOpenGLUpdateInfoBuilder.cpp:61
#6  0x00007ffff70f878d in KisOpenGLImageTextures::updateCacheImpl (this=0x55556c84d6d0, rect=..., srcImage=..., 
    convertColorSpace=true) at /home/wolthera/krita/src/libs/ui/opengl/kis_opengl_image_textures.cpp:256
#7  0x00007ffff70f8601 in KisOpenGLImageTextures::updateCache (this=0x55556c84d6d0, rect=..., srcImage=...)
    at /home/wolthera/krita/src/libs/ui/opengl/kis_opengl_image_textures.cpp:244

#8  0x00007ffff70efba9 in KisOpenGLCanvas2::startUpdateCanvasProjection (this=0x55556c884b60, rc=..., channelFlags=...)
    at /home/wolthera/krita/src/libs/ui/opengl/kis_opengl_canvas2.cpp:908
#9  0x00007ffff6e61edf in KisCanvas2::startUpdateCanvasProjection (this=0x55556c3eef10, rc=...)
    at /home/wolthera/krita/src/libs/ui/canvas/kis_canvas2.cpp:755
#10 0x00007ffff73e5909 in KisCanvas2::qt_static_metacall (_o=0x55556c3eef10, _c=QMetaObject::InvokeMetaMethod, _id=21, 
    _a=0x7fff919acb90) at /home/wolthera/krita/build/libs/ui/kritaui_autogen/KGLXD3X7AI/moc_kis_canvas2.cpp:226
#11 0x00007ffff4ad9ad5 in QMetaObject::activate(QObject*, int, int, void**) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007ffff1f8db4a in KisImage::sigImageUpdated (this=0x55556c745140, _t1=...)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/moc_kis_image.cpp:660
#13 0x00007ffff1d75753 in KisImage::notifyProjectionUpdated (this=0x55556c745140, rc=...)
---Type <return> to continue, or q <return> to quit---
    at /home/wolthera/krita/src/libs/image/kis_image.cc:1661
#14 0x00007ffff1d526dc in KisUpdateScheduler::continueUpdate (this=0x55556c828f80, rect=...)
    at /home/wolthera/krita/src/libs/image/kis_update_scheduler.cpp:457
#15 0x00007ffff1d333d8 in KisUpdaterContext::continueUpdate (this=0x55556c7ee3d0, rc=...)
    at /home/wolthera/krita/src/libs/image/kis_updater_context.cpp:285
#16 0x00007ffff1f94ce3 in KisUpdateJobItem::runMergeJob (this=0x55556c8372d0)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:121
#17 0x00007ffff1f94aeb in KisUpdateJobItem::run (this=0x55556c8372d0)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:86
#18 0x00007ffff48d5fd2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fffed6246db in start_thread (arg=0x7fff919ad700) at pthread_create.c:463
#21 0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1633 (Thread 0x7fff77fff700 (LWP 15655)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff77ffebf0, expected=0, 
    futex_word=0x7fff64018db0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff77ffecc0, mutex=0x7fff64018d60, cond=0x7fff64018d88)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff64018d88, mutex=0x7fff64018d60, abstime=0x7fff77ffecc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff77fff700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1632 (Thread 0x7fff777fe700 (LWP 15654)):
#0  0x00007ffff09f741d in Vc_1::simd_cast<Vc_1::Vector<float, Vc_1::VectorAbi::Avx> > (x=...)
    at /usr/include/Vc/avx/simd_cast.h:1237
#1  Vc_1::simd_cast<Vc_1::Vector<float, Vc_1::VectorAbi::Avx>, int, 8ul, Vc_1::Vector<int, Vc_1::VectorAbi::Avx>>(Vc_1::SimdArray<int, 8ul, Vc_1::Vector<int, Vc_1::VectorAbi::Avx>, 8ul> const&) (x0=...) at /usr/include/Vc/common/simdarray.h:2183
#2  KoStreamedMath<(Vc_1::Implementation)7>::fetch_alpha_32<true> (
    data=0x7fff696072e0 "\343\324\274\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\34---Type <return> to continue, or q <return> to quit---
3\324\274\377\343\324\274\377\343\324\273\377\344\324\273\377\344\324\273\377\344\324\273\377\343\324\273\377\344\324\273\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\275\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\273\377\343\324\273\377\344\324\273\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377"...)
    at /home/wolthera/krita/src/libs/pigment/compositeops/KoStreamedMath.h:143
#3  0x00007ffff09f3bdb in OverCompositor32<unsigned char, unsigned int, false, true>::compositeVector<false, false, (Vc_1::Implementation)7> (oparams=..., opacity=1, mask=0x0, 
    dst=0x7fff696072e0 "\343\324\274\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\273\377\344\324\273\377\344\324\273\377\344\324\273\377\343\324\273\377\344\324\273\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\275\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\273\377\343\324\273\377\344\324\273\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\274\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\273\377\343\324\274\377\343\324\274\377\343\324\274\377"..., 
    src=0x7fff6c76eb30 "\316\203\214\377\313}\227\377\312|\231\377\312|\231\377\312|\232\377\312|\232\377\314\177\223\377\315\201\220\377\312}\230\377\311{\233\377\311{\234\377\312{\233\377\270\202\211\377\302}\226\377\304{\233\377\305{\233\377\304{\233\377\304{\233\377\304{\233\377\276\177\222\377\262\207\202\377\301}\226\377\303}\230\377\275\177\222\377\267\203\211\377\301}\227\377\303|\232\377\304|\232\377\304|\232\377\303}\227\377\273\201\215\377\302}\225\377\304|\231\377\306z\235\377\305z\234\377\276\177\220\377\315\221i\377\325\222k\377\326\222k\377\326\222k\377\327\222k\377\327\222l\377\327\223l\377\327\222k\377\327\223l\377\327\223l\377\327\223l\377\330\223l\377\330\223l\377\330\223l\377"...)
    at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:103
#4  KoStreamedMath<(Vc_1::Implementation)7>::genericComposite<false, false, OverCompositor32<unsigned char, unsigned int, false, true>, 4> (params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoStreamedMath.h:331
#5  0x00007ffff09c461e in KoStreamedMath<(Vc_1::Implementation)7>::genericComposite32<false, false, OverCompositor32<unsigned char, unsigned int, false, true> > (params=...)
    at /home/wolthera/krita/src/libs/pigment/compositeops/KoStreamedMath.h:375
#6  0x00007ffff09b04c2 in KoOptimizedCompositeOpOver32<(Vc_1::Implementation)7>::composite<false> (this=0x555557a0f8b0, 
    params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:266
#7  0x00007ffff09afec3 in KoOptimizedCompositeOpOver32<(Vc_1::Implementation)7>::composite (this=0x555557a0f8b0, 
    params=...) at /home/wolthera/krita/src/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h:257
#8  0x00007ffff076713c in KoColorSpace::bitBlt (this=0x55555ae71230, srcSpace=0x55555ae71230, params=..., 
    op=0x555557a0f8b0, renderingIntent=KoColorConversionTransformation::IntentPerceptual, conversionFlags=...)
    at /home/wolthera/krita/src/libs/pigment/KoColorSpace.cpp:511
---Type <return> to continue, or q <return> to quit---
#9  0x00007ffff1bf0713 in KisPainter::bitBltImpl<false> (this=0x7fff777fdb40, dstX=896, dstY=1536, srcDev=..., srcX=896, 
    srcY=1536, srcWidth=327, srcHeight=128) at /home/wolthera/krita/src/libs/image/kis_painter.cc:751
#10 0x00007ffff1bda703 in KisPainter::bitBlt (this=0x7fff777fdb40, dstX=896, dstY=1536, srcDev=..., srcX=896, srcY=1536, 
    srcWidth=327, srcHeight=128) at /home/wolthera/krita/src/libs/image/kis_painter.cc:773
#11 0x00007ffff1bda804 in KisPainter::bitBlt (this=0x7fff777fdb40, pos=..., srcDev=..., srcRect=...)
    at /home/wolthera/krita/src/libs/image/kis_painter.cc:779
#12 0x00007ffff1da1f3b in KisLayerProjectionPlane::apply (this=0x55556c689be0, painter=0x7fff777fdb40, rect=...)
    at /home/wolthera/krita/src/libs/image/kis_layer_projection_plane.cpp:99
#13 0x00007ffff1d2d820 in KisAsyncMerger::compositeWithProjection (this=0x55556c8527a8, leaf=..., rect=...)
    at /home/wolthera/krita/src/libs/image/kis_async_merger.cpp:355
#14 0x00007ffff1d284ab in KisAsyncMerger::startMerge (this=0x55556c8527a8, walker=..., notifyClones=true)
    at /home/wolthera/krita/src/libs/image/kis_async_merger.cpp:279
#15 0x00007ffff1f94cac in KisUpdateJobItem::runMergeJob (this=0x55556c852760)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:118
#16 0x00007ffff1f94aeb in KisUpdateJobItem::run (this=0x55556c852760)
    at /home/wolthera/krita/build/libs/image/kritaimage_autogen/EWIEGA46WW/../../../../../src/libs/image/kis_update_job_item.h:86
#17 0x00007ffff48d5fd2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fffed6246db in start_thread (arg=0x7fff777fe700) at pthread_create.c:463
#20 0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1631 (Thread 0x7fff75ffb700 (LWP 15653)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff75ffabf0, expected=0, 
    futex_word=0x55556f523b40) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff75ffacc0, mutex=0x55556f523af0, cond=0x55556f523b18)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f523b18, mutex=0x55556f523af0, abstime=0x7fff75ffacc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff75ffb700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

---Type <return> to continue, or q <return> to quit---
Thread 1622 (Thread 0x7fff5a7fc700 (LWP 15552)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff5a7fbbf0, expected=0, 
    futex_word=0x55556f5656b4) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff5a7fbcc0, mutex=0x55556f565660, cond=0x55556f565688)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f565688, mutex=0x55556f565660, abstime=0x7fff5a7fbcc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff5a7fc700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1621 (Thread 0x7fff5affd700 (LWP 15551)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff5affcbf0, expected=0, 
    futex_word=0x55556f565250) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff5affccc0, mutex=0x55556f565200, cond=0x55556f565228)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f565228, mutex=0x55556f565200, abstime=0x7fff5affccc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff5affd700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1620 (Thread 0x7fff5b7fe700 (LWP 15550)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff5b7fdbf0, expected=0, 
    futex_word=0x55556f564e80) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff5b7fdcc0, mutex=0x55556f564e30, cond=0x55556f564e58)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f564e58, mutex=0x55556f564e30, abstime=0x7fff5b7fdcc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff5b7fe700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
---Type <return> to continue, or q <return> to quit---

Thread 1619 (Thread 0x7fff5bfff700 (LWP 15549)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff5bffebf0, expected=0, 
    futex_word=0x55556f3eb160) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff5bffecc0, mutex=0x55556f3eb110, cond=0x55556f3eb138)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f3eb138, mutex=0x55556f3eb110, abstime=0x7fff5bffecc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff5bfff700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1618 (Thread 0x7fff68efc700 (LWP 15548)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff68efbbf0, expected=0, 
    futex_word=0x55556f3ead90) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff68efbcc0, mutex=0x55556f3ead40, cond=0x55556f3ead68)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f3ead68, mutex=0x55556f3ead40, abstime=0x7fff68efbcc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff68efc700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1617 (Thread 0x7fff6b7fe700 (LWP 15547)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff6b7fdbf0, expected=0, 
    futex_word=0x55556f3ea970) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff6b7fdcc0, mutex=0x55556f3ea920, cond=0x55556f3ea948)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f3ea948, mutex=0x55556f3ea920, abstime=0x7fff6b7fdcc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff6b7fe700) at pthread_create.c:463
---Type <return> to continue, or q <return> to quit---
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1616 (Thread 0x7fff6bfff700 (LWP 15546)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff6bffebf0, expected=0, 
    futex_word=0x55556f3ea694) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff6bffecc0, mutex=0x55556f3ea640, cond=0x55556f3ea668)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f3ea668, mutex=0x55556f3ea640, abstime=0x7fff6bffecc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff6bfff700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1615 (Thread 0x7fff74ff9700 (LWP 15545)):
#0  0x00007fffed62aed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fff74ff8bf0, expected=0, 
    futex_word=0x55556f113444) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff74ff8cc0, mutex=0x55556f1133f0, cond=0x55556f113418)
    at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x55556f113418, mutex=0x55556f1133f0, abstime=0x7fff74ff8cc0) at pthread_cond_wait.c:667
#3  0x00007ffff48df850 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff48d625d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed6246db in start_thread (arg=0x7fff74ff9700) at pthread_create.c:463
#7  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fffa106a700 (LWP 22847)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fff98003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebd28439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4b04a9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48d3b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fffed6246db in start_thread (arg=0x7fffa106a700) at pthread_create.c:463
#8  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fffa187b700 (LWP 22842)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fff94005440, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebd28439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4b04a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48d3b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffd65a7906 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffed6246db in start_thread (arg=0x7fffa187b700) at pthread_create.c:463
#9  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fffaffff700 (LWP 22837)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fff9c004ee0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebd28439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4b04a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48d3b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffd612c8b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffed6246db in start_thread (arg=0x7fffaffff700) at pthread_create.c:463
#9  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fffaf7fe700 (LWP 22804)):
#0  0x00007ffff3f819d0 in __GI___nanosleep (requested_time=0x7fffaf7fdd70, remaining=0x7fffaf7fdd70)
    at ../sysdeps/unix/sysv/linux/nanosleep.c:28
---Type <return> to continue, or q <return> to quit---
#1  0x00007ffff4b043fd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffff1bd2cef in KisTileDataSwapper::run (
    this=0x7ffff23424a0 <(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>)
    at /home/wolthera/krita/src/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:97
#3  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fffed6246db in start_thread (arg=0x7fffaf7fe700) at pthread_create.c:463
#5  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fffb6932700 (LWP 22798)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fffb0004ae0, nfds=1, timeout=9992) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebd28439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4b04a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48d3b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fffed6246db in start_thread (arg=0x7fffb6932700) at pthread_create.c:463
#8  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fffcf2c4700 (LWP 22570)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fffc801a7f0, nfds=4, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebd28439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4b04a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff48d3b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fffed851e45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffed6246db in start_thread (arg=0x7fffcf2c4700) at pthread_create.c:463
#9  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

---Type <return> to continue, or q <return> to quit---
Thread 2 (Thread 0x7fffdd55e700 (LWP 22565)):
#0  0x00007ffff3fb1bf9 in __GI___poll (fds=0x7fffdd55dc68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff25a2747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007ffff25a436a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fffdfecb129 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007ffff48deaab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fffed6246db in start_thread (arg=0x7fffdd55e700) at pthread_create.c:463
#6  0x00007ffff3fbe88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ffff7f96840 (LWP 22412)):
#0  0x00007ffff3fb35d7 in ioctl () at ../sysdeps/unix/syscall-template.S:78
#1  0x00007fffd1ed2368 in drmIoctl () from /usr/lib/x86_64-linux-gnu/libdrm.so.2
#2  0x00007fffd173fe43 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#3  0x00007fffd17639c8 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fffd1763c4f in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fffd17648a5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#6  0x00007fffd17565c4 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#7  0x00007fffd14b1600 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#8  0x00007ffff70eb39c in Sync::getSync () at /home/wolthera/krita/src/libs/ui/opengl/kis_opengl_canvas2_p.h:96
#9  0x00007ffff70ec873 in KisOpenGLCanvas2::paintGL (this=0x55556c884b60)
    at /home/wolthera/krita/src/libs/ui/opengl/kis_opengl_canvas2.cpp:372
#10 0x00007ffff589747d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007ffff5876b08 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007ffff5837e8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007ffff583f45f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffff72dc811 in KisApplication::notify (this=0x7fffffffe100, receiver=0x55556c884b60, event=0x7fffffffd510)
    at /home/wolthera/krita/src/libs/ui/KisApplication.cpp:610
#15 0x00007ffff4aaaab8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007ffff586f64a in QWidgetPrivate::sendPaintEvent(QRegion const&) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007ffff5846a84 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007ffff5847425 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007ffff585eb6f in QWidgetPrivate::syncBackingStore() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
---Type <return> to continue, or q <return> to quit---
#20 0x00007ffff5876c78 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007ffff597e8d0 in QMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007ffff64bd418 in KMainWindow::event (this=0x5555642b4ba0, ev=0x55556f5e9570)
    at /home/wolthera/krita/src/libs/widgetutils/xmlgui/kmainwindow.cpp:784
#23 0x00007ffff64f61cd in KXmlGuiWindow::event (this=0x5555642b4ba0, ev=0x55556f5e9570)
    at /home/wolthera/krita/src/libs/widgetutils/xmlgui/kxmlguiwindow.cpp:125
#24 0x00007ffff5837e8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007ffff583f45f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007ffff72dc811 in KisApplication::notify (this=0x7fffffffe100, receiver=0x5555642b4ba0, event=0x55556f5e9570)
    at /home/wolthera/krita/src/libs/ui/KisApplication.cpp:610
#27 0x00007ffff4aaaab8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007ffff4aad5fd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007ffff4b05453 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fffebd28287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fffebd284c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fffebd2854c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007ffff4b04a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fffdff55ed1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#35 0x00007ffff4aa8dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007ffff4ab1fa0 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x0000555555e91587 in main (argc=1, argv=0x7fffffffe268) at /home/wolthera/krita/src/krita/main.cc:435
Comment 1 wolthera 2019-03-28 19:23:55 UTC 
I haven't been able to reproduce this since the tile manager fixes, so it might in fact be gone. If it returns I'll reopen.