https://bugs.kde.org/show_bug.cgi?id=473760
--- Comment #2 from Dmitry Kazakov <dimul...@gmail.com> ---
The problem happens in line 276 in
KisPlaybackEngineQT::throttledDriverCallback(). It seems like `m_d->measure` is
null by the time of the call. The problem is that two lines above Krita
writes(!) into the same location, so, most probably, some recursion happens in
`bool neededRefresh = displayProxy->displayFrame(targetFrame, false)` function
call... :(
269 [1] if (currentFrame != targetFrame) {
0x7ffc752fe3a4 <+ 868> 41 39 c4 cmp %eax,%r12d
0x7ffc752fe3a7 <+ 871> 74 36 je
0x7ffc752fe3df <_ZN19KisPlaybackEngineQT23throttledDriverCallbackEv+927>
C:/Packaging/KritaWS/deps-install/include/QtCore/qscopedpointer.h:
0x7ffc752fe3a9 <+ 873> 48 8b 4e 28 mov
0x28(%rsi),%rcx
0x7ffc752fe3ad <+ 877> 48 8b 11 mov (%rcx),%rdx
0x7ffc752fe3b0 <+ 880> 48 8b 49 08 mov
0x8(%rcx),%rcx
106 [1] return m_dropFrames;
0x7ffc752fe3b4 <+ 884> 0f b6 52 3c movzbl
0x3c(%rdx),%edx
271 [1] m_d->measure->waitingForFrame =
!m_d->driver->dropFrames();
0x7ffc752fe3b8 <+ 888> 80 f2 01 xor $0x1,%dl
0x7ffc752fe3bb <+ 891> 88 51 18 mov
%dl,0x18(%rcx)
273 [1] bool neededRefresh =
displayProxy->displayFrame(targetFrame, false);
0x7ffc752fe3be <+ 894> 48 89 f9 mov %rdi,%rcx
0x7ffc752fe3c1 <+ 897> 89 c2 mov %eax,%edx
0x7ffc752fe3c3 <+ 899> 45 31 c0 xor %r8d,%r8d
0x7ffc752fe3c6 <+ 902> e8 b5 c6 37 00 call
0x7ffc7567aa80 <_ZN20KisFrameDisplayProxy12displayFrameEib>
C:/Packaging/KritaWS/deps-install/include/QtCore/qscopedpointer.h:
0x7ffc752fe3cb <+ 907> 48 8b 4e 28 mov
0x28(%rsi),%rcx
0x7ffc752fe3cf <+ 911> 48 8b 49 08 mov
0x8(%rcx),%rcx
276 [1] m_d->measure->waitingForFrame =
m_d->measure->waitingForFrame && neededRefresh;
0x7ffc752fe3d3 <+ 915> 80 79 18 00 cmpb
$0x0,0x18(%rcx)
0x7ffc752fe3d7 <+ 919> 0f 95 c2 setne %dl
0x7ffc752fe3da <+ 922> 20 c2 and %al,%dl
0x7ffc752fe3dc <+ 924> 88 51 18 mov
%dl,0x18(%rcx)
279 [1] }
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