Unreal Engine Issues

UE-64278

Editor crashes if Sequencer has keyframes for a variable that has changed

Editor crashes if Sequencer has keyframes for a variable that has changed

Description

The Editor crashes if loaded sequence has keyframes for an actor variable that has been changed, instead of soft erroring out.

This was reported and tested on 4.20.3 (CL-4369336). It was reproduced in 4.19.2 (CL-4033788) and Main 4.21 (CL-4370874)

Steps to Reproduce
  1. Open the UE4 Editor and create a Blank template project
  2. Create an Actor Blueprint and make a Boolean variable
  3. Set the Bool to be 'Exposed to Cinematics'
  4. Add an instance of the Actor to the scene
  5. Create a new Level Sequence
  6. Add the Actor to the Sequence
  7. Create a track based off the Bool and add keyframes to it
  8. In the Actor Blueprint change the variable type of the Bool
  9. Compile the Actor Blueprint

Results: Editor crashes

Expected: Sequencer should report that the keyframes are not valid, raising the error so that they can be deleted or otherwise rectified.

Callstack
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff592e50d8 KERNELBASE.dll!UnknownFunction []
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff3b586850 UE4Editor-ApplicationCore.dll!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowserroroutputdevice.cpp:65]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a5a62fc UE4Editor-Core.dll!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:70]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a5351db UE4Editor-Core.dll!FDebug::AssertFailed() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:425]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff186d80a2 UE4Editor-CoreUObject.dll!CastLogError() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\private\templates\casts.cpp:11]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff00b8af98 UE4Editor-MovieScene.dll!CastChecked<UBoolProperty,UProperty>() [d:\build\++ue4\sync\engine\source\runtime\coreuobject\public\templates\casts.h:217]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff00b92c48 UE4Editor-MovieScene.dll!FTrackInstancePropertyBindings::GetCurrentValue<bool>() [d:\build\++ue4\sync\engine\source\runtime\moviescene\private\moviescenecommonhelpers.cpp:454]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007ffeffff016b UE4Editor-MovieSceneTracks.dll!TMovieSceneExternalValue<bool>::GetValue() [d:\build\++ue4\sync\engine\source\runtime\moviescene\public\channels\moviescenechanneleditordata.h:93]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007ffefffc3c51 UE4Editor-MovieSceneTracks.dll!UE4Function_Private::TFunctionRefCaller<TOptional<bool> (__cdecl*)(UObject & __ptr64,FTrackInstancePropertyBindings * __ptr64),TOptional<bool> __cdecl(UObject & __ptr64,FTrackInstancePropertyBindings * __ptr64)>::Call() [d:\build\++ue4\sync\engine\source\runtime\core\public\templates\function.h:242]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007ffefe28676b UE4Editor-MovieSceneTools.dll!TSequencerKeyEditor<FMovieSceneBoolChannel,bool>::GetExternalValue() [d:\build\++ue4\sync\engine\source\editor\moviescenetools\private\curvekeyeditors\sequencerkeyeditor.h:61]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007ffefe29ae8d UE4Editor-MovieSceneTools.dll!SBoolCurveKeyEditor::IsChecked() [d:\build\++ue4\sync\engine\source\editor\moviescenetools\private\curvekeyeditors\sboolcurvekeyeditor.cpp:25]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007ffefe26de2f UE4Editor-MovieSceneTools.dll!TBaseSPMethodDelegateInstance<1,SBoolCurveKeyEditor,0,enum ECheckBoxState __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:269]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff19162202 UE4Editor-Slate.dll!SCheckBox::OnGetCheckImage() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:241]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff1914023f UE4Editor-Slate.dll!TBaseSPMethodDelegateInstance<1,SCheckBox,0,FSlateBrush const * __ptr64 __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:269]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff19112999 UE4Editor-Slate.dll!SImage::ComputeDesiredSize() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\images\simage.cpp:45]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a05b508 UE4Editor-SlateCore.dll!SWidget::CacheDesiredSize() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:678]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10595d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:544]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:641][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff0a10590d UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [d:\build\++ue4\sync\engine\source\runtime\slatecore\private\widgets\swidget.cpp:536]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18fd26ac UE4Editor-Slate.dll!PrepassWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1437]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18fd286c UE4Editor-Slate.dll!PrepassWindowAndChildren() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1446]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18f9d28b UE4Editor-Slate.dll!FSlateApplication::DrawPrepass() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1485]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18fd30a5 UE4Editor-Slate.dll!FSlateApplication::PrivateDrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1526]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18f9e7cf UE4Editor-Slate.dll!FSlateApplication::DrawWindows() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1285]
[2018.09.19-17.50.18:642][560]LogWindows: Error: [Callstack] 0x00007fff18fff010 UE4Editor-Slate.dll!FSlateApplication::TickApplication() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1860]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007fff18ffdd17 UE4Editor-Slate.dll!FSlateApplication::Tick() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1687]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007ff636b16aa7 UE4Editor.exe!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3574]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007ff636b25b3c UE4Editor.exe!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:166]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007ff636b25bba UE4Editor.exe!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007ff636b33dac UE4Editor.exe!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007ff636b35aaa UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283]
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007fff5aaf1fe4 KERNEL32.DLL!UnknownFunction []
[2018.09.19-17.50.18:643][560]LogWindows: Error: [Callstack] 0x00007fff5c71cb31 ntdll.dll!UnknownFunction []

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Fixed
ComponentUE - Anim - Sequencer
Affects Versions4.19.2, 4.21, 4.20.3
Target Fix4.21
Fix Commit4380344
Main Commit4629913
Release Commit4404468
CreatedSep 19, 2018
ResolvedSep 20, 2018
UpdatedDec 4, 2018