Unreal Engine Issues and Bug Tracker (UE-47447)

Description

Compiling a blueprint that is used in a sequence when the blueprint exists on a sublevel will cause a crash if the level sequence is currently open.

Steps to Reproduce

Download the attached project
Open the project
Open Main Map
Open "bpseq" (level sequence)
Click "Edit bpsimple" in the world outliner
Add a print string to the event graph (just something to dirty the blueprint)
Compile

Result: The editor crashes
Expected: Blueprint would compile the changes that were made

Callstack

UE4Editor_MovieScene!FTrackInstancePropertyBindings::GetCurrentValue<bool>() moviescenecommonhelpers.cpp:439 
UE4Editor_MovieSceneTools!FPropertySection::GetPropertyValue<bool>() propertysection.h:75 
UE4Editor_MovieSceneTools!<lambda_2f5ac08e2b107b6119d191a0b9a81745>::operator() boolpropertysection.cpp:22 
UE4Editor_MovieSceneTools!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<<lambda_2f5ac08e2b107b6119d191a0b9a81745> const & __ptr64>() tuple.h:134 
UE4Editor_MovieSceneTools!TBaseFunctorDelegateInstance<TOptional<bool> __cdecl() delegateinstancesimpl.h:1132 
UE4Editor_MovieSceneTools!TBaseDelegate<TOptional<bool> >::Execute() delegatesignatureimpl.inl:537 
UE4Editor_MovieSceneTools!TAttribute<TOptional<bool> >::Get() attribute.h:137 
UE4Editor_MovieSceneTools!SBoolCurveKeyEditor::IsChecked() sboolcurvekeyeditor.cpp:31 
UE4Editor_MovieSceneTools!TBaseSPMethodDelegateInstance<1,SBoolCurveKeyEditor,0,enum ECheckBoxState __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Slate!TAttribute<enum ECheckBoxState>::Get() attribute.h:137 
UE4Editor_Slate!SCheckBox::OnGetCheckImage() scheckbox.cpp:244 
UE4Editor_Slate!TBaseSPMethodDelegateInstance<1,SCheckBox,0,FSlateBrush const * __ptr64 __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Slate!TAttribute<FSlateBrush const * __ptr64>::Get() attribute.h:137 
UE4Editor_Slate!SImage::ComputeDesiredSize() simage.cpp:62 
UE4Editor_SlateCore!SWidget::CacheDesiredSize() swidget.cpp:485 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:473

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Fixed

Component	UE - Anim - Sequencer
Affects Versions	4.15.3
Target Fix	4.17

Fix Commit	3365000
Main Commit	3567077

Created	Jul 19, 2017
Resolved	Jul 19, 2017
Updated	Apr 27, 2018

UE-47447

Crash compiling blueprint referenced by Level Sequence while sequence is open

Crash compiling blueprint referenced by Level Sequence while sequence is open

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