Unreal Engine Issues and Bug Tracker (UE-50703)

Description

REGRESSION: No, this occurs as far back as 4.16.

Crash occurs when the user changes a variable type from Object Reference to Actor Soft Object Reference.

Steps to Reproduce

Open QAGame in editor.
Open the level blueprint.
Add a variable, and set its type to Object > Object Reference.
Compile.
Set the variable's Default Value to anything.
Compile again.
Change the variable type to Actor > Soft Object Reference.
Compile a third time,

RESULT

Crash.

Callstack

Fatal error: [File:D:\Framework\Engine\Source\Runtime\CoreUObject\Private\Templates\Casts.cpp] [Line: 10] Cast of StaticMesh /Game/Environments/Props/Boxes/Meshes/AmmoCrate_Closed.AmmoCrate_Closed to Actor failed

UE4Editor_CoreUObject!CastLogError() casts.cpp:11 
UE4Editor_PropertyEditor!CastChecked<AActor,UObject>() casts.h:217 
UE4Editor_PropertyEditor!SPropertyEditorAsset::OnGetAssetName() spropertyeditorasset.cpp:631 
UE4Editor_PropertyEditor!TMemberFunctionCaller<SPropertyEditorAsset,FText() delegateinstanceinterface.h:165 
UE4Editor_PropertyEditor!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SPropertyEditorAsset,FText() tuple.h:497 
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<1,SPropertyEditorAsset,0,FText __cdecl() delegateinstancesimpl.h:327 
UE4Editor_Slate!TBaseDelegate<FText>::Execute() delegatesignatureimpl.inl:537 
UE4Editor_Slate!TAttribute<FText>::Get() attribute.h:137 
UE4Editor_Slate!FTextBlockLayout::ComputeDesiredSize() textblocklayout.cpp:48 
UE4Editor_Slate!STextBlock::ComputeDesiredSize() stextblock.cpp:186 
UE4Editor_SlateCore!SWidget::CacheDesiredSize() swidget.cpp:519 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_SlateCore!SWidget::SlatePrepass() swidget.cpp:502 
UE4Editor_PropertyEditor!SListView<TSharedRef<FDetailTreeNode,0> >::GenerateWidgetForItem() slistview.h:1016 
UE4Editor_PropertyEditor!SListView<TSharedRef<FDetailTreeNode,0> >::ReGenerateItems() slistview.h:911 
UE4Editor_Slate!STableViewBase::Tick() stableviewbase.cpp:249 
UE4Editor_PropertyEditor!STreeView<TSharedRef<FDetailTreeNode,0> >::Tick() streeview.h:466 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:873 
UE4Editor_SlateCore!SOverlay::OnPaint() soverlay.cpp:97 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() spanel.cpp:31 
UE4Editor_SlateCore!SPanel::OnPaint() spanel.cpp:12 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SCompoundWidget::OnPaint() scompoundwidget.cpp:35 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() spanel.cpp:31 
UE4Editor_SlateCore!SPanel::OnPaint() spanel.cpp:12 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_Slate!SBox::OnPaint() sbox.cpp:245 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() spanel.cpp:31 
UE4Editor_SlateCore!SPanel::OnPaint() spanel.cpp:12 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SCompoundWidget::OnPaint() scompoundwidget.cpp:35 
UE4Editor_Slate!SBorder::OnPaint() sborder.cpp:85 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() spanel.cpp:31 
UE4Editor_SlateCore!SPanel::OnPaint() spanel.cpp:12 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SCompoundWidget::OnPaint() scompoundwidget.cpp:35 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SCompoundWidget::OnPaint() scompoundwidget.cpp:35 
UE4Editor_Slate!SBorder::OnPaint() sborder.cpp:85 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SOverlay::OnPaint() soverlay.cpp:97 
UE4Editor_SlateCore!SWidget::Paint() swidget.cpp:899 
UE4Editor_SlateCore!SPanel::PaintArrangedChildren() spanel.cpp:31

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	4.16, 4.17.2, 4.18, 4.19
Target Fix	4.18

Fix Commit	3678602
Release Commit	3678602

Created	Oct 3, 2017
Resolved	Oct 3, 2017
Updated	Apr 27, 2018

UE-50703

Crash changing variable type from Object Reference to Actor Soft Object Reference

Crash changing variable type from Object Reference to Actor Soft Object Reference

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