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

View Jira Issue

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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