Unreal Engine Issues and Bug Tracker (UE-43447)

Description

Crash at runtime when rotating a retainer box that contains an image

Steps to Reproduce

Open the editor
Create a new widget blueprint
Add a retainer box to the designer tab
Add an image to the retainer box
Rotate the retainer box 180 degrees
Save and compile
Open the level blueprint
Add the widget blueprint to the viewport
Play in editor
Notice that the editor crashes

Expected: The widget would be added to the screen with the image and retainer box rotated 180 degrees
Result: The editor crashes on play

Callstack

UE4Editor_SlateCore!TArray<FHittestGrid::FCell,FDefaultAllocator>::RemoveAtImpl() array.h:1407 
UE4Editor_SlateCore!FHittestGrid::ClearGridForNewFrame() hittestgrid.cpp:262 
UE4Editor_UMG!FWidgetRenderer::DrawWindow() widgetrenderer.cpp:224 
UE4Editor_UMG!SRetainerWidget::OnTickRetainers() sretainerwidget.cpp:321 
UE4Editor_UMG!TBaseRawMethodDelegateInstance<0,SRetainerWidget,void __cdecl() delegateinstancesimpl.h:648 
UE4Editor_Slate!TBaseMulticastDelegate<void,float>::Broadcast() delegatesignatureimpl.inl:937 
UE4Editor_Slate!FSlateApplication::TickApplication() slateapplication.cpp:1561 
UE4Editor_Slate!FSlateApplication::Tick() slateapplication.cpp:1512 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3086 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown>

Community References

RetainerBox crashes if rotated

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Fixed

Component	UE - Editor - UI Systems
Affects Versions	4.15.1

Created	Mar 29, 2017
Resolved	Sep 13, 2017
Updated	Jul 14, 2021