Unreal Engine Issues and Bug Tracker (UE-46011)

Description

Ensure condition failed: Lhs.CurrentNum == Lhs.InitialNum [Link Removed] [Line: 197] Array has changed during ranged-for iteration!

Ensure occurs after dragging in multiple cameras into the world in VR mode.

Previously dragging in cameras caused a crash (UE-45574) in 4.16 and 4.16.1.

Steps to Reproduce

Setup:
Have access to QAGame
Have access to a VR headset and controllers

Repro:

Open QAGame
Enable VR Mode
Navigate to the Modes Panel and click on the Cinematic tab
Drag two Cine Camera Actors into the world (if this doesn't cause the ensure then drag in another)

Callstack

UE4Editor_HeadMountedDisplay!IHeadMountedDisplay::ApplyLateUpdate() headmounteddisplaymodule.cpp:88 
UE4Editor_OculusRift!OculusRift::FViewExtension::PreRenderViewFamily_RenderThread() oculusriftrender.cpp:113 
UE4Editor_Renderer!ViewExtensionPreRender_RenderThread() scenerendering.cpp:1782 
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`26'::EURCMacro_FViewExtensionPreDrawCommand>::ExecuteTask() taskgraphinterfaces.h:883 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:954 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:701 
UE4Editor_RenderCore!RenderingThreadMain() renderingthread.cpp:327 
UE4Editor_RenderCore!FRenderingThread::Run() renderingthread.cpp:461 
UE4Editor_Core!FRunnableThreadWin::Run() windowsrunnablethread.cpp:76

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Cannot Reproduce

Component	UE - Editor - Workflow Systems
Affects Versions	4.16.2
Target Fix	4.19

Created	Jun 13, 2017
Resolved	Oct 25, 2017
Updated	Jan 19, 2024

UE-46011

Ensure when adding more than one camera to world in VR mode

Ensure when adding more than one camera to world in VR mode

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