Unreal Engine Issues

UE-72741

ARKit - ARKitCameraMaterial crash

ARKit - ARKitCameraMaterial crash

Description

Spawning an object with ARKitCameraMaterial will now crash the app.

Tested with 2nd Gen iPad Pro (A1701)

Verified in 4.23 MAIN @ CL 5806859 (Needed to install from IPA)

Steps to Reproduce
  1. Create Blueprint AR Template in 4.22
  2. Assign ARKitCameraMaterial (Camera passthrough mat located in ARKit plugin content) to BP_Placeable -> ContactShadow mesh.
  3. Deploy to device, launch app

Result: When spawning BP_Placeable the app will crash.

Callstack
[UE4] Assertion failed: UniformExpressionCache.bUpToDate && UniformExpressionCache.UniformBuffer [File:/Users/joe.conley/Perforce/UE4/Release-4.22/Engine/Source/Runtime/Renderer/Private/ShaderBaseClasses.cpp] [Line: 379]

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Fixed
ComponentUE - Platform - XR
Affects Versions4.22, 4.23
Target Fix4.23
Fix Commit6536495
Main Commit6536505
CreatedApr 12, 2019
ResolvedMay 16, 2019
UpdatedJul 27, 2020
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