Unreal Engine Issues

UE-121129

Shader compilation failure crash with DX12, Tesselation, Distance fields, Instanced Stereo, and Hierarchical LOD Coloration viewmode

Shader compilation failure crash with DX12, Tesselation, Distance fields, Instanced Stereo, and Hierarchical LOD Coloration viewmode

Description

upd. Regression was checked on //UE4/Release-4.26 CL 15973114, issue wasn't reproduced. Regression - YES

Shader compilation failure crash with DX12, Tesselation, Instanced Stereo, and Hierarchical LOD Coloration viewmode, with a shader like the following: [Image Removed]

Steps to Reproduce
  1. Open attached project
  2. Assign NewMaterial material in the project to a static mesh in the level
  3. Change view mode to Hierarchical LOD Coloration

Step 3 may or may not be required, but I didn't personally experience a crash until using that view mode.

Callstack

 

LoginId:aff2526a40664d4c3c66ba9dff19a256
EpicAccountId:c687981c4d1f4b3499c0bb1908069a2a
Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/RHI/Private/PipelineStateCache.cpp] [Line: 139] Shader compilation failures are Fatal.
UE4Editor_RHI!FCompilePipelineStateTask::DoTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\RHI\Private\PipelineStateCache.cpp:907]
UE4Editor_RHI!TGraphTask<FCompilePipelineStateTask>::ExecuteTask() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:886]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasks() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:1065]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasksUntilQuit() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:888]
UE4Editor_Core!FTaskThreadAnyThread::Run() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:965]
UE4Editor_Core!FRunnableThreadWin::Run() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:86]

 

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Won't Fix
ComponentUE - Graphics Features
Affects Versions4.26.2, 4.27
Target Fix4.27.2
CreatedAug 5, 2021
ResolvedSep 29, 2021
UpdatedSep 29, 2021
View Jira Issue