Bug Unity 2019.3.15 - Crash on launch due to shader warmup

Just wanted to post this here in case it saves some people some time.
If you upgrade to 2019.3.15 and notice that the editor silently crashes when opening your project you may be experiencing a bug that I was struggling with.

I was seeing this stack trace in the Editor.log.

Code (CSharp):

1. ========== OUTPUTTING STACK TRACE ==================
2.  
3. 0x00007FF63B8173E9 (Unity) GetRenderPipelineScript
4. 0x00007FF63B8227B7 (Unity) ScriptableRenderContext::ShouldUseRenderPipeline
5. 0x00007FF63BAC999C (Unity) ShouldGenerateTiersForSnippet
6. 0x00007FF63BAD6AD6 (Unity) ShaderLab::Program::CompileShaderSubProgram
7. 0x00007FF63BAD89F6 (Unity) ShaderLab::Program::GetMatchingSubProgram
8. 0x00007FF63BAE046E (Unity) ShaderLab::ShaderState::FindSubProgramsToUse
9. 0x00007FF63BADE88B (Unity) ShaderLab::ShaderState::ApplyShaderState
10. 0x00007FF63BACE609 (Unity) ShaderLab::Pass::ApplyPass
11. 0x00007FF63BAB9458 (Unity) DrawVBOChunkWithPass
12. 0x00007FF63BAC991F (Unity) ShaderWarmupFuncImpl
13. 0x00007FF63BACB717 (Unity) ShaderVariantCollection::WarmupOneShaderImpl
14. 0x00007FF63BACC289 (Unity) ShaderVariantCollection::WarmupShadersImpl
15. 0x00007FF63BACBA52 (Unity) ShaderVariantCollection::WarmupShaders
16. 0x00007FF63B1D66C1 (Unity) GraphicsSettings::WarmupPreloadedShaders
17. 0x00007FF63B979D33 (Unity) InitializeEngineGraphics
18. 0x00007FF639D4551C (Unity) Application::InitializeProject
19. 0x00007FF63A6C0BC4 (Unity) WinMain
20. 0x00007FF63D692692 (Unity) __scrt_common_main_seh
21. 0x00007FF8AF8D7BD4 (KERNEL32) BaseThreadInitThunk
22. 0x00007FF8B0CCCE51 (ntdll) RtlUserThreadStart
23.  
24. ========== END OF STACKTRACE ===========

As a workaround, you can remove your shader variants from your project settings. You can delete your project's Library folder and open the project in the editor. Go to Project Settings > Graphics and remove pre-warming your shader variants collection. Then the project will open consistently after removing your shader variants.

I have submitted bug (1251734) to have them fix it in a new version.

 

This happens on 2019.3.14 as well.
Caused by the graphics settings preloading shaders / shader variant collection.

I've added yesterday a shader variants collection to the project, and was unable to start .14 version. (Infinite loading instead of the crash)

Updated to the .15 and got the same crash stack.

 

Also, its possible to manually remove preloaded shader variants without deleting library. After that project loads.

In ProjectsSettings/GraphicsSettings.asset remove lines related to the m_PreloadedShaders.
(via any text editor if your asset serialization is set to text)

 

I got a freeze today in 2019.3.15, when i instanced an object (a bullet with trails and effects). The editor's screen freezed, I had to wait more than 1 minute to get back my sytem. Then the editor's screen stay white. I pressed close , and i got a would you like to save popup. Our testers got random crashes too.. Unity has never get stable build for HDRP.

 

I got the same issue since 2019.3.15.
Removing the shader variant is not a fix as we need them (we use asset bundles).
2019.4 LTS has the same issue. Pink textures everywhere now, we can't update to LTS without this fix.
@Ferazel Do you have a link to the issue? So I can vote.

 

I'm also experiencing this after upgrading to Unity 2019 LTS. I would like to add my vote to the issue too. @Ferazel Can you please provide a link to it? Thanks.

 

Here you go:
https://issuetracker.unity3d.com/is...-project-contains-a-shader-variant-collection

Looks like a fix is already in the pipe.