Shader compiler error UE 5.1.1

Development Platform & Builds
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Hello everyone.

Today i experienced unexpected error while trying to build my game.

[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error: === Critical error: ===
[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error:
[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error: Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\ShaderCompiler\ShaderCompiler.cpp] [Line: 1227]
[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error: ShaderCompileWorker crashed!
[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error:
[2023.08.24-18.38.09:689][553]UATHelper: Packaging (Windows): LogWindows: Error: Fatal error!

Full log starting from error:
log.txt (15.0 KB)

In short error is saying that ShaderCompiler crashed at line 1227.

I been working on this project for quite a while and never experienced any build warning, errors or anything else.
Last time i build the game successfully around a week or so ago, without any errors or problems.
Also didn’t updated any plugins, drivers, engine itself, didn’t change settings in project or engine.

Upon further testing i figured out that engine itself can’t compile shaders too, for example when launching my game in standalone mode - shaders start to compile for a little bit and than standalone window crashes with the same error.
Same error goes for completely blank project or third person template.

After searching web and forum, so far i already tried few things to fix this issue:

Reinstalling GPU drivers from scratch (using DDU, my guess was that maybe drivers automatically updated or something).
Reinstalling engine completely.
Force update windows sdk.
Trying to compile with targeted RHI set to DX11 and DX12.

Nothing helped, still experiencing the same issue.

I would greatly appreciate any help, because at this point i run out of ideas how to fix this issue and it feels to me completely random, since everything was working exactly same as it is just a week ago.

Thanks in advance.

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For anyone who is wondering, the issue was in undervolted processor.

I have 13900k and of course i had it undervolted quite heavily. After removing the undervolting and putting everything to auto, shader compiler no longer return an error and works perfectly normal.

I hope it helps to someone.
Bug report already submitted too.

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