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Fixed in 2021.1.X

Fixed in 2018.4.X, 2019.4.X, 2020.3.X



Found in




Issue ID




Internal error communicating with the shader compiler process when SV_PrimitiveID is the only Input signature

Shader System


How to reproduce:
1. Open attached "" project
2. Set Graphics API to OpenGLCore
3. Select TestShader asset
4. In the Inspector, select Compile and show code
5. Observe the errors in the Inspector and Console window

Expected result: No errors appear
Actual result: Error "Internal error communicating with the shader compiler process" appears

Reproducible with: 2018.4.29f1, 2019.4.15f1, 2020.1.14f1, 2020.2.0b12, 2021.1.0a7(OpenGLES3, OpenGLCore, Vulkan)
Not reproducible with: 2018.4.29f1, 2019.4.15f1, 2020.1.14f1, 2021.1.0a7(OpenGLES2, Direct3D11)

  1. Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.0a8

  2. Resolution Note (fix version 2020.3):

    Fixed in 2020.3.5f1

  3. Resolution Note (fix version 2019.4):

    Fixed in: 2019.4.28f1

  4. Resolution Note (fix version 2018.4):

    Fixed in: 2018.4.36f1

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