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Fix In Review for 13.1.0

Fixed in 12.1.0



Found in [Package]


Issue ID




"ArgumentException: An item with the same key has already been added" when opening Shader Graph

Package: Shader Graph


Steps to reproduce:
1. Create a new HDRP/URP project
2. Right-click in Project > Assets then click Create > Shader Graph > Blank Shader Graph
3. Right-click in Project > Assets then click Import Package > Custom Package... then select attached "GaiaShaders.unitypackage", then click Import
4. Double-click on Shader Graph created in step 2

Expected result: Shader Graph Editor opens without throwing an exception
Actual result: Shader Graph Editor does not open and an exception is thrown

Reproducible with: 12.0.0 (2021.2.0b9, 2021.2.0b12, 2022.1.0a6), 13.0.0 (2022.1.0a11)
Not reproducible with: 7.7.1 (2019.4.31f1), 10.6.0 (2020.3.19f1), 10.7.0 (2020.3.19f1), 11.0.0 (2021.1.21f1), 12.0.0 (2021.2.0b8, 2022.1.0a5)

  1. Response avatar

    Resolution Note (fix version 13.1.0):

    ShaderGraph does not support multiple output slots with the same name. This will be detected and the user will be instructed to update the slots with distinct names.

  2. Response avatar

    Resolution Note (fix version 12.1.0):

    Fixed in: 2021.2.0b16.3733, Shader Graph 12.1.0

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