Error in the Console when classes are moved to another assembly

Unity: Scripting Buildtime

As Designed

2023.3.X

2023.2.X

2022.3.X

2021.3.X

The reason this is happening is because the Lib3 are Referencing Lib2. Lib2 are compiled with .net framework as its an "Editor" Assembly. .net framework can reference .net standard in this case, so if you switch the References the problem should go away. In 2023 there was an option added to change the Editor assemblies to be compiled with net standard, this is also an option to solve the issue.

How to reproduce:
1. Open the attached “reproprojectCS.zip“ project

Expected result: No error in the Console
Actual result: “error CS7069: Reference to type 'Span<>' claims it is defined in 'mscorlib', but it could not be found“ error in the Console

Reproducible with: 2021.3.35f1, 2022.3.20f1, 2023.2.11f1, 2023.3.0b8

Reproducible on: macOS 14.2.1 Sonoma (Intel)
Not reproducible on: No other environment tested

Note: The user noted that compilation succeeds when replicating the assemblies and classes in normal .NET Standard 2.1 projects outside of Unity

Error in the Console when classes are moved to another assembly

Unity: Scripting Buildtime

As Designed

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Have a workaround or additional info about this issue?

Error in the Console when classes are moved to another assembly

Unity: Scripting Buildtime

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As Designed

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?