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Votes
1
Found in
2019.2
2019.2.15f1
2019.3
2020.1
Issue ID
1205367
Regression
Yes
"UnityEngine.dll" doesn't automatically reference its individual DLLs preventing project compilation
Reproduction steps:
1. Create a New Project and download "1205367.zip"
2. Copy the "ScriptAssemblies" folder from the projects "Library" folder and paste it into "DLL" folder
3. Copy the "Managed" folder from the Editor install folder ("Editor/Data") and paste it into "DLL" folder
4. Open the "new.csproject" file from the "Script" folder
5. "Build"
Expected Result: Build succeeds
Actual Result: Build fails
Reproduced with: 2020.1.0a17, 2019.3.0f3, 2019.2.17f1
Not reproducible with: 2019.1.14f1
Wasn't able to test on: 2018.4.15f1, 2017.4.36f1
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Resolution Note (fix version 2020.1):
After UnityEngine.UI.dll was moved to a package and now compiled by Unity, it is now compiled against the UnityEngine.*Module.dll assemblies.
This means that any assembly that referencing any of the package assemblies also needs reference the UnityEngine.*Module.dll assemblies instead of UnityEngine.dll.
In this case the compile errors is caused by a missing reference to UnityEngine.CoreModule.dll because the package UnityEngine.UI.dll references it.