Build error in Android. (UnityEditor.UIElements.StyleSheets in Runtime)

[HyunCello]

Environment
Unity: 6.3 Beta (6000.3.0b10)
Platform: Android (Player build)
OneJS: d177bad

Error

/OneJS/Runtime/CustomStyleSheets/unity-6.3+/StyleSheetImportErrors.cs(4,19): 
error CS0234: The type or namespace name 'UIElements' does not exist in the namespace 'UnityEditor' (are you missing an assembly reference?)

Suspected cause

• StyleSheetImportErrors.cs is under Runtime/CustomStyleSheets/unity-6.3+, but it uses:

using UnityEditor.UIElements.StyleSheets;

• This file is compiled into player builds (Android), where UnityEditor.* assemblies are not available, so build fails.
• In Unity 6.2 this path (unity-6.3+) was not used, so the issue did not show up. It seems to be a regression in the Unity 6.3 support code.
• Functionally this class is only needed in the Editor (to report USS stylesheet import errors), so it probably should not live in a Runtime assembly.

[Singtaa]

Thank you for the report! Yes, that using directive is problematic. But luckily, it's actually unused. Does removing it fix your building error?

59d3882

[Singtaa]

Found and fixed another related Unity6.3+UnityEditor issue: 2a2ce97

It's building fine on my end for Unity6.3 & IL2CPP. Let me know if you still have any Android build issue.