Unexplained Build Error, started in last 24 hours

Unity Services
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1

Need some help trying to determine source of this error. Doesn’t appear to be due to any local changes, which were minimal (just some assets, nothing with project settings) between a working and failing build.

3926: [Unity] ERROR: Error building Player: ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
3927: [Unity] Parameter name: index
3928: [Unity] UnityEngine.StackTraceUtility:ExtractStackTrace ()
3929: [Unity] UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[ ])
3930: [Unity] UnityEngine.Logger:Log (UnityEngine.LogType,object)
3931: [Unity] UnityEngine.Debug:Log (object)
3932: [Unity] UnityEditor.CloudBuild.BuildLogger:Log (string)
3933: [Unity] UnityEditor.CloudBuild.BuildLogger:HighlightUnityErrors (string,string,UnityEngine.LogType)
3934: [Unity] UnityEngine.Application:CallLogCallback (string,string,UnityEngine.LogType,bool)
3935: [Unity] UnityEditor.BuildPipeline:BuildPlayerInternal (string[ ],string,string,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget,UnityEditor.BuildOptions,string[ ])
3936: [Unity] UnityEditor.BuildPipeline:BuildPlayer (string[ ],string,string,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget,UnityEditor.BuildOptions,string[ ])
3937: [Unity] UnityEditor.BuildPipeline:BuildPlayer (UnityEditor.BuildPlayerOptions)
3938: [Unity] UnityEditor.BuildPipeline:BuildPlayer (string[ ],string,UnityEditor.BuildTarget,UnityEditor.BuildOptions)
3939: [Unity] UnityEditor.CloudBuild.Builder:BuildPlayerDefault (UnityEditor.BuildPlayerOptions)
3940: [Unity] UnityEditor.CloudBuild.Builder:BuildPlayer (UnityEditor.BuildPlayerOptions)
3941: [Unity] UnityEditor.CloudBuild.Builder:Build ()

2

Try hit clean build.

3

Same results with clean build. Oddly we’re seeing builds pass occasionally, but seem to be failing with this error 80% of the time.

The callstack suggests the problem is with data inside UnityEditor.BuildPlayerOptions, but it looks like this is generated by UCB:

3935: [Unity] UnityEditor.BuildPipeline:BuildPlayerInternal (string[],string,string,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget,UnityEditor.BuildOptions,string[])
3936: [Unity] UnityEditor.BuildPipeline:BuildPlayer (string[],string,string,UnityEditor.BuildTargetGroup,UnityEditor.BuildTarget,UnityEditor.BuildOptions,string[])
3937: [Unity] UnityEditor.BuildPipeline:BuildPlayer (UnityEditor.BuildPlayerOptions)
3938: [Unity] UnityEditor.BuildPipeline:BuildPlayer (string[],string,UnityEditor.BuildTarget,UnityEditor.BuildOptions)
3939: [Unity] UnityEditor.CloudBuild.Builder:BuildPlayerDefault (UnityEditor.BuildPlayerOptions)
3940: [Unity] UnityEditor.CloudBuild.Builder:BuildPlayer (UnityEditor.BuildPlayerOptions)
3941: [Unity] UnityEditor.CloudBuild.Builder:Build ()

Doing local build with BuildPipeline.BuildPlayer() works fine.

Version being used for UCB: Unity 2020.3.32f1 (This was same version being used when builds were working consistently).

4

I’ve determined the problem is related to building Addressables. If I set “Build Addressables” to No, the builds pass consistently. Of course we need addressables built, so this isn’t a solution.

One option would be to build the addressables manually in a pre-build script, like:

AddressableAssetSettings.CleanPlayerContent();
AddressableAssetSettings.BuildPlayerContent();
5

So manually building the addressables in the pre-export step, rather than using the “Build Addressables” option in UCB fixes the build issues.