Unity3D - Failed to weave assembly.

[georgiitonchev]

What happened?

I get the "Failed to weave assembly." error for one of my assemblies in my Unity project. Happens on any assembly reload.
Tools > Realm > Weave Assemblies also produces the same result.

Repro steps

Assembly Reload due to code changes in solution -> "Failed to weave assembly."
Tools > Realm > Weave Assemblies -> "Failed to weave assembly."

Version

10.19.0

What Atlas Services are you using?

Local Database only

What type of application is this?

Unity

Client OS and version

Microsoft Windows 11 Pro - 10.0.22621 Build 22621, Unity 2021.3.16f1

Code snippets

No response

Stacktrace of the exception/crash you're getting

[Game.Dialogue] Failed to weave assembly. If the error persists, please report it to https://github.com/realm/realm-dotnet/issues: System.InvalidOperationException: Operation is not valid due to the current state of the object.
  at Mono.Collections.Generic.Collection`1+Enumerator[T].CheckState () [0x00036] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
  at Mono.Collections.Generic.Collection`1+Enumerator[T].MoveNext () [0x00000] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
  at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00059] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00059] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at RealmWeaver.Weaver+<GetReferencedTypes>d__58.MoveNext () [0x0022b] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
  at System.Linq.Enumerable+WhereEnumerableIterator`1[TSource].MoveNext () [0x0004e] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable+ConcatIterator`1[TSource].MoveNext () [0x0002b] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00059] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Set`1[TElement].UnionWith (System.Collections.Generic.IEnumerable`1[T] other) [0x00018] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].FillSet () [0x0000b] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].ToArray () [0x00000] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <1c318258bf0843289b0e2cbe692fee39>:0 
  at RealmWeaver.Weaver.WeaveSchema (Mono.Cecil.TypeDefinition[] types) [0x00070] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
  at RealmWeaver.Weaver.Execute (RealmWeaver.Analytics+Config analyticsConfig) [0x00105] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
  at RealmWeaver.UnityWeaver.WeaveAssemblyCore (System.String assemblyPath, System.Collections.Generic.IEnumerable`1[T] references, System.String framework, System.String targetOSName) [0x00066] in <847bd8c6804f451e8e587bcc6a3e4780>:0 
UnityEngine.Debug:LogError (object)
RealmWeaver.UnityWeaver/UnityLogger:Error (string,Mono.Cecil.Cil.SequencePoint)
RealmWeaver.UnityWeaver:WeaveAssemblyCore (string,System.Collections.Generic.IEnumerable`1<string>,string,string)
RealmWeaver.UnityWeaver/<>c__DisplayClass19_0:<WeaveAllAssemblies>b__0 ()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()

Relevant log output

No response

[nirinchev]

Hey, do you think you can share with us a simple repro case? It appears like there's a bug in the code that iterates over your classes to build the Realm schema and it'll be super helpful if we could get access to your project to test against.

[georgiitonchev]

Hey, @nirinchev, I've shared with you a project where the error still persists.

[nirinchev]

Thanks for this. I was able to reproduce it and as far as I can tell, it's a bug in Mono, though I can't quite put my finger on what's causing it. In any case, I have a workaround that seems to resolve the issue in the repro project you provided.

[georgiitonchev]

Great, thanks! I'll be sure to update this issue once I have an update.