[Bug] Building an Android project in Unity 2021.2.0b1 (beta) may cause a runtime exception in the Unity Editor when looking up GetApplicationIdentifier in UnityCompat.cs.

[patm1987]

[READ] For Firebase Unity SDK issues, please report to Firebase Unity Sample

Once you've read this section and determined that your issue is appropriate for this repository, please delete this section.

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021.2.0b1.3029
• External Dependency Manager version: 1.2.162
• Source you installed EDM4U: .unitypackage
• Features in External Dependency Manager in use: Android Resolver
• Plugins SDK in use: Google Play
• Platform you are using the Unity editor on: Windows

[REQUIRED] Please describe the issue here:

After performing an Android build (and every time launching the editor after that build), Unity repeatedly logs:

AmbiguousMatchException: Ambiguous match found.
  at System.RuntimeType.GetMethodImplCommon (System.String name, System.Int32 genericParameterCount, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, System.Reflection.CallingConventions callConv, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) [0x00050] in <fd976842c3634855aba83404a44c7daa>:0 
  at System.RuntimeType.GetMethodImpl (System.String name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, System.Reflection.CallingConventions callConv, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) [0x00000] in <fd976842c3634855aba83404a44c7daa>:0 
  at System.Type.GetMethod (System.String name, System.Reflection.BindingFlags bindingAttr) [0x0000e] in <fd976842c3634855aba83404a44c7daa>:0 
  at System.Type.GetMethod (System.String name) [0x00000] in <fd976842c3634855aba83404a44c7daa>:0 
  at GooglePlayServices.UnityCompat.GetUnity56AndAboveApplicationIdentifier (UnityEditor.BuildTarget buildTarget) [0x00000] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/UnityCompat.cs:446 
  at GooglePlayServices.UnityCompat.GetApplicationId (UnityEditor.BuildTarget buildTarget) [0x00000] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/UnityCompat.cs:500 
  at GooglePlayServices.PlayServicesResolver.GetAndroidApplicationId () [0x00000] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/PlayServicesResolver.cs:1041 
  at GooglePlayServices.PlayServicesResolver.<PollBundleId>m__36 () [0x00000] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/PlayServicesResolver.cs:1429 
  at GooglePlayServices.PlayServicesResolver+PropertyPoller`1[T].Poll (System.Func`1[TResult] getCurrentValue, GooglePlayServices.PlayServicesResolver+PropertyPoller`1+Changed[T] changed) [0x0002f] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/PlayServicesResolver.cs:343 
  at GooglePlayServices.PlayServicesResolver.PollBundleId () [0x00000] in /Users/chkuang/Workspace/Git/unity-jar-resolver/source/AndroidResolver/src/PlayServicesResolver.cs:1429 
  at UnityEditor.EditorApplication.Internal_CallUpdateFunctions () [0x00032] in <ca192453d8394227952a14f40675979e>:0 

The issue appears to be this line:

        var getApplicationIdentifierMethod =
            typeof(UnityEditor.PlayerSettings).GetMethod("GetApplicationIdentifier");

Further investigation reveals that Unity defines both:

public static string GetApplicationIdentifier(NamedBuildTarget buildTarget)

and

public static string GetApplicationIdentifier(BuildTargetGroup targetGroup)

The solution is likely to request the implementation of the method that takes a BuildTargetGroup to eliminate the conflicting name and allow this code to work:

      BuildTargetGroup buildTargetGroup = UnityCompat.ConvertBuildTargetToBuildTargetGroup(buildTarget);
      if (buildTargetGroup == BuildTargetGroup.Unknown)
        return (string) null;
      return method.Invoke((object) null, new object[1]
      {
        (object) buildTargetGroup
      }) as string;

Please answer the following, if applicable:

What's the issue repro rate? 100%

What happened? How can we make the problem occur?
Add a plugin that uses EDM4U to a Unity 2021.2.0b1 project. After building for Android, you should start to see these logs. Tested in both Firebase and with the Play plugin for Unity.

If you have a downloadable sample project that reproduces the bug you're reporting, you will
likely receive a faster response on your issue.

[joaquingrech]

Yeah this is the same problem I reported last week at #440
I warned that people would begin coming here as soon as Unity got out to public beta with this bug... and not much was done about it :(

[patm1987]

I created a PR that may fix it: #449

[DellaBitta]

Thanks for the amazin ticket @patm1987! As mentioned, the discovery of this issue is being tracked already so I'm going to close this issue as a Duplicate #440. Thanks!

[chkuang-g]

Reopen the bug until we check the PR #449

[chkuang-g]

Reviewed. #449 looks like a valid fix. Will comment on #440 for visibility