[Bug] Error when running after building with Firebase 8.10.1

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021.2.8f1
• Firebase Unity SDK version: 8.10.1
• Source you installed the SDK: .unitypackage
• Problematic Firebase Component: Crashlytics
• Other Firebase Components in use: Analytics,Auth,FireStore,Installations,Functions,Storage
• Additional SDKs you are using: Facebook, AdMob
• Platform you are using the Unity editor on: Mac(M1)
• Platform you are targeting: Android
• Scripting Runtime: IL2CPP

[REQUIRED] Please describe the issue here:

I was using Firebase 8.9.0 well before. I updated it after 8.10.0 came out and it went without any problems, but some developers had problems with python in the editor, so I updated it to 8.10.1. The python-related problem disappeared in the editor, but the following error occurred when running after build.

field_ids[i] || (field.optional == kMethodOptional)

Firebase.Crashlytics.CrashlyticsInternalPINVOKE:FirebaseCrashlyticsInternal_GetInstance__SWIG_0(HandleRef, Int32&)
Firebase.Crashlytics.FirebaseCrashlyticsInternal:GetInstance(FirebaseApp, InitResult&)
Firebase.Crashlytics.AndroidImpl:.ctor()
Firebase.Crashlytics.Impl:Make()
Firebase.Crashlytics.PlatformAccessor:.cctor()
Firebase.Crashlytics.Crashlytics:Initialize()
System.Reflection.RuntimeMethodInfo:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
Firebase.FirebaseApp:InitializeCrashlyticsIfPresent()
Firebase.FirebaseApp:CreateAndTrack(CreateDelegate, FirebaseApp)
JH.<>c:<PreLoadFirebase>b__208_1(Boolean, DependencyStatus)
Firebase.Extensions.<>c__DisplayClass4_1`1:<ContinueWithOnMainThread>b__1()
Firebase.<>c__DisplayClass5_0`1:<RunAsync>b__0()
Firebase.ExceptionAggregator:Wrap(Action)
Firebase.Dispatcher:PollJobs()
Firebase.Platform.FirebaseHandler:Update()

ApplicationException: Unable to find Field com/google/firebase/crashlytics/FirebaseCrashlytics.core (signature 'Lcom/google/firebase/crashlytics/internal/common/CrashlyticsCore;', instance).  Please verify the AAR which contains the com/google/firebase/crashlytics/FirebaseCrashlytics class is included in your app.

Firebase.Crashlytics.FirebaseCrashlyticsInternal.GetInstance (Firebase.FirebaseApp app, Firebase.InitResult& init_result_out) (at <00000000000000000000000000000000>:0)
Firebase.Crashlytics.AndroidImpl..ctor () (at <00000000000000000000000000000000>:0)
Firebase.Crashlytics.Impl.Make () (at <00000000000000000000000000000000>:0)
Firebase.Crashlytics.Crashlytics+PlatformAccessor..cctor () (at <00000000000000000000000000000000>:0)
Firebase.Crashlytics.Crashlytics.Initialize () (at <00000000000000000000000000000000>:0)
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <00000000000000000000000000000000>:0)
Firebase.FirebaseApp.InitializeCrashlyticsIfPresent () (at <00000000000000000000000000000000>:0)
Firebase.FirebaseApp.CreateAndTrack (Firebase.FirebaseApp+CreateDelegate createDelegate, Firebase.FirebaseApp existingProxy) (at <00000000000000000000000000000000>:0)
JH.FirebaseManager+<>c.<PreLoadFirebase>b__208_1 (System.Boolean success, Firebase.DependencyStatus depStatus) (at <00000000000000000000000000000000>:0)
Firebase.Extensions.TaskExtension+<>c__DisplayClass4_1`1[T].<ContinueWithOnMainThread>b__1 () (at <00000000000000000000000000000000>:0)
Firebase.Dispatcher+<>c__DisplayClass5_0`1[TResult].<RunAsync>b__0 () (at <00000000000000000000000000000000>:0)
Firebase.ExceptionAggregator.Wrap (System.Action action) (at <00000000000000000000000000000000>:0)
Firebase.Dispatcher.PollJobs () (at <00000000000000000000000000000000>:0)
Firebase.Platform.FirebaseHandler.Update () (at <00000000000000000000000000000000>:0)
Rethrow as TypeInitializationException: The type initializer for 'Firebase.Crashlytics.Crashlytics.PlatformAccessor' threw an exception.
Firebase.Crashlytics.Crashlytics.Initialize () (at <00000000000000000000000000000000>:0)
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <00000000000000000000000000000000>:0)
Firebase.FirebaseApp.InitializeCrashlyticsIfPresent () (at <00000000000000000000000000000000>:0)
Firebase.FirebaseApp.CreateAndTrack (Firebase.FirebaseApp+CreateDelegate createDelegate, Firebase.FirebaseApp existingProxy) (at <00000000000000000000000000000000>:0)
JH.FirebaseManager+<>c.<PreLoadFirebase>b__208_1 (System.Boolean success, Firebase.DependencyStatus depStatus) (at <00000000000000000000000000000000>:0)
Firebase.Extensions.TaskExtension+<>c__DisplayClass4_1`1[T].<ContinueWithOnMainThread>b__1 () (at <00000000000000000000000000000000>:0)
Firebase.Dispatcher+<>c__DisplayClass5_0`1[TResult].<RunAsync>b__0 () (at <00000000000000000000000000000000>:0)
Firebase.ExceptionAggregator.Wrap (System.Action action) (at <00000000000000000000000000000000>:0)
Firebase.Dispatcher.PollJobs () (at <00000000000000000000000000000000>:0)
Firebase.Platform.FirebaseHandler.Update () (at <00000000000000000000000000000000>:0)
Scene.<Start>d__11:MoveNext()
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

Link that came up with a similar issue when I searched it, but it is different from the current version. I was wondering if there is a way to temporarily solve this issue in the current state.

Steps to reproduce:

Import and install Firebase Unity 8.10.1 and build for Android. An error log occurs with a 100% probability when running after build.

I didn’t have time to go ahead with the QuickStart project.

[a-maurice]

Alright, for a workaround you can add the following to your custom proguard-user.txt file:

-keep,includedescriptorclasses public class com.google.firebase.crashlytics.FirebaseCrashlytics { *; }
-keep,includedescriptorclasses public class com.google.firebase.crashlytics.internal.common.CrashlyticsCore { *; }
-keep,includedescriptorclasses public class com.google.firebase.crashlytics.internal.common.DataCollectionArbiter { *; }
-keep,includedescriptorclasses public class com.google.firebase.crashlytics.ndk.FirebaseCrashlyticsNdk { *; }
-keep class com.google.firebase.crashlytics.ndk.** { *; }

[a-maurice]

Ah, so the problem seems to be when enabling minification, it is not preserving the Android library symbols correctly. We will see if we can get this fixed, and find a workaround in the meantime.