6.15.0 - Unity constantly crashes when entering play mode for the second time

[eladleb]

Unity editor version: 2019.3.15
Firebase Unity SDK version: 6.15.0
Source you installed the SDK: Unity Package Manager.
Firebase plugins in use: everything except firestore
Additional SDKs you are using: Facebook & AdMob
Platform you are using the Unity editor on Mac
Platform you are targeting: iOS, Android
Scripting Runtime: IL2CPP

Please describe the issue here:

After updating to 6.15.0 I started seeing this warning when I enter play mode for the 1st time:
Future with handle 1 still exists though its backing API is being deleted

After this warning is shown, the next time I enter play mode, unity crashes :(

Please answer the following, if applicable:

Have you been able to reproduce this issue with just the Firebase Unity quickstarts (this GitHub project)? - I didn't try.

What's the issue repro rate? 100% of the time.

---

Future with handle 1 still exists though its backing API 0xC624DCD0 is being deleted. Please call Future::Release() before deleting the backing API.
UnityEngine.Debug:LogWarning(Object)
Firebase.Platform.FirebaseLogger:LogMessage(PlatformLogLevel, String) (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseLogger.cs:92)
Firebase.LogUtil:LogMessage(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:68)
Firebase.LogUtil:LogMessageFromCallback(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:76)
Firebase.AppUtilPINVOKE:PollCallbacks()
Firebase.AppUtil:PollCallbacks() (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/AppUtil.cs:32)
Firebase.Platform.FirebaseAppUtils:PollCallbacks() (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/FirebaseAppUtils.cs:33)
Firebase.Platform.FirebaseHandler:Update() (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseHandler.cs:205)
Firebase.Platform.FirebaseMonoBehaviour:Update() (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseMonoBehaviour.cs:45)

---

Another similar log:

Future with handle 1 still exists though its backing API 0x43313BF0 is being deleted. Please call Future::Release() before deleting the backing API.
UnityEngine.Debug:LogWarning(Object)
Firebase.Platform.FirebaseLogger:LogMessage(PlatformLogLevel, String) (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseLogger.cs:92)
Firebase.LogUtil:LogMessage(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:68)
Firebase.LogUtil:LogMessageFromCallback(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:76)
Firebase.AppUtilPINVOKE:PollCallbacks()
Firebase.AppUtil:PollCallbacks() (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/AppUtil.cs:32)
Firebase.Platform.FirebaseAppUtils:PollCallbacks() (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/FirebaseAppUtils.cs:33)
Firebase.Platform.FirebaseHandler:Update() (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseHandler.cs:205)
Firebase.Platform.FirebaseEditorDispatcher:Update() (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseEditorDispatcher.cs:102)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions() (at /Users/builduser/buildslave/unity/build/Editor/Mono/EditorApplication.cs:310)

[google-oss-bot]

This issue does not seem to follow the issue template. Make sure you provide all the required information.

[npicouet]

I'm having this issue as well.
Editor log is spamming this over and over:
Fallback handler could not load library /Applications/Unity/Hub/Editor/2019.3.13f1/Unity.app/Contents/Frameworks/Mono/lib/libPackages/com.google.firebase.app/Firebase/Plugins/x86_64/FirebaseCppApp-6_15_0.bundle

EDIT: Not sure on the exact cause, but yeah its completely unusable. Crashes every time code compiles after hitting play once in editor.

[brianchasalow]

Seeing the same crash here as of 6.15.0, totally unusable. need to roll back to .14.
Similar crash.
Future with handle 1 still exists though its backing API 0x40F2420 is being deleted. Please call Future::Release() before deleting the backing API.

@mikehaney24

Seems to fire on:
DatabaseReference userStatusDatabaseRef = FirebaseDatabase.DefaultInstance.GetReference("/status/" + uid);

Future with handle 1 still exists though its backing API 0x40F2420 is being deleted. Please call Future::Release() before deleting the backing API.
UnityEngine.Debug:LogWarning(Object)
Firebase.Platform.FirebaseLogger:LogMessage(PlatformLogLevel, String) (at Z:/tmp/tmp.la3ltWQdKA/firebase/app/client/unity/src/Unity/FirebaseLogger.cs:92)
Firebase.LogUtil:LogMessage(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:68)
Firebase.LogUtil:LogMessageFromCallback(LogLevel, String) (at Z:/tmp/tmp.txs8ldQ514/firebase/app/client/unity/proxy/LogUtil.cs:76)
Firebase.Database.Internal.DatabaseInternalPINVOKE:InternalFirebaseDatabase_GetReference__SWIG_1(HandleRef, String)
Firebase.Database.Internal.InternalFirebaseDatabase:GetReference(String) (at Z:/tmp/tmp.DJxfWWKRuH/firebase/database/client/unity/proxy/InternalFirebaseDatabase.cs:92)
Firebase.Database.FirebaseDatabase:GetReference(String) (at Z:/tmp/tmp.DJxfWWKRuH/firebase/database/client/unity/proxy/FirebaseDatabase.cs:182)
FirebaseConnector:CheckOnlineStatus(Boolean) (at Assets/LightDiver/Firebase/FirebaseConnector.cs:1016)

[eladleb]

We also rolled back to 6.14.1 until someone from firebase could provide us with some guidance :(

[mohamad-al-amaary]

There goes my excitement for the unity cleanup crashfix for ios watchdog transgression issue rolled out with this version, meh

[mohamad-al-amaary]

Just tested a little more, it's not about GetReference for my specific project as I didn't use a database for this one. I use Auth, Remote Config, Analytics only for this and after debugging it seems it's only about Auth module. I use similar code to the docs and only use Anonymous authentication, hope it helps you solve it :) If the person above me had an issue with GetReference, I'm afraid it might also affect database module, did not test in my other projects.

Edit: Doesn't happen as often on Windows as on Mac

[aidanwolf]

Same exact issue after upgrading to 6.15.

Found this in the crash report, seems to be Firebase Auth related:
Thread 57 Crashed:: Finalizer 0 libsystem_kernel.dylib 0x00007fff6f81e33a __pthread_kill + 10 1 libsystem_pthread.dylib 0x00007fff6f8dae60 pthread_kill + 430 2 libsystem_c.dylib 0x00007fff6f7a5808 abort + 120 3 com.unity3d.UnityEditor5.x 0x00000001065f32de HandleSignal(int, __siginfo*, void*) + 62 4 libmonobdwgc-2.0.dylib 0x0000000142e7a16d mono_chain_signal + 79 5 libmonobdwgc-2.0.dylib 0x0000000142d4b3ef mono_sigsegv_signal_handler + 414 6 libsystem_platform.dylib 0x00007fff6f8cf5fd _sigtramp + 29 7 ??? 000000000000000000 0 + 0 8 FirebaseCppApp-6_15_0.bundle 0x00000001648fd8de firebase::FutureBackingData::~FutureBackingData() + 110 9 FirebaseCppApp-6_15_0.bundle 0x00000001648fdc5f firebase::ReferenceCountedFutureImpl::~ReferenceCountedFutureImpl() + 367 10 FirebaseCppApp-6_15_0.bundle 0x000000016421d364 firebase::auth::Auth::DeleteInternal() + 516 11 FirebaseCppApp-6_15_0.bundle 0x000000016421d429 firebase::auth::Auth::~Auth() + 9 12 FirebaseCppApp-6_15_0.bundle 0x00000001640f0423 firebase::CppInstanceManager<firebase::auth::Auth>::ReleaseReference(firebase::auth::Auth*) + 323 13 ??? 0x000000016632f18b 0 + 6009581963 14 ??? 0x000000016632c883 0 + 6009571459

[EricBatlle]

Similar problem using RealtimeDatabase in Unity 2019.3 on a Xiaomi Pocophone.

public void OnDatabaseStuff()
    {
        database.GetReference("users/Eric").GetValueAsync().ContinueWithOnMainThread(task =>
        {
            if (task.IsFaulted)
            {
                // Handle the error...
            }
            else if (task.IsCompleted)
            {
                DataSnapshot snapshot = task.Result;
                // Do something with snapshot...
                dataShot = snapshot;
                foreach (var childShot in dataShot.Children)
                {
                    Debug.Log(childShot.Value.ToString());
                }
                Dictionary<string, object> child = dataShot.Value as Dictionary<string, object>;
                Debug.Log(child["Eric"].ToString());
            }
        });
    }

I was thinking that changing from ContinueWith to ContinueWithOnMainThread will solve it, but it doesn't. Still showing the warning, any idea?

[shlighter]

Similiar issue SDK 6.15.0 Unity 2019.3.13f1 every time SetValueAsync is called . Rolling back to 6.14
Future with handle 1 still exists though its backing API 0x3FDCABE0 is being deleted. Please call Future::Release() before deleting the backing API.
UnityEngine.Debug:LogWarning(Object)

[copypasteearth]

I'm having the same issue only using Auth 6.15

public class menu : MonoBehaviour
{
        public GameObject signInButton;
        public GameObject registerPanel;
        public GameObject registerInputPanel;
        public InputField registerEmailText;
        public InputField registerPasswordText;
        public GameObject signinPanel;
        public InputField signinEmail;
        public InputField signinPassword;
        FirebaseApp app;
        Firebase.Auth.FirebaseAuth auth;
        protected Firebase.Auth.FirebaseAuth otherAuth;
        Firebase.Auth.FirebaseUser user;
        public bool isSignedIn = false;
        private Firebase.AppOptions otherAuthOptions = new Firebase.AppOptions {
                ApiKey = "",
                AppId = "",
                ProjectId = ""
        };
        // Start is called before the first frame update
        void Start()
    {
                //what is going
                
                Firebase.FirebaseApp.CheckAndFixDependenciesAsync ().ContinueWithOnMainThread (task => {
                        var dependencyStatus = task.Result;
                        if (dependencyStatus == Firebase.DependencyStatus.Available) {
                                // Create and hold a reference to your FirebaseApp,
                                // where app is a Firebase.FirebaseApp property of your application class.
                                //Firebase.AppOptions ops = new Firebase.AppOptions ();
                                //app = Firebase.FirebaseApp.Create (ops);
                                InitializeFirebase ();
                                //app = Firebase.FirebaseApp.DefaultInstance;

                                print ("success with firebase");

                                // Set a flag here to indicate whether Firebase is ready to use by your app.
                        } else {
                                UnityEngine.Debug.LogError (System.String.Format (
                                  "Could not resolve all Firebase dependencies: {0}", dependencyStatus));
                                // Firebase Unity SDK is not safe to use here.
                        }
                });
        }

    // Update is called once per frame
    void Update()
    {
        
    }
        public void registerClicked ()
    {
                registerPanel.SetActive (false);
                registerInputPanel.SetActive (true);
    }
        public void actualSignIn ()
    {
                registerPanel.SetActive (false);
                signinPanel.SetActive (true);
        }
        public void signInButtonClicked ()
    {
        if (!isSignedIn) {
                        registerPanel.SetActive (true);
        } else {
                        auth.SignOut ();
                        print ("signed out");
                }
                
    }
        public void doSignIn ()
    {
                signinPanel.SetActive (false);
                auth.SignInWithEmailAndPasswordAsync (signinEmail.text, signinPassword.text).ContinueWith (task => {
                        if (task.IsCanceled) {
                                Debug.LogError ("SignInWithEmailAndPasswordAsync was canceled.");
                                return;
                        }
                        if (task.IsFaulted) {
                                Debug.LogError ("SignInWithEmailAndPasswordAsync encountered an error: " + task.Exception);
                                return;
                        }

                        Firebase.Auth.FirebaseUser newUser = task.Result;
                        Debug.LogFormat ("User signed in successfully: {0} ({1})",
                            newUser.DisplayName, newUser.UserId);
                });
        }
        public void createAccount ()
    {
                registerInputPanel.SetActive (false);
                print ("email: " + registerEmailText.text + "     password: " + registerPasswordText.text);
                auth.CreateUserWithEmailAndPasswordAsync (registerEmailText.text, registerPasswordText.text).ContinueWith (task => {
                        if (task.IsCanceled) {
                                Debug.LogError ("CreateUserWithEmailAndPasswordAsync was canceled.");
                                return;
                        }
                        if (task.IsFaulted) {
                                Debug.LogError ("CreateUserWithEmailAndPasswordAsync encountered an error: " + task.Exception);
                                return;
                        }

                        // Firebase user has been created.
                        Firebase.Auth.FirebaseUser newUser = task.Result;
                        Debug.LogFormat ("Firebase user created successfully: {0} ({1})",
                            newUser.DisplayName, newUser.UserId);
                });
        }
        void OnDestroy ()
        {
                print ("destroy");

                auth.StateChanged -= AuthStateChanged;
                
                auth = null;
                if (otherAuth != null) {
                        otherAuth.StateChanged -= AuthStateChanged;
                        
                        otherAuth = null;
                }
                
        }
        void InitializeFirebase ()
        {
                print ("Setting up Firebase Auth");
                auth = Firebase.Auth.FirebaseAuth.DefaultInstance;
                auth.StateChanged += AuthStateChanged;
                
                // Specify valid options to construct a secondary authentication object.
                if (otherAuthOptions != null &&
                    !(String.IsNullOrEmpty (otherAuthOptions.ApiKey) ||
                      String.IsNullOrEmpty (otherAuthOptions.AppId) ||
                      String.IsNullOrEmpty (otherAuthOptions.ProjectId))) {
                        try {
                                otherAuth = Firebase.Auth.FirebaseAuth.GetAuth (Firebase.FirebaseApp.Create (
                                  otherAuthOptions, "Secondary"));
                                otherAuth.StateChanged += AuthStateChanged;
                                
                        } catch (Exception) {
                                print ("ERROR: Failed to initialize secondary authentication object.");
                        }
                }
                AuthStateChanged (this, null);
        }
    
    private void OnApplicationQuit ()
    {
                print ("app quiting");
                //app.Dispose ();
                //FirebaseApp.DefaultInstance.Dispose ();
        }

    void AuthStateChanged (object sender, System.EventArgs eventArgs)
        {
                if (auth.CurrentUser != user) {
                        bool signedIn = user != auth.CurrentUser && auth.CurrentUser != null;
                        if (!signedIn && user != null) {
                                print ("Signed out " + user.UserId);
                        }
                        user = auth.CurrentUser;
                        if (signedIn) {
                                isSignedIn = true;
                                signInButton.transform.Find ("Text").gameObject.GetComponent<Text> ().text = "Sign Out";
                                print ("Signed in " + user.UserId);
                                
                        }
                }
        }

[cynthiajoan]

Thanks all for providing all the details. We are working on a fix and will post update when there is progress.