Crash Logs Not Generating in .NET MAUI iOS App Using Firebase Crashlytics

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

---

[severity:It's more difficult to complete my work]
I am experiencing an issue where crash logs are not being generated in my .NET 8.0 MAUI iOS application. I am using the latest version of Xamarin.Firebase.iOS.Crashlytics (8.10.0.3) for Firebase Crash Analytics. Despite implementing the setup as documented, crashes are not being reported to Firebase.

Environment Details:

• Framework: .NET 8.0
• Firebase Crashlytics Library: Xamarin.Firebase.iOS.Crashlytics v8.10.0.3
• Platform: iOS

MAUI Configuration: Below is the code used to register Firebase services in MauiProgram.cs:

private static MauiAppBuilder RegisterFirebase(this MauiAppBuilder builder)
    {
        try
        {
            builder. ConfigureLifecycleEvents(events =>
          {
#if IOS
              events. AddiOS(iOS => iOS.FinishedLaunching((app, launchOptions) =>
              {
                  Firebase.Core.App.Configure();
                  Firebase.Crashlytics.Crashlytics.SharedInstance.Init();
                  Firebase.Crashlytics.Crashlytics.SharedInstance.SetCrashlyticsCollectionEnabled(true);
                  Firebase.Crashlytics.Crashlytics.SharedInstance.SendUnsentReports();
                  return false;
              }));
#else
            events. AddAndroid(android => android. OnCreate((activity, bundle) => {
                Firebase.FirebaseApp.InitializeApp(activity);
            }));
#endif
          });

return builder;
        }
        catch (Exception ex)
        {

Console.WriteLine($"Message  ==================:- {ex. Message}");
            Console.WriteLine($"StackTrace ====================== :- {ex. StackTrace}");
            Console.WriteLine($"InnerException =======================:- {ex. InnerException}");
            throw;
        }
    }

Steps to Reproduce:
1.Create a new .NET MAUI project targeting iOS.
2.Add the Xamarin.Firebase.iOS.Crashlytics NuGet package (v8.10.0.3).
3.Implement Firebase Crashlytics initialization in MauiProgram.cs as shown above.
4.Trigger a crash in the app using:

Firebase.Crashlytics.Crashlytics.SharedInstance.Log("Testing crash.");
throw new Exception("Test crash");

5. Observe that no crash logs appear in the Firebase Console.

Expected Behavior:
Crash logs should appear in the Firebase Console after the app crashes.

Additional Information:
The issue occurs only on iOS; Android appears to function correctly.
No error or warning logs related to Firebase Crashlytics are observed in the app output.

Request:
I would appreciate guidance on resolving this issue or confirmation if it is a known problem with .NET 8.0 or the Xamarin.Firebase.iOS.Crashlytics library.

Thank you for your assistance.

---

Original Comments

Feedback Bot on 1/16/2025, 09:39 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

[microsoft-github-policy-service]

Hi @vsfeedback. We have added the "need-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/xamarin/xamarin-macios/blob/main/docs/bug-repro.md
This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[microsoft-github-policy-service]

Hi @vsfeedback. Due to inactivity, we will be closing this issue. Please feel free to re-open this issue if the issue persists. For enhanced visibility, if over 7 days have passed, please open a new issue and link this issue there. Thank you.