Unhandled exception logging - Urgently needed

[Forestbrook]

Description

We are close to release our Maui app on iOS to a lot of users, so we urgently need a way to log unhandled exceptions.

As I understand AppCenter is not (yet?) available for Maui, so I tried to implement basic logging myself.

But it seems there is currently no way to catch unhandled exceptions on iOS.

When running under the debugger the AppDomain.CurrentDomain.UnhandledException event is thrown as expected. But when running WITHOUT debugger the event seems not to be thrown.

Same with try/catch on UIApplication.Main.

Can this be fixed urgently please and/or is there another way to log unhandled exceptions?

Steps to Reproduce

1. Build and run the MauiUnhandledExceptionTest project on an iPhone or iPad with debugger attached.
2. Press the button "Show saved exception" => App shows "No exception data found".
3. Press the button "Throw exception" and continue until the app is crashed.
4. Restart the app WITHOUT the debugger attached.
5. Press the button "Show saved exception" => App shows the thrown exception.
6. Press the button "Throw exception" => App crashes.
7. Restart the app
8. Press the button "Show saved exception" => App shows "No exception data found".

Link to public reproduction project repository

https://github.com/Forestbrook/MauiUnhandledExceptionTest

Version with bug

6.0.400

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15

Did you find any workaround?

No response

Relevant log output

No response

[Forestbrook]

See also #8463 and #5535

[jingliancui]

@Forestbrook
Alternative trying use Tencent bugly.
https://bugly.qq.com/v2/downloads

That nuget package I binded last year. Maybe too old, or you can bind the new version by yourself.
https://www.nuget.org/packages/XamarinLibrary.Xamarin.iOS.Tencent.Bugly

Hope it can help you.

[mattleibow]

Duplicate of #8463