Exception information is lost for async code #7161
Description
Android application type
Classic Xamarin.Android (MonoAndroid12.0, etc.)
Affected platform version
VS2022
Description
When an unhandled exception occurs in async code instead of the actual type and stack trace you get the following:
[mono-rt] [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object.
[mono-rt] at Android.Runtime.JNINativeWrapper._unhandled_exception (System.Exception e) [0x0000e] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:12
[mono-rt] at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V (_JniMarshal_PP_V callback, System.IntPtr jnienv, System.IntPtr klazz) [0x0001c] in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:23
[mono-rt] at (wrapper native-to-managed) Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(intptr,intptr)
It doesn't seem to matter what the original type was it's always shown as a NullReferenceException with that stack trace.
If your debugging then you get an Unhandled Exception popup that has no exception information except the wrong type (NullReferenceException) and no stack trace (it also doesn't stop on the location that threw the exception) if you then continue you get the [mono-rt] exception log from above.
This makes it almost impossible to find out/debug the problem as all relevant information is lost.
Steps to Reproduce
- Create a new Xamarin.Forms project
- Put the following code into the MainActivity.OnCreate
await Task.Delay(1000);
throw new InvalidOperationException("This exception info should not be lost");
- Run
Did you find any workaround?
no
Relevant log output
No response