my xamarin android app, which was working fine, started to crash on each launch with this exception.
The app is built from appcenter's build service, as it always has. If i build it locally in Debug or Release mode, it launches fine. Using a device with Android 7.
Did anyone encountered this exception and knows what to do ?
Ty !
18828 W monodroid: Calling into managed runtime init
E mono :
E mono : Unhandled Exception:
E mono : System.TypeInitializationException: The type initializer for 'Android.Runtime.UncaughtExceptionHandler' threw an exception. ---> System.ArgumentNullException: Value cannot be null.
E mono : Parameter name: method
E mono : at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, System.Boolean throwOnBindFailure, System.Boolean allowClosed) <0x56d026b4 + 0x00d74> in :0
E mono : at System.Delegate.CreateDelegate (System.Type type, System.Reflection.MethodInfo method) <0x56d03594 + 0x0001f> in :0
: at Android.Runtime.UncaughtExceptionHandler..cctor () <0x57d908a4 + 0x0003f> in :0
: --- End of inner exception stack trace ---
: at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_generic_class_init (intptr)
: at Android.Runtime.JNIEnv.Initialize (Android.Runtime.JnienvInitializeArgs* args)
-- EDIT
All AOT/LVVM/Concurrent garbage collector/proguard/multidex options are enabled
-- EDIT 2
Source code of error: https://github.com/xamarin/xamarin-android/blob/master/src/Mono.Android/Android.Runtime/UncaughtExceptionHandler.cs
static UncaughtExceptionHandler ()
{
var mono_UnhandledException = typeof (System.Diagnostics.Debugger)
.GetMethod ("Mono_UnhandledException", BindingFlags.NonPublic | BindingFlags.Static);
mono_unhandled_exception = (Action<Exception>) Delegate.CreateDelegate (typeof(Action<Exception>), mono_UnhandledException);
var ad_due = typeof (AppDomain)
.GetMethod ("DoUnhandledException",
bindingAttr: BindingFlags.NonPublic | BindingFlags.Instance,
binder: null,
types: new []{typeof (UnhandledExceptionEventArgs)},
modifiers: null);
if (ad_due != null) {
AppDomain_DoUnhandledException = (Action<AppDomain, UnhandledExceptionEventArgs>) Delegate.CreateDelegate (
typeof (Action<AppDomain, UnhandledExceptionEventArgs>), ad_due);
}
}
So it seems either mono_UnhandledException is null or AppDomain_DoUnhandledException is null.
Will try to upgrade or downgrade mono version in appcenter. It should be wrong.
-- EDIT 3
AppDomain.cs has changed recently in mono:
But DoUnhandledException has not changed.
-- EDIT 4
Works fine when built/published locally. So the problem is specific to appcenter.
