Fatal Exception: UnityEngine.Application.CallLogCallback(UnityEngine.Application)

[SergeyGoncharenko]

Can anyone please explain me how to fix a crash, that Crashlytics by Firebase is reporting:

Fatal Exception: java.lang.Exception: NullReferenceException : Object reference not set to an instance of an object.
at UnityEngine.Application.CallLogCallback(UnityEngine.Application)

I am using Unity 2020.3.20f1, Firebase 11.5.0.

[YagirX]

Up

[Tomas1856]

How are you using that method, there are no known bugs with Application.CallLogCallback.

Also Unity 2020.x is no longer supported, you might want to switch to supported Unity LTS version.

[SergeyGoncharenko]

The thing is, I don’t use this method at all. Debug.Log or Debug.LogWarning only.

[Tomas1856]

It’s used by this API - Unity - Scripting API: Application.LogCallback

[SergeyGoncharenko]

Ok i found something in the third-party sdk (Appmetrica).

There is a reference to “Instance” in the HandleLog method, probably here is the reason of crashes.

[Tomas1856]

You could an extra check here

if (Instance == null)
   return;

maybe that will help.

[SergeyGoncharenko]

Got it, thanks!

[katoun]

@Tomas1856

It’s used by this API - https://docs.unity3d.com/ScriptReference/Application.LogCallback.html

Is there a way I could get the Exception object from a Debug.LogException from a callback like Application.logMessageReceived without creating a custom ILogHandler that is a wrapper ontop of the DefaultLogHandler that in the end will add a new entry in the callstack of the LogException? Some type of exceptions like FirebaseException have an ErrorCode field that is not added to their Message and I would need the access to it to manualy log it.