TargetParameterCountException on instance event calling static methods

[marc-antoine-girard]

Description:

Unity throws TargetParameterCountException

• when an instanced ExtEvent calls a static method with one parameter (int in my case).
• It does not throw when calling a method without parameter.
• It does not throw when the ExtEvent is set to static and is calling a static method with a parameter.

Expected:

Calling a static method with one parameter using an instance event should behave the same way as calling a static method with no parameter using an instance event.

How to reproduce:

Given the code below:

public class Test : MonoBehaviour
{
    public ExtEvent voidEvent;

    private void OnEnable()
    {
        voidEvent.Invoke();
    }

    public static void StaticCallNoArg()
    {
        Debug.Log("StaticCallNoArg");
    }
    public static void StaticCallOneArg(int a)
    {
        Debug.Log($"StaticCallOneArg {a}");
    }
    public void InstanceCallNoArg()
    {
        Debug.Log("InstanceCallNoArg");
    }

    public void InstanceCallOneArg(int a)
    {
        Debug.Log($"InstanceCallOneArg {a}");
    }
}

(red one throws)

Output:

Additional information:

• Unity 2021.3.9
• ExtEvents 1.7.0