Custom Functions using Delegates for handlers detect argument counts incorrectly

[fmoo]

What is the current behavior?

When defining a custom function in e.g., Unity Yarnspinner as follows:

runner.AddFunction<int, int, int>("rand_irange", delegate (int min, int max) {
    return UnityEngine.Random.Range(min, max + 1);
 });

The VSCode Extension reports the error:

Function rand_irange expects 0 parameters, but received 2
rand_irange

Please provide the steps to reproduce, and if possible a minimal demo of the problem:

Register a function similar to as follows:

runner.AddFunction<int, int, int>("rand_irange", delegate (int min, int max) {
    return UnityEngine.Random.Range(min, max + 1);
 });

In a yarn script, invoke as follows:

<<declare $temple_slot = 0>>
<<set $temple_slot = rand_irange(1,10)>>

What is the expected behavior?

The script works correctly at runtime, so I expect no errors to be detected by vscode

Please tell us about your environment:

• Yarn Spinner Version: 2.1
• Extension Version: v2.2.119
• Unity Version: 2019.4.36f1

Other information