Can't get method name from named lambda

[KoBeWi]

Godot version

4.2 f7bc653

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

get_method():

Returns the name of the method represented by this Callable. If the callable is a lambda function, returns the function's name

However calling it on a named lambda results in

Can't get method on CallableCustom "test(lambda)".

(ironically the error even contains the function's name...)

get_method() in GDScriptLambdaCallable is likely unimplemented or is wrong. It should work for named lambdas.

Steps to reproduce

var fun = func test(): pass
print(fun.get_method())

Minimal reproduction project

N/A

[ElMikosch]

I want to try to fix this bug if nobody minds

[akien-mga]

Feel free to give it a try!

The relevant class is https://github.com/godotengine/godot/blob/master/modules/gdscript/gdscript_lambda_callable.h, which is an implementation of https://github.com/godotengine/godot/blob/master/core/variant/callable.h#L134

It seems not to implement the virtual get_method indeed.