Shader editor: undefined function called with argument(s) error reads "Too many arguments" instead of "undefined function"

[hsandt]

Godot version

v4.0.beta13.official [caacade]

System information

Linux Ubuntu 20.04 with Unity desktop

Issue description

When calling an undefined function in the shader editor with argument(s), such as undefined_function(1), the error reads:

Too many arguments for "undefined_function()" call. Expected at most 0 but received 1.

instead of the expected:

No matching function found for: 'undefined_function'.

This is possibly a regression introduced in #18225, since the latter was focused on the arguments part.

To avoid such regression in the future, consider adding a unit test with this case (and, in fact, unit tests for the other signature errors too if there are not already).

Steps to reproduce

1. Create a shader resource and open the shader editor
2. Enter undefined_function(1); in the fragment() definition

Minimal reproduction project

N/A