Questions about formal parameters of methods in script files

[nczsl]

Found an error, when defining a method in the .csx file, if the parameter of the method has the same name as a previously existing variable then this error will be raised, in my test example, the name and type of this variable are the same as this parameter, then this error will be raised, this error will make the parameter partially invalidated, in my example, when the method for loop, the parameters in it do not work, and the loop operation is not completed as expected

The formal parameter in the above figure is mt is the situation before I changed it, it was mtdetail, and it did not enter the loop in the method at runtime

[filipw]

I am not sure I understand what is the problem here.
Could you please provide a simple script with reproduction steps?