Incorrect ParameterIdentifierTuple results?

[John Chapman]

On Friday, 30 November 2018 at 19:07:14 UTC, Neia Neutuladh wrote:
> Compiler and version would be helpful here.
>
> I'm on DMD 2.081.1 and it yields the same results in each case: 
> _param_0

Hmm, I was calling ParameterIdentifierTuple inside a lambda - 
once I moved it into my main function I got the same output as 
you.

But … change SomeType to an interface and it reproduces the issue 
I reported above.

interface SomeType {
   void wrong(SomeType);
   void right(int);
}

I'm on DMD 2.083.0.