FieldNameTuple!T and std.traits.Fields!T not empty for interfaces

[Steven Schveighoffer]

On 6/6/19 4:22 PM, Amex wrote:
> FieldNameTuple!T
> std.traits.Fields!T
> 
> are non-empty when T is an interface!
> 
> An interface cannot contain fields and yet these return non-zero and 
> screws up my code. While I can filter for interfaces it makes me wonder 
> what else may slip through?
> 
> Is it a bug or what is going on?

Can you provide code to demonstrate? I get no fields when I do this:

interface I
{
}

import std.traits;
pragma(msg, FieldNameTuple!I);

-Steve