Alias this and std.traits.isArray

[David]

This code worked with dmd 2.060:

import std.stdio;
import std.traits;

struct OhWhy(S) {
    S[] arr;
    alias arr this;
}

void main() {
        static assert(isArray!(OhWhy!(float)));
        
}

But fails with dmd 2.061:
ss.d(10): Error: static assert  (isArray!(OhWhy!(float))) is false

(same happens with alias this to static arrays and isArray/isStaticArray)


Is this intended or a regression? If latter, I'll submit a bug-ticket.