As describe in this clojure-dev post, gen-interface and definterface do not properly support array type hints.

Ultimately, this is because gen-class and gen-interface use two different code paths to do essentially the same thing. Boiled down, gen-class converts hints using (Type/getType (the-class c)), whereas gen-interface uses asm-type, which uses similar, but different, logic than the-class.

In my patch, I change asm-type to match use the-class. I also add entries to the prim->class map to support primitive arrays.