James Deikun

More precisely, the division goes like this: - Release title, release artist credit : from PR - Track titles, track artists credits : from PR - Artist IDs, Recording IDs,...

Affects me too, Firefox ESR 52.2.0 64 bit from firefox-esr_52.2.0esr-1~deb9u1 .deb

Hm, this does seem like a bug since the type signature of `foo` makes polymorphic recursion possible in the hole; `foo` should be shown with either a renamed type variable...

Yes https://github.com/haskell/happy/blob/1e2493c38f27ec6c90cb95bd82703799d9de84d2/examples/glr/expr-monad/Expr.y#L9 is how it should actually be done ...