[generics] Casting to an interface with type constraints produces an internal error in the go2go playground

[Alexandr Gulak]

Expected behavior: I think it should fail on the type checking step saying we cannot have a variable of that type

Steps to reproduce: https://go2goplay.golang.org/p/RVTj-tORXip

[Ian Lance Taylor]

On Thu, Jul 9, 2020 at 6:08 PM Alexandr Gulak <lx.g...@gmail.com> wrote:
>
> Expected behavior: I think it should fail on the type checking step saying we cannot have a variable of that type
>
> Steps to reproduce: https://go2goplay.golang.org/p/RVTj-tORXip

I agree that it looks like the type checker should report an error for
that code.

Ian