What version of Go are you using (go version)?

The Go 2 dev playground at https://go2goplay.golang.org/

What did you do?

Full example: https://go2goplay.golang.org/p/U43Cljg2tvj

Excerpt:

type I interface {
	F()
}

func takesI(type T I)(t T) {
	_ = T.F
}

func workaround(type T I)(t T) {
	_ = (T).F
}

As shown in the full example in the playground link above, calling takesI with T = *SomeType results in compilation failing. Calling workaround is fine, and since the only difference is the manual wrapping of parenthesis this indicates to me that the generated code is just missing grouping of its own which is causing the errors.

What did you see instead?

Error messages during compilation:

./prog.go2:4: invalid method expression P.F (needs pointer receiver: (*P).F)
./prog.go2:4: invalid indirect of V.F (type func(V))