go/types, types2: confusing error message when using comparable in a union #49602
Description
What version of Go are you using (go version)?
$ go version go version devel go1.18-c2397905e0 Sat Nov 13 03:33:55 2021 +0000 darwin/arm64
Does this issue reproduce with the latest release?
No, because it includes generics
What operating system and processor architecture are you using (go env)?
Whatever the go playground runs on
What did you do?
https://gotipplay.golang.org/p/FSMOjCXAtSL
What did you expect to see?
can compile
What did you see instead?
compile error
./prog.go:6:66: cannot use comparable in union (interface contains methods)