cmd/compile: compiler accepts range over int for any language version

[griesemer]

Go version

go version devel go1.22-27f02a1d25 Tue Dec 12 21:19:47 2023 -0800 darwin/amd64

What operating system and processor architecture are you using (go env)?

Not relevant. This is just a bug in the typechecker.

What did you do?

Compiled the following program (x.go) with: go tool compile -lang=go1.21.

package main

func main() {
	for range 10 {
	}
}

What did you expect to see?

An error: range over integers is only permitted with go1.22 and up.

What did you see instead?

No error.

[gopherbot]

Change https://go.dev/cl/549459 mentions this issue: go/types, types2: report error for range over int if Go version < 1.22