The compiler and go/types disagree about the offset of y in

var s struct {
    x *int
    y []byte
}

on amd64p32. I am using sizes types.StdSizes{WordSize: 4, MaxAlign: 8}. The compiler says y's offset is 4; go/types says it is 8. I think the compiler is right, insofar as code relying on this runs and works on nacl.

https://play.golang.org/p/VbR2IIeyUt calculates and displays the offsets of x and y via unsafe and via go/types. Since the playground runs amd64p32, you can see the results directly by hitting Run. I also confirmed with nacl/amd64p32 locally.

Found while working on #11041. I'm happy to look into a fix, but I'd like confirmation first that the correct answer is 4.

cc @griesemer