1// run
2
3// Copyright 2023 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7// The gofrontend used to mishandle this code due to a pass ordering issue.
8// It was inconsistent as to whether unsafe.Sizeof(byte(0)) was a constant,
9// and therefore as to whether it was a direct-iface type.
10
11package main
12
13import "unsafe"
14
15type A [unsafe.Sizeof(byte(0))]*byte
16
17func (r A) V() byte {
18	return *r[0]
19}
20
21func F() byte {
22	panic("F") // should never be called
23}
24
25type B [unsafe.Sizeof(F())]*byte
26
27func (r B) V() byte {
28	return *r[0]
29}
30
31func main() {
32	b := byte(1)
33	v := A{&b}.V() + B{&b}.V()
34	if v != 2 {
35		panic(v)
36	}
37}
38