1// run
2
3// Copyright 2018 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
7package main
8
9func main() {
10	x := []byte{'a'}
11	switch string(x) {
12	case func() string { x[0] = 'b'; return "b" }():
13		panic("FAIL")
14	}
15}
16