1// compile
2
3// Copyright 2024 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 p
8
9type Message struct {
10	Header map[string][]string
11}
12
13func f() {
14	m := Message{Header: map[string][]string{}}
15	m.Header[""] = append([]string(m.Header[""]), "")
16	_ = m
17}
18