go/test/fixedbugs/bug428.go

// run

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test that when the compiler expands append inline it does not
// overwrite a value before it needs it (issue 3369).

package main

func main() {
	s := make([]byte, 5, 6)
	copy(s, "12346")
	s = append(s[:len(s)-1], '5', s[len(s)-1])
	if string(s) != "123456" {
		panic(s)
	}
}