/usr/share/go-1.8/test/fixedbugs/issue4099.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | // errorcheck -0 -m
// Copyright 2013 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.
// Check go:noescape annotations.
package p
// The noescape comment only applies to the next func,
// which must not have a body.
//go:noescape
func F1([]byte)
func F2([]byte)
func G() {
var buf1 [10]byte
F1(buf1[:]) // ERROR "buf1 does not escape"
var buf2 [10]byte // ERROR "moved to heap: buf2"
F2(buf2[:]) // ERROR "buf2 escapes to heap"
}
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