/usr/share/go-1.8/test/fixedbugs/bug255.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 | // errorcheck
// Copyright 2010 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.
package main
var a [10]int // ok
var b [1e1]int // ok
var c [1.5]int // ERROR "truncated"
var d ["abc"]int // ERROR "invalid array bound|not numeric"
var e [nil]int // ERROR "use of untyped nil|invalid array bound|not numeric"
var f [e]int // ERROR "invalid array bound|not constant"
var g [1 << 65]int // ERROR "array bound is too large|overflows"
var h [len(a)]int // ok
func ff() string
var i [len([1]string{ff()})]int // ERROR "non-constant array bound|not constant"
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