/usr/share/go-1.8/test/fixedbugs/issue17318.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 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | // errorcheck -0 -N -m -l
// Copyright 2016 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.
// The escape analyzer needs to run till its root set settles
// (this is not that often, it turns out).
// This test is likely to become stale because the leak depends
// on a spurious-escape bug -- return an interface as a named
// output parameter appears to cause the called closure to escape,
// where returning it as a regular type does not.
package main
import (
"fmt"
)
type closure func(i, j int) ent
type ent int
func (e ent) String() string {
return fmt.Sprintf("%d", int(e)) // ERROR "ent.String ... argument does not escape$" "int\(e\) escapes to heap$"
}
//go:noinline
func foo(ops closure, j int) (err fmt.Stringer) { // ERROR "leaking param: ops$" "leaking param: ops to result err level=0$"
enqueue := func(i int) fmt.Stringer { // ERROR "func literal escapes to heap$"
return ops(i, j) // ERROR "ops\(i, j\) escapes to heap$"
}
err = enqueue(4)
if err != nil {
return err
}
return // return result of enqueue, a fmt.Stringer
}
func main() {
// 3 identical functions, to get different escape behavior.
f := func(i, j int) ent { // ERROR "func literal escapes to heap$"
return ent(i + j)
}
i := foo(f, 3).(ent)
fmt.Printf("foo(f,3)=%d\n", int(i)) // ERROR "int\(i\) escapes to heap$" "main ... argument does not escape$"
}
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