mirror of
https://github.com/golang/go
synced 2024-11-24 16:40:15 -07:00
48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
|
// 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$" "main ... argument does not escape$"
|
||
|
|
}
|