mirror of
https://github.com/golang/go
synced 2024-11-14 23:40:35 -07:00
38 lines
707 B
Go
38 lines
707 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2018 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
|
||
|
|
|
||
|
|
import (
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
type T struct{}
|
||
|
|
|
||
|
|
const maxInt = int(^uint(0) >> 1)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
s := make([]T, maxInt)
|
||
|
|
shouldPanic("cap out of range", func() { s = append(s, T{}) })
|
||
|
|
var oneElem = make([]T, 1)
|
||
|
|
shouldPanic("cap out of range", func() { s = append(s, oneElem...) })
|
||
|
|
}
|
||
|
|
|
||
|
|
func shouldPanic(str string, f func()) {
|
||
|
|
defer func() {
|
||
|
|
err := recover()
|
||
|
|
if err == nil {
|
||
|
|
panic("did not panic")
|
||
|
|
}
|
||
|
|
s := err.(error).Error()
|
||
|
|
if !strings.Contains(s, str) {
|
||
|
|
panic("got panic " + s + ", want " + str)
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
|
||
|
|
f()
|
||
|
|
}
|