go issue29190 源码
golang issue29190 代码
文件路径：/test/fixedbugs/issue29190.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()
}
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