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// run
// Copyright 2013 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"
"unsafe"
)
type T []int
func main() {
n := -1
shouldPanic("len out of range", func() { _ = make(T, n) })
shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
var t *byte
if unsafe.Sizeof(t) == 8 {
n = 1 << 20
n <<= 20
shouldPanic("len out of range", func() { _ = make(T, n) })
shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
n <<= 20
shouldPanic("len out of range", func() { _ = make(T, n) })
shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
} else {
n = 1<<31 - 1
shouldPanic("len out of range", func() { _ = make(T, n) })
shouldPanic("cap out of range", func() { _ = make(T, 0, n) })
shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
}
}
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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