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// run
// Copyright 2010 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.
// https://golang.org/issue/589
package main
import "unsafe"
var bug = false
var minus1 = -1
var five = 5
var big int64 = 10 | 1<<46
type block [1 << 19]byte
var g1 []block
func shouldfail(f func(), desc string) {
defer func() { recover() }()
f()
if !bug {
println("BUG")
bug = true
}
println("didn't crash: ", desc)
}
func badlen() {
g1 = make([]block, minus1)
}
func biglen() {
g1 = make([]block, big)
}
func badcap() {
g1 = make([]block, 10, minus1)
}
func badcap1() {
g1 = make([]block, 10, five)
}
func bigcap() {
g1 = make([]block, 10, big)
}
type cblock [1<<16 - 1]byte
var g4 chan cblock
func badchancap() {
g4 = make(chan cblock, minus1)
}
func bigchancap() {
g4 = make(chan cblock, big)
}
func overflowchan() {
const ptrSize = unsafe.Sizeof(uintptr(0))
g4 = make(chan cblock, 1<<(30*(ptrSize/4)))
}
func main() {
shouldfail(badlen, "badlen")
shouldfail(biglen, "biglen")
shouldfail(badcap, "badcap")
shouldfail(badcap1, "badcap1")
shouldfail(bigcap, "bigcap")
shouldfail(badchancap, "badchancap")
shouldfail(bigchancap, "bigchancap")
shouldfail(overflowchan, "overflowchan")
}
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