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      1 // run
      2 
      3 // Copyright 2010 The Go Authors. All rights reserved.
      4 // Use of this source code is governed by a BSD-style
      5 // license that can be found in the LICENSE file.
      6 
      7 // https://golang.org/issue/589
      8 
      9 package main
     10 
     11 var bug = false
     12 
     13 var minus1 = -1
     14 var five = 5
     15 var big int64 = 10 | 1<<32
     16 
     17 type block [1<<19]byte
     18 
     19 var g1 []block
     20 
     21 func shouldfail(f func(), desc string) {
     22 	defer func() { recover() }()
     23 	f()
     24 	if !bug {
     25 		println("BUG")
     26 		bug = true
     27 	}
     28 	println("didn't crash: ", desc)
     29 }
     30 
     31 func badlen() {
     32 	g1 = make([]block, minus1)
     33 }
     34 
     35 func biglen() {
     36 	g1 = make([]block, big)
     37 }
     38 
     39 func badcap() {
     40 	g1 = make([]block, 10, minus1)
     41 }
     42 
     43 func badcap1() {
     44 	g1 = make([]block, 10, five)
     45 }
     46 
     47 func bigcap() {
     48 	g1 = make([]block, 10, big)
     49 }
     50 
     51 type cblock [1<<16-1]byte
     52 
     53 var g4 chan cblock
     54 func badchancap() {
     55 	g4 = make(chan cblock, minus1)
     56 }
     57 
     58 func bigchancap() {
     59 	g4 = make(chan cblock, big)
     60 }
     61 
     62 func overflowchan() {
     63 	g4 = make(chan cblock, 1<<30)
     64 }
     65 
     66 func main() {
     67 	shouldfail(badlen, "badlen")
     68 	shouldfail(biglen, "biglen")
     69 	shouldfail(badcap, "badcap")
     70 	shouldfail(badcap1, "badcap1")
     71 	shouldfail(bigcap, "bigcap")
     72 	shouldfail(badchancap, "badchancap")
     73 	shouldfail(bigchancap, "bigchancap")
     74 	shouldfail(overflowchan, "overflowchan")
     75 }
     76