1// run
2
3// Copyright 2011 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
7package main
8
9func main() {
10	c := make(chan int, 1)
11	dummy := make(chan int)
12	v := 0x12345678
13	for i := 0; i < 10; i++ {
14		// 6g had a bug that caused select to pass &t to
15		// selectrecv before allocating the memory for t,
16		// which caused non-deterministic crashes.
17		// This test looks for the bug by checking that the
18		// value received actually ends up in t.
19		// If the allocation happens after storing through
20		// whatever garbage &t holds, the later reference
21		// to t in the case body will use the new pointer and
22		// not see the received value.
23		v += 0x1020304
24		c <- v
25		select {
26		case t := <-c:
27			go func() {
28				f(t)
29			}()
30			escape(&t)
31			if t != v {
32				println(i, v, t)
33				panic("wrong values")
34			}
35		case dummy <- 1:
36		}
37	}
38}
39
40func escape(*int) {
41}
42
43func f(int) {
44}
45
46