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8a2891fc56
Affects receive using := when new variable escapes to heap. Fixes #1468. R=ken2 CC=golang-dev https://golang.org/cl/4119052
46 lines
996 B
Go
46 lines
996 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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func main() {
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c := make(chan int, 1)
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dummy := make(chan int)
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v := 0x12345678
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for i := 0; i < 10; i++ {
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// 6g had a bug that caused select to pass &t to
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// selectrecv before allocating the memory for t,
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// which caused non-deterministic crashes.
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// This test looks for the bug by checking that the
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// value received actually ends up in t.
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// If the allocation happens after storing through
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// whatever garbage &t holds, the later reference
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// to t in the case body will use the new pointer and
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// not see the received value.
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v += 0x1020304
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c <- v
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select {
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case t := <-c:
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go func() {
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f(t)
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}()
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escape(&t)
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if t != v {
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println(i, v, t)
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panic("wrong values")
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}
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case dummy <- 1:
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}
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}
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}
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func escape(*int) {
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}
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func f(int) {
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}
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