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go/test/fixedbugs/issue8039.go

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cmd/gc: fix defer copy(x, <-c) In the first very rough draft of the reordering code that was introduced in the Go 1.3 cycle, the pre-allocated temporary for a ... argument was held in n->right. It moved to n->alloc but the code avoiding n->right was left behind in order.c. In copy(x, <-c), the receive is in n->right and must be processed. Delete the special case code, removing the bug. Fixes #8039. LGTM=iant R=golang-codereviews, iant CC=golang-codereviews https://golang.org/cl/100820044
2014-05-27 21:59:06 -06:00
// run
all: make copyright headers consistent with one space after period Follows suit with https://go-review.googlesource.com/#/c/20111. Generated by running $ grep -R 'Go Authors. All' * | cut -d":" -f1 | while read F;do perl -pi -e 's/Go Authors. All/Go Authors. All/g' $F;done The code in cmd/internal/unvendor wasn't changed. Fixes #15213 Change-Id: I4f235cee0a62ec435f9e8540a1ec08ae03b1a75f Reviewed-on: https://go-review.googlesource.com/21819 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-10 15:32:26 -06:00
// Copyright 2014 The Go Authors. All rights reserved.
cmd/gc: fix defer copy(x, <-c) In the first very rough draft of the reordering code that was introduced in the Go 1.3 cycle, the pre-allocated temporary for a ... argument was held in n->right. It moved to n->alloc but the code avoiding n->right was left behind in order.c. In copy(x, <-c), the receive is in n->right and must be processed. Delete the special case code, removing the bug. Fixes #8039. LGTM=iant R=golang-codereviews, iant CC=golang-codereviews https://golang.org/cl/100820044
2014-05-27 21:59:06 -06:00
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// issue 8039. defer copy(x, <-c) did not rewrite <-c properly.
package main
func f(s []int) {
c := make(chan []int, 1)
c <- []int{1}
defer copy(s, <-c)
}
func main() {
x := make([]int, 1)
f(x)
if x[0] != 1 {
println("BUG", x[0])
}
}
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