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1b3244e0db
Ordinary variable load was assumed to be not worth saving, but not if one of the function calls later might change its value. Fixes #4313. R=ken2 CC=golang-dev https://golang.org/cl/6997047
29 lines
547 B
Go
29 lines
547 B
Go
// run
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// Copyright 2012 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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// Order of operations in select.
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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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x := 0
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select {
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case c <- x: // should see x = 0, not x = 42 (after makec)
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case <-makec(&x): // should be evaluated only after c and x on previous line
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}
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y := <-c
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if y != 0 {
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panic(y)
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}
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}
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func makec(px *int) chan bool {
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if false { for {} }
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*px = 42
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return make(chan bool, 0)
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}
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