Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/test/fixedbugs/issue4313.go b/test/fixedbugs/issue4313.go
new file mode 100644
index 0000000..2494b83
--- /dev/null
+++ b/test/fixedbugs/issue4313.go
@@ -0,0 +1,28 @@
+// run
+
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Order of operations in select.
+
+package main
+
+func main() {
+	c := make(chan int, 1)
+	x := 0
+	select {
+	case c <- x: // should see x = 0, not x = 42 (after makec)
+	case <-makec(&x): // should be evaluated only after c and x on previous line
+	}
+	y := <-c
+	if y != 0 {
+		panic(y)
+	}
+}
+
+func makec(px *int) chan bool {
+	if false { for {} }
+	*px = 42
+	return make(chan bool, 0)
+}