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-rw-r--r--test/fixedbugs/bug320.go45
1 files changed, 45 insertions, 0 deletions
diff --git a/test/fixedbugs/bug320.go b/test/fixedbugs/bug320.go
new file mode 100644
index 0000000..0406b96
--- /dev/null
+++ b/test/fixedbugs/bug320.go
@@ -0,0 +1,45 @@
+// run
+
+// Copyright 2011 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.
+
+package main
+
+func main() {
+ c := make(chan int, 1)
+ dummy := make(chan int)
+ v := 0x12345678
+ for i := 0; i < 10; i++ {
+ // 6g had a bug that caused select to pass &t to
+ // selectrecv before allocating the memory for t,
+ // which caused non-deterministic crashes.
+ // This test looks for the bug by checking that the
+ // value received actually ends up in t.
+ // If the allocation happens after storing through
+ // whatever garbage &t holds, the later reference
+ // to t in the case body will use the new pointer and
+ // not see the received value.
+ v += 0x1020304
+ c <- v
+ select {
+ case t := <-c:
+ go func() {
+ f(t)
+ }()
+ escape(&t)
+ if t != v {
+ println(i, v, t)
+ panic("wrong values")
+ }
+ case dummy <- 1:
+ }
+ }
+}
+
+func escape(*int) {
+}
+
+func f(int) {
+}
+