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authorOndřej Surý <ondrej@sury.org>2011-09-13 13:13:40 +0200
committerOndřej Surý <ondrej@sury.org>2011-09-13 13:13:40 +0200
commit5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch)
treec0650497e988f47be9c6f2324fa692a52dea82e1 /test/chan/select6.go
parent80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff)
downloadgolang-upstream/60.tar.gz
Imported Upstream version 60upstream/60
Diffstat (limited to 'test/chan/select6.go')
-rw-r--r--test/chan/select6.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/chan/select6.go b/test/chan/select6.go
new file mode 100644
index 000000000..2ba6810ac
--- /dev/null
+++ b/test/chan/select6.go
@@ -0,0 +1,34 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// 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.
+
+// Issue 2075
+// A bug in select corrupts channel queues of failed cases
+// if there are multiple waiters on those channels and the
+// select is the last in the queue. If further waits are made
+// on the channel without draining it first then those waiters
+// will never wake up. In the code below c1 is such a channel.
+
+package main
+
+func main() {
+ c1 := make(chan bool)
+ c2 := make(chan bool)
+ c3 := make(chan bool)
+ go func() { <-c1 }()
+ go func() {
+ select {
+ case <-c1:
+ panic("dummy")
+ case <-c2:
+ c3 <- true
+ }
+ <-c1
+ }()
+ go func() { c2 <- true }()
+ <-c3
+ c1 <- true
+ c1 <- true
+}