runtime: fix panic for make(chan [0]byte).

I suspect that this was introduced by
http://code.google.com/p/go/source/detail?r=6e4ee32fffd1

R=r
CC=golang-dev
http://codereview.appspot.com/4764045

1 files changed, 16 insertions, 0 deletions

diff --git a/test/chan/zerosize.go b/test/chan/zerosize.go
new file mode 100644
index 000000000..617c9dab3
--- /dev/null
+++ b/test/chan/zerosize.go
@@ -0,0 +1,16 @@
+// $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.
+
+// Making channels of a zero-sized type should not panic.
+
+package main
+
+func main() {
+	_ = make(chan [0]byte)
+	_ = make(chan [0]byte, 1)
+	_ = make(chan struct{})
+	_ = make(chan struct{}, 1)
+}