net: disable ipv6 test if we know kernel won't take it.

R=agl, agl1
CC=golang-dev
http://codereview.appspot.com/153048

1 files changed, 5 insertions, 1 deletions

diff --git a/src/pkg/net/dialgoogle_test.go b/src/pkg/net/dialgoogle_test.go
index 8d8848b04..192540f66 100644
--- a/src/pkg/net/dialgoogle_test.go
+++ b/src/pkg/net/dialgoogle_test.go
@@ -80,6 +80,10 @@ func TestDialGoogle(t *testing.T) {
 				preferIPv4 = false;
 			}
 		}
-		doDial(t, "tcp6", addr);
+
+		// Only run tcp6 if the kernel will take it.
+		if kernelSupportsIPv6() {
+			doDial(t, "tcp6", addr)
+		}
 	}
 }