net: disable IPv6 multicast tests unless external IPv6 connection is present

R=rsc
CC=golang-dev
https://golang.org/cl/6398052

diff --git a/src/pkg/net/multicast_test.go b/src/pkg/net/multicast_test.go
index 2c61dca549f730e743123752508bff5fbb363007..be6003fd7251bf4f6c70bcce784fc64adad0c2c8 100644 (file)
--- a/src/pkg/net/multicast_test.go
+++ b/src/pkg/net/multicast_test.go
@@ -59,7 +59,7 @@ func TestMulticastListener(t *testing.T) {
        }
 
        for _, tt := range multicastListenerTests {
-               if tt.ipv6 && (!supportsIPv6 || os.Getuid() != 0) {
+               if tt.ipv6 && (!*testIPv6 || !supportsIPv6 || os.Getuid() != 0) {
                        continue
                }
                ifi, err := availMulticastInterface(t, tt.flags)