lcr.mu.Lock()
		lcr.dialed = true
		lcr.mu.Unlock()
		return Dial(network, address)
	}
}

// TestConcurrentPreferGoResolversDial tests that multiple resolvers with the
// PreferGo option used concurrently are all dialed properly.
func TestConcurrentPreferGoResolversDial(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		// TODO: plan9 implementation of the resolver uses the Dial function since