try making sure the connection closes in the SAM availability checker too

launch.go

@@ -300,5 +300,16 @@ func SAM() error {
 	} else {
 		tcp4.Write([]byte("sam.create\n"))
 	}
-	return nil
+	for i := 1; i < 10; i++ {
+		conn, err := net.Dial("tcp4", net.JoinHostPort(loopbackInterface(), "7656"))
+		if err != nil {
+			log.Println("Connecting error:", err)
+		}
+		if conn != nil {
+			conn.Close()
+			return nil
+		}
+		time.Sleep(time.Duration(i*10) * time.Second)
+	}
+	return fmt.Errorf("Error connecting to %s", "SAM port")
 }