Fix: option_test data race (#315)

url/option_test.go

@@ -19,18 +19,23 @@ func TestUrl_Handle(t *testing.T) {
 		"mux=false;listen=127.0.0.1:0",
 		"mux=false;listen=127.0.0.1:0;api=127.0.0.1:0",
 	}
+
 	for _, s := range urlCases {
 		for _, option := range optionCases {
+			s := s
+			option := option
 			u := &url{
 				url:    &s,
 				option: &option,
 			}
 			u.Name()
 			u.Priority()
+
 			errChan := make(chan error, 1)
 			go func() {
 				errChan <- u.Handle()
 			}()
+
 			select {
 			case err := <-errChan:
 				t.Fatal(err)