| Please answer these questions before submitting your issue. Thanks! | |
| ### What version of Go are you using (`go version`)? | |
| ### What operating system and processor architecture are you using (`go env`)? | |
| ### What did you do? | |
| If possible, provide a recipe for reproducing the error. | |
| A complete runnable program is good. | |
| A link on play.golang.org is best. | |
| ### What did you expect to see? | |
| ### What did you see instead? | |