Please answer these questions before submitting your issue. Thanks! ### What version of Go are you using (`go version`)? ### Does this issue reproduce with the latest release? ### 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?