Please answer these questions before submitting your issue. Thanks! ### What version of Go are you using (`go version`)? go version go1.10.1 darwin/amd64 ### Does this issue reproduce with the latest release? yes ### What operating system and processor architecture are you using (`go env`)? GOARCH="amd64" GOOS="darwin" ### What did you do? https://play.golang.org/p/gr5cHhrpmbK ### What did you expect to see? shown in previous link ### What did you see instead? shown in previous link