### What version of Go are you using (`go version`)? ``` 1.9 go get -u golang.org/x/text/ ``` ### What did you do? ```go package main import ( "fmt" "log" "unicode/utf8" "golang.org/x/text/encoding/traditionalchinese" ) func main() { str := "包" b, err := traditionalchinese.Big5.NewEncoder().Bytes([]byte(str)) if err != nil { log.Fatalln(err) } r, _ := utf8.DecodeRuneInString(str) fmt.Printf("unicode:0x%X big5:0x%X\n", r, b) //incorrect } ``` ### What did you expect to see? ``` unicode:0x5305 big5:0xA55D ``` ### What did you see instead? ``` unicode:0x5305 big5:0xFABD ``` reference: http://moztw.org/docs/big5/table/cp950-u2b.txt http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP950.TXT https://encoding.spec.whatwg.org/index-big5.txt @mpvl