Before filing a bug, please check whether it has been fixed since
the latest release: run "hg pull -u" and retry what you did to
reproduce the problem.  Thanks.

What steps will reproduce the problem?
Try to compile the following program:
----
package main

import "fmt"

func Byte() {
    num := 10.1
    fmt.Println(byte(num))
}
----

What is the expected output? What do you see instead?

The program should compile. Instead I get a compiler error message:

sample.go:7: reg: unknown op: TESTL

What is your $GOOS?  $GOARCH?

linux 386

Which revision are you using?  (hg identify)

b0524afd0d7c tip

Please provide any additional information below.

The same error occurs if byte is substituted with uint16, but not with
int8, int16, uint32, int32, uint or int.