Given the program (test.go):

package main
import "fmt"
func main() {
    fmt.Printf("%0*d\n", 5, 99)
}

: govet test.go 
test.go:4:5: wrong number of formatting directives in Printf call: 1 percent(s) for 2
args

This is clearly wrong since the format statement _requires_ 2 args.

: hg identify
c5c62aeb6267+ release/release.2011-03-07.1