Possible compiler bug for a literal slice type in an if statement

compiler_output.txt

$ 6g slice.go && sl -o slice slice.6
slice.go:11: syntax error: unexpected }, expecting := or = or comma
$ 6g -V
6g version weekly.2011-07-07 9100+

slicetype.go

package main

type Slice []int

func main() {
	a := Slice{1,2} // ok
	if got := a; true { // ok
	}

	got := Slice{1,2} // ok
	if got := Slice{1,2}; true { // bad
	}
}