@@ -232,6 +232,11 @@ func parseString(rest string) (*Node, map[string]bool, error) {

 // parseJSON converts JSON arrays to an AST.

 func parseJSON(rest string) (*Node, map[string]bool, error) {

+	rest = strings.TrimLeftFunc(rest, unicode.IsSpace)

+	if !strings.HasPrefix(rest, "[") {

+		return nil, nil, fmt.Errorf("Error parsing \"%s\" as a JSON array", rest)

+	}

+

 	var myJSON []interface{}

 	if err := json.NewDecoder(strings.NewReader(rest)).Decode(&myJSON); err != nil {

 		return nil, nil, err

@@ -3,6 +3,8 @@ MAINTAINER	Seongyeol Lim <seongyeol37@gmail.com>

 COPY	.	/go/src/github.com/docker/docker

 ADD		.	/

+ADD		null /

+COPY	nullfile /tmp

 ADD		[ "vimrc", "/tmp" ]

 COPY	[ "bashrc", "/tmp" ]

 COPY	[ "test file", "/tmp" ]

@@ -2,6 +2,8 @@

 (maintainer "Seongyeol Lim <seongyeol37@gmail.com>")

 (copy "." "/go/src/github.com/docker/docker")

 (add "." "/")

+(add "null" "/")

+(copy "nullfile" "/tmp")

 (add "vimrc" "/tmp")

 (copy "bashrc" "/tmp")

 (copy "test file" "/tmp")