--- a/src/th06/anm0.rs
+++ b/src/th06/anm0.rs
@@ -70,11 +70,8 @@ pub struct Anm0 {
 
 impl Anm0 {
     /// Parse a slice of bytes into an `Anm0` struct.
-    pub fn from_slice(data: &[u8]) -> Result<Anm0, ()> {
-        // XXX: report the exact nom error instead!
-        let (_, anm0) = parse_anm0(data).or_else(|_| Err(()))?;
-        assert_eq!(anm0.len(), 1);
-        Ok(anm0[0].clone())
+    pub fn from_slice(data: &[u8]) -> IResult<&[u8], Vec<Anm0>> {
+        parse_anm0(data)
     }
 
     /// TODO
@@ -318,7 +315,9 @@ mod tests {
         let mut file = io::BufReader::new(file);
         let mut buf = vec![];
         file.read_to_end(&mut buf).unwrap();
-        let anm0 = Anm0::from_slice(&buf).unwrap();
+        let (_, mut anms) = Anm0::from_slice(&buf).unwrap();
+        assert_eq!(anms.len(), 1);
+        let anm0 = anms.pop().unwrap();
         assert_eq!(anm0.size, (256, 256));
         assert_eq!(anm0.format, 5);
     }