fix vec of type with buf (paradigmxyz#727)

crates/storage/codecs/src/lib.rs

@@ -104,7 +104,9 @@ where
             let mut element = T::default();
 
             let len = buf.get_u16();
-            (element, buf) = T::from_compact(buf, len as usize);
+
+            (element, _) = T::from_compact(&buf[..(len as usize)], len as usize);
+            buf.advance(len as usize);
 
             list.push(element);
         }
@@ -161,7 +163,9 @@ where
         }
 
         let len = buf.get_u16();
-        let (element, buf) = T::from_compact(buf, len as usize);
+
+        let (element, _) = T::from_compact(&buf[..(len as usize)], len as usize);
+        buf.advance(len as usize);
 
         (Some(element), buf)
     }

crates/storage/db/src/tables/models/blocks.rs

@@ -128,6 +128,8 @@ impl_fixed_arbitrary!(BlockNumHash, 40);
 
 #[cfg(test)]
 mod test {
+    use crate::table::{Compress, Decompress};
+
     use super::*;
     use rand::{thread_rng, Rng};
 
@@ -155,4 +157,15 @@ mod test {
         let key = BlockNumHash::arbitrary(&mut Unstructured::new(&bytes)).unwrap();
         assert_eq!(bytes, Encode::encode(key));
     }
+
+    #[test]
+    fn test_ommer() {
+        let mut ommer = StoredBlockOmmers::default();
+        ommer.ommers.push(Header::default());
+        ommer.ommers.push(Header::default());
+        assert!(
+            ommer.clone() ==
+                StoredBlockOmmers::decompress::<Vec<_>>(ommer.compress().into()).unwrap()
+        );
+    }
 }