fix: oob(!!) in CCHash.bytes

src/core/CCHash.ml

@@ -101,7 +101,7 @@ let max_len_b_ = 128
 
 let bytes (x : bytes) =
   let h = ref fnv_offset_basis in
-  for i = 0 to min max_len_b_ (Bytes.length x) do
+  for i = 0 to min max_len_b_ (Bytes.length x-1) do
     (h := Int64.(mul !h fnv_prime));
     let byte = Char.code (Bytes.unsafe_get x i) in
     h := Int64.(logxor !h (of_int byte))

tests/core/t_hash.ml

@@ -11,6 +11,8 @@ t @@ fun () -> char 'c' >= 0;;
 t @@ fun () -> int 152352 = int 152352;;
 t @@ fun () -> list_comm int [ 1; 2 ] = list_comm int [ 2; 1 ];;
 t @@ fun () -> list_comm int [ 1; 2 ] <> list_comm int [ 2; 3 ];;
+t @@ fun () -> string "abcd" >= 0;;
+t @@ fun () -> string "abc" <> string "abcd";;
 
 q Q.int (fun i ->
     Q.assume (i >= 0);