Use Bytes instead of String for mutable byte array.

diff --git a/goaljobs.ml b/goaljobs.ml
index 208882c..26d078d 100644 (file)
--- a/goaljobs.ml
+++ b/goaljobs.ml
@@ -246,9 +246,10 @@ let url_contains_string url str =
 (* Create a temporary directory.  It is *not* deleted on exit. *)
 let make_tmpdir () =
   let chan = open_in "/dev/urandom" in
-  let data = String.create 16 in
-  really_input chan data 0 (String.length data);
+  let data = Bytes.create 16 in
+  really_input chan data 0 (Bytes.length data);
   close_in chan;
+  let data = Bytes.to_string data in
   let data = Digest.to_hex (Digest.string data) in
   let dir = Filename.temp_dir_name // sprintf "goaljobstmp%s" data in
   mkdir dir 0o700;