Generate: explicit initialization

compiler/bin-js_of_ocaml/check_runtime.ml

@@ -43,6 +43,7 @@ let print_groups output l =
               output_string output (Printf.sprintf "%s\n" name)))
 
 let f (runtime_files, bytecode, target_env) =
+  Generate.init ();
   let runtime_files, builtin =
     List.partition_map runtime_files ~f:(fun name ->
         match Builtins.find name with

compiler/bin-js_of_ocaml/compile.ml

@@ -91,6 +91,7 @@ let run
   let include_cmis = toplevel && not no_cmis in
   let custom_header = common.Jsoo_cmdline.Arg.custom_header in
   Jsoo_cmdline.Arg.eval common;
+  Generate.init ();
   (match output_file with
   | `Stdout, _ -> ()
   | `Name name, _ when debug_mem () -> Debug.start_profiling name

compiler/lib/generate.ml

@@ -2056,5 +2056,3 @@ let init () =
   Hashtbl.iter
     (fun name (k, _) -> Primitive.register name k None None)
     internal_primitives
-
-let () = init ()

compiler/lib/primitive.ml

@@ -98,17 +98,17 @@ let register p k kargs arity =
         (string_of_kind k));
   add_external p;
   (match arity with
-  | Some a -> Hashtbl.add arities p a
+  | Some a -> Hashtbl.replace arities p a
   | _ -> ());
   (match kargs with
-  | Some k -> Hashtbl.add kind_args_tbl p k
+  | Some k -> Hashtbl.replace kind_args_tbl p k
   | _ -> ());
-  Hashtbl.add kinds p k
+  Hashtbl.replace kinds p k
 
 let alias nm nm' =
   add_external nm';
   add_external nm;
-  Hashtbl.add aliases nm nm'
+  Hashtbl.replace aliases nm nm'
 
 let named_values = ref StringSet.empty