Fix on_load handling in modules loaded by code:load_binary/3

In "13.4 Running a function when a module is loaded" in the
Reference Manual, it is said that:

   A process that calls any function in a module whose on_load
   function has not yet returned will be suspended until the
   on_load function has returned.

That did not work if the module was loaded using code:load_binary/3.
Instead, the callers would get an 'undef' exception.

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index 32a12e2b52..5d4f2eb70c 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -1317,15 +1317,21 @@ int_list([H|T]) when is_integer(H) -> int_list(T);
 int_list([_|_])                    -> false;
 int_list([])                       -> true.
 
+load_file(Mod0, {From,_}=Caller, St0) ->
+    Mod = to_atom(Mod0),
+    case pending_on_load(Mod, From, St0) of
+	no -> load_file_1(Mod, Caller, St0);
+	{yes,St} -> {noreply,St}
+    end.
 
-load_file(Mod, Caller, #state{path=Path,cache=no_cache}=St) ->
+load_file_1(Mod, Caller, #state{path=Path,cache=no_cache}=St) ->
     case mod_to_bin(Path, Mod) of
 	error ->
 	    {reply,{error,nofile},St};
 	{Mod,Binary,File} ->
 	    try_load_module(File, Mod, Binary, Caller, St)
     end;
-load_file(Mod, Caller, #state{cache=Cache}=St0) ->
+load_file_1(Mod, Caller, #state{cache=Cache}=St0) ->
     Key = {obj,Mod},
     case ets:lookup(Cache, Key) of
 	[] ->