Make sure locals tracker can be stopped

Author: José Valim

lib/elixir/src/elixir_locals.erl

@@ -10,15 +10,22 @@
 
 -include("elixir.hrl").
 -define(cache, {elixir, cache_env}).
+-define(locals, {elixir, locals}).
 -define(tracker, 'Elixir.Module.LocalsTracker').
 
 setup({DataSet, _DataBag}) ->
   ets:insert(DataSet, {?cache, 0, nil}),
-  ok.
 
-stop({_DataSet, _DataBag}) ->
+  case elixir_config:get(bootstrap) of
+    false -> ets:insert(DataSet, {?locals, true});
+    true -> ok
+  end,
+
   ok.
 
+stop({DataSet, _DataBag}) ->
+  ets:delete(DataSet, ?locals).
+
 yank(Tuple, Module) ->
   if_tracker(Module, fun(Tracker) -> ?tracker:yank(Tracker, Tuple) end).
 
@@ -44,9 +51,12 @@ if_tracker(Module, Callback) ->
   if_tracker(Module, ok, Callback).
 
 if_tracker(Module, Default, Callback) ->
-  try {elixir_config:get(bootstrap), elixir_module:data_tables(Module)} of
-    {true, _Tracker} -> Default;
-    {false, Tracker} -> Callback(Tracker)
+  try
+    {DataSet, _} = Tables = elixir_module:data_tables(Module),
+    {ets:member(DataSet, ?locals), Tables}
+  of
+    {true, Tracker} -> Callback(Tracker);
+    {false, _} -> Default
   catch
     error:badarg -> Default
   end.