Do not warn for attributes used in after_compile

Closes #10579.

Author: josevalim

lib/elixir/src/elixir_module.erl

@@ -139,9 +139,9 @@ compile(Line, Module, Block, Vars, E) ->
     },
 
     Binary = elixir_erl:compile(ModuleMap),
-    warn_unused_attributes(File, DataSet, DataBag, PersistedAttributes),
     autoload_module(Module, Binary, CompileOpts, NE),
     eval_callbacks(Line, DataBag, after_compile, [NE, Binary], NE),
+    warn_unused_attributes(File, DataSet, DataBag, PersistedAttributes),
     make_module_available(Module, Binary, ModuleMap),
     {module, Module, Binary, Result}
   catch

lib/elixir/test/elixir/module_test.exs

@@ -95,17 +95,16 @@ defmodule ModuleTest do
   end
 
   test "supports read access to module from __after_compile__/2" do
-    contents =
-      quote do
-        @after_compile __MODULE__
-        @foo 42
+    defmodule ModuleTest.NoRaise do
+      @after_compile __MODULE__
+      @foo 42
 
-        def __after_compile__(%Macro.Env{module: module}, bin) when is_binary(bin) do
-          Module.get_attribute(module, :foo)
-        end
+      def __after_compile__(%Macro.Env{module: module}, bin) when is_binary(bin) do
+        send(self(), Module.get_attribute(module, :foo))
       end
+    end
 
-    Module.create(ModuleTest.NoRaise, contents, __ENV__)
+    assert_received 42
   end
 
   test "in memory modules are tagged as so" do