Do not return context tuples on optimized eval

Author: josevalim

lib/elixir/src/elixir.erl

@@ -252,7 +252,7 @@ eval_forms(Tree, RawBinding, OE) ->
 
   case Erl of
     {atom, _, Atom} ->
-      {Atom, Binding, NewE};
+      {Atom, RawBinding, NewE};
 
     _  ->
       Exprs =

lib/elixir/test/elixir/code_test.exs

@@ -167,6 +167,10 @@ defmodule CodeTest do
       assert Code.eval_string("two = 1 + 1") == {2, [two: 2]}
     end
 
+    test "keeps bindings on optimized evals" do
+      assert Code.eval_string("import Enum", x: 1) == {Enum, [x: 1]}
+    end
+
     test "supports a %Macro.Env{} struct as the third argument" do
       assert {3, _} = Code.eval_string("a + b", [a: 1, b: 2], __ENV__)
     end