Handle private AREF call in compile.c

Author: nobu

parse.y

@@ -4249,10 +4249,7 @@ method_call	: fcall paren_args
                 | primary_value '[' opt_call_args rbracket
                     {
                     /*%%%*/
-                        if ($1 && nd_type_p($1, NODE_SELF))
-                            $$ = NEW_FCALL(tAREF, $3, &@$);
-                        else
-                            $$ = NEW_CALL($1, tAREF, $3, &@$);
+                        $$ = NEW_CALL($1, tAREF, $3, &@$);
                         fixpos($$, $1);
                     /*% %*/
                     /*% ripper: aref!($1, escape_Qundef($3)) %*/

test/ruby/test_method.rb

@@ -771,6 +771,14 @@ def test_visibility
     assert_raise(NoMethodError) { (self).mv2 }
     assert_nothing_raised { self.mv3 }
 
+    class << (obj = Object.new)
+      private def [](x) x end
+      def mv1(x) self[x] end
+      def mv2(x) (self)[x] end
+    end
+    assert_nothing_raised { obj.mv1(0) }
+    assert_raise(NoMethodError) { obj.mv2(0) }
+
     v = Visibility.new
 
     assert_equal('method', defined?(v.mv1))