nobu	2016-02-24 11:42:40 +0900 (Wed, 24 Feb 2016)

  New Revision: 53912

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=53912

  Log:
    parse.y: hide compile_option
    
    * parse.y (parser_set_compile_option_flag): hide compile_option
      hash from ObjectSpace.

  Modified files:
    trunk/parse.y
Index: parse.y
===================================================================
--- parse.y	(revision 53911)
+++ parse.y	(revision 53912)
@@ -7093,7 +7093,7 @@ parser_set_compile_option_flag(struct pa https://github.com/ruby/ruby/blob/trunk/parse.y#L7093
     if (b < 0) return;
 
     if (!parser->compile_option)
-	parser->compile_option = rb_ident_hash_new();
+	parser->compile_option = rb_obj_hide(rb_ident_hash_new());
     rb_hash_aset(parser->compile_option, ID2SYM(rb_intern(name)),
 		 (b ? Qtrue : Qfalse));
 }

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