* parse.y (rb_str_dynamic_intern): set mark bit if dynamic symbol

  is before sweeping.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Author: k-tsj

ChangeLog

@@ -1,3 +1,8 @@
+Tue Apr  1 08:58:39 2014  Kazuki Tsujimoto  <[email protected]>
+
+	* parse.y (rb_str_dynamic_intern): set mark bit if dynamic symbol
+	  is before sweeping.
+
 Tue Apr  1 07:37:00 2014  NARUSE, Yui  <[email protected]>
 
 	* addr2line.c (fill_lines): use dynsym, which is used for dynamic

parse.y

@@ -10705,7 +10705,13 @@ rb_str_dynamic_intern(VALUE str)
     ID id, type;
 
     if (st_lookup(global_symbols.sym_id, str, &id)) {
-	return ID2SYM(id);
+	VALUE sym = ID2SYM(id);
+	if (!STATIC_SYM_P(sym)) {
+	    /* because of lazy sweep, dynamic symbol may be unmarked already and swept
+	     * at next time */
+	    rb_gc_resurrect(sym);
+	}
+	return sym;
     }
 
     enc = rb_enc_get(str);