symbol.c (rb_intern_cstr_without_pindown): check dsymbol on return

This is not a complete fix for bug 10206, but seems to reduce
that crash and also looks correct.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47455 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Tue Sep  9 05:48:42 2014  Eric Wong  <e@80x24.org>
+
+	* symbol.c (rb_intern_cstr_without_pindown): check dsymbol on return
+	  This is not a complete fix for bug 10206, but seems to reduce
+	  that crash and also looks correct.
+
 Tue Sep  9 04:36:24 2014  Eric Wong  <e@80x24.org>
 
 	* vm_core.h (rb_env_t): use flexible array

symbol.c

@@ -525,6 +525,9 @@ rb_intern_cstr_without_pindown(const char *name, long len, rb_encoding *enc)
     OBJ_FREEZE(str);
 
     if (st_lookup(global_symbols.str_id, str, &id)) {
+	if (ID_DYNAMIC_SYM_P((ID)id)) {
+	    return (ID)dsymbol_check((VALUE)id);
+	}
 	return (ID)id;
     }