+2013-04-21 MORIOKA Tomohiko <tomo.git@chise.org>
+
+ * cos.c (concord_object_get_feature_value): If
+ `concord_current_env' is not a valid CONCORD_DS object, set NULL.
+
+ * symbol.c (cos_release_symbol): Treat `composition' as a builtin
+ symbol.
+
2013-04-20 MORIOKA Tomohiko <tomo.git@chise.org>
* cos.c (concord_decode_object): Delete printf to debug.