...and here, too.

libwccl/values/matchvector.h

@@ -57,7 +57,7 @@ public:
 	 * Const version.
 	 * @note Indexing is assumed from 1.
 	 */
-	const boost::shared_ptr<const Match>& submatch(size_t idx) const;
+	const boost::shared_ptr<const Match> submatch(size_t idx) const;
 
 	void clear() {
 		matches_.clear();