Merge pull request #1669 from noxdafox/priority-info

Handle generic data structures in priority queue info callback

Author: lukebakken

src/rabbit_priority_queue.erl

@@ -666,8 +666,8 @@ cse(_, lazy)                -> lazy;
 cse(lazy, _)                -> lazy;
 %% numerical stats
 cse(A, B) when is_number(A) -> A + B;
-cse({delta, _, _, _, _}, _)    -> {delta, todo, todo, todo, todo};
-cse(A, B)                   -> exit({A, B}).
+cse({delta, _, _, _, _}, _) -> {delta, todo, todo, todo, todo};
+cse(_, _)                   -> undefined.
 
 %% When asked about 'head_message_timestamp' fro this priority queue, we
 %% walk all the backing queues, starting by the highest priority. Once a