Use process status to pass the auto_delete flag

Using a terminate reason makes the channel crash
[#159483364]

Author: dcorbacho

src/rabbit_amqqueue_process.erl

@@ -287,15 +287,16 @@ terminate({shutdown, missing_owner} = Reason, State) ->
 terminate({shutdown, _} = R, State = #q{backing_queue = BQ}) ->
     rabbit_core_metrics:queue_deleted(qname(State)),
     terminate_shutdown(fun (BQS) -> BQ:terminate(R, BQS) end, State);
-terminate(normal,            State) -> %% delete case
-    terminate_shutdown(terminate_delete(true, normal, State), State);
-terminate(auto_delete, State) -> %% auto_delete case
+terminate(normal, State = #q{status = {terminated_by, auto_delete}}) ->
+    %% auto_delete case
     %% To increase performance we want to avoid a mnesia_sync:sync call
     %% after every transaction, as we could be deleting simultaneously
     %% thousands of queues. A optimisation introduced by server#1513
     %% needs to be reverted by this case, avoiding to guard the delete
     %% operation on `rabbit_durable_queue`
     terminate_shutdown(terminate_delete(true, auto_delete, State), State);
+terminate(normal,            State) -> %% delete case
+    terminate_shutdown(terminate_delete(true, normal, State), State);
 %% If we crashed don't try to clean up the BQS, probably best to leave it.
 terminate(_Reason,           State = #q{q = Q}) ->
     terminate_shutdown(fun (BQS) ->
@@ -328,11 +329,13 @@ terminate_delete(EmitStats, Reason0,
             %% don't care if the internal delete doesn't return 'ok'.
             rabbit_amqqueue:internal_delete(QName, ActingUser, Reason0)
         catch
-            {error, Reason} -> error(Reason)
+            {error, ReasonE} -> error(ReasonE)
         end,
         BQS1
     end.
 
+terminated_by({terminated_by, auto_delete}) ->
+    ?INTERNAL_USER;
 terminated_by({terminated_by, ActingUser}) ->
     ActingUser;
 terminated_by(_) ->
@@ -1178,7 +1181,7 @@ handle_call({notify_down, ChPid}, _From, State) ->
     %% gen_server2 *before* the reply is sent.
     case handle_ch_down(ChPid, State) of
         {ok, State1}   -> reply(ok, State1);
-        {stop, State1} -> {stop, auto_delete, ok, State1}
+        {stop, State1} -> stop(ok, State1#q{status = {terminated_by, auto_delete}})
     end;
 
 handle_call({basic_get, ChPid, NoAck, LimiterPid}, _From,