commit dc9fa4dce1327560e674ffd9d3fb5430e129eb07
Author: Jacek Bukarewicz <j.bukarewicz@samsung.com>
Date:   Wed Nov 12 13:25:55 2014 +0100

    Do not attempt to send unset error when dispatching auto-activation messages
    
    Error is not always set when bus_dispatch_matches returns FALSE.
    This can happen if access is denied on receive rule. Attempt to send
    unset error results in assertion failure which can trigger SIGABRT.

diff --git a/bus/activation.c b/bus/activation.c
index bdf9cf3..0cedc84 100644
--- a/bus/activation.c
+++ b/bus/activation.c
@@ -1199,11 +1199,14 @@ bus_activation_send_pending_auto_activation_messages (BusActivation  *activation
                * to the original method invoker; in particular, we don't
                * want to make the RequestName call fail with that error
                * (see fd.o #78979, CVE-2014-3477). */
-              if (!bus_transaction_send_error_reply (transaction, entry->connection,
-                                                     &error, entry->activation_message))
+              if (dbus_error_is_set (&error))
                 {
-                  bus_connection_send_oom_error (entry->connection,
-                                                 entry->activation_message);
+                  if (!bus_transaction_send_error_reply (transaction, entry->connection,
+                                                         &error, entry->activation_message))
+                    {
+                      bus_connection_send_oom_error (entry->connection,
+                                                     entry->activation_message);
+                    }
                 }
 
               link = next;