diff -r e4f63f1d502d -r f1f594f29c5e src/mem/ruby/system/RubyPort.hh
--- a/src/mem/ruby/system/RubyPort.hh	Sun Jun 21 20:52:13 2015 +0100
+++ b/src/mem/ruby/system/RubyPort.hh	Tue Jun 23 16:49:40 2015 -0500
@@ -188,8 +188,8 @@
   private:
     void addToRetryList(MemSlavePort * port)
     {
-        assert(std::find(retryList.begin(), retryList.end(), port) ==
-               retryList.end());
+        if (std::find(retryList.begin(), retryList.end(), port) !=
+               retryList.end()) return;
         retryList.push_back(port);
     }