removed check for output guard in debug mode when cycle_detection is fast

theano/compile/debugmode.py

@@ -2272,6 +2272,7 @@ class _Maker(FunctionMaker):  # inheritance buys a few helper functions
                               "of", len(li), "events was stable.",
                               file=sys.stderr)
         self.fgraph = fgraph
+        if theano.config.cycle_detection == 'regular':
             destroy_handler_added = False
             for feature in fgraph._features:
                 if isinstance(feature, gof.DestroyHandler):