fix debugmode crash in the buildbot.

theano/compile/debugmode.py

@@ -522,13 +522,15 @@ def _check_inputs(node, storage_map, r_vals, dr_vals, active_nodes, clobber_dr_v
     if warn_input_not_reused:
         vmap=getattr(node.op,'view_map',{})
         for oo,ii in vmap.iteritems():
-            if not _may_share_memory(storage_map[node.outputs[oo]][0],storage_map[node.inputs[ii[0]]][0]):
-                #when a subtensor return a tensor ofndim==0, numpy seam to return a copy.
+            out_var = storage_map[node.outputs[oo]][0]
+            in_var = storage_map[node.inputs[ii[0]]][0]
+            if not _may_share_memory(out_var, in_var):
+                #when a subtensor return a tensor of ndim==0, numpy seam to return a copy.
                 #when have an empty ndarray(happen with output guard) it is not the same. why?
-                if storage_map[node.outputs[oo]][0].ndim>0 and storage_map[node.outputs[oo]][0].size>0:
-                    import pdb;pdb.set_trace()
-                    _may_share_memory(storage_map[node.outputs[oo]][0],storage_map[node.inputs[ii[0]]][0])
-                    warning("input idx %d marked as viewed but new memory allocated by node '%s'"%(ii[0],str(node)))
+
+                if hasattr(out_var,'ndim') and (out_var.ndim>0 and out_var.size>0):
+                    continue
+                warning("input idx %d marked as viewed but new memory allocated by node '%s'"%(ii[0],str(node)))
 
     for r_idx, r in enumerate(node.inputs):
         if not r.type.values_eq(r_vals[r], storage_map[r][0]):