minor fix

theano/gof/destroyhandler.py

@@ -397,8 +397,8 @@ def get_destroyers_of(r):
         def has_destroyers(protected_list):
             visited_app_set = set()
 
-            def recursive_destroys_finder(clients_list):
-                for (app, idx) in clients_list:
+            def recursive_destroys_finder(protected_var):
+                for (app, idx) in protected_var.clients:
                     if app in visited_app_set:
                         continue
                     else:
@@ -409,12 +409,12 @@ def recursive_destroys_finder(clients_list):
                     if idx in [dmap for sublist in destroy_maps for dmap in sublist]:
                         return True
                     for var in getattr(app.op, 'view_map', {}).keys():
-                        if recursive_destroys_finder(app.outputs[var].clients):
-                            return True
+                        if idx in app.op.view_map[var] and recursive_destroys_finder(app.outputs[var]):
+                                return True
                 return False
 
             for protected_var in protected_list:
-                if recursive_destroys_finder(protected_var.clients):
+                if recursive_destroys_finder(protected_var):
                     return True
 
         fgraph.has_destroyers = has_destroyers