Fix scan opt since the new constant cache.

theano/scan_module/scan_op.py

@@ -182,8 +182,8 @@ class Scan(PureOp):
         self.n_tap_outs = self.n_mit_mot + self.n_mit_sot
         if not self.info['gpu']:
             tmp_in, tmp_out = scan_utils.reconstruct_graph(self.inputs,
-                                                       self.outputs)
-            local_fgraph = gof.FunctionGraph(tmp_in, tmp_out)
+                                                           self.outputs)
+            local_fgraph = gof.FunctionGraph(tmp_in, tmp_out, clone=False)
             self._cmodule_key = gof.CLinker().cmodule_key_(local_fgraph, [])
             self._hash_inner_graph = hash(self._cmodule_key)
         else:

theano/scan_module/scan_opt.py

@@ -173,7 +173,7 @@ class PushOutNonSeqScan(gof.Optimizer):
         clean_inputs, clean_outputs = scan_utils.reconstruct_graph(
             node.op.inputs, node.op.outputs)
 
-        local_fgraph = gof.FunctionGraph(clean_inputs, clean_outputs)
+        local_fgraph = gof.FunctionGraph(clean_inputs, clean_outputs, clone=False)
         max_iterations = 2 * len(local_fgraph.toposort()) + 3
         counts = 0
         to_remove = []
@@ -347,7 +347,7 @@ class PushOutSeqScan(gof.Optimizer):
         clean_inputs, clean_outputs = scan_utils.reconstruct_graph(
             node.op.inputs, node.op.outputs)
 
-        local_fgraph = gof.FunctionGraph(clean_inputs, clean_outputs)
+        local_fgraph = gof.FunctionGraph(clean_inputs, clean_outputs, clone=False)
         max_iterations = 2 * len(local_fgraph.toposort()) + 3
         counts = 0
         to_remove = []