use strict replacements for flat_input

Author: ferrine

pymc3/variational/opvi.py

@@ -958,7 +958,7 @@ def set_size_and_deterministic(self, node, s, d, more_replacements=None):
     def to_flat_input(self, node):
         """Replace vars with flattened view stored in self.inputs
         """
-        return theano.clone(node, self.replacements, strict=False)
+        return theano.clone(node, self.replacements)
 
     def symbolic_sample_over_posterior(self, node):
         node = self.to_flat_input(node)
@@ -1186,7 +1186,7 @@ def to_flat_input(self, node):
         """
         Replaces vars with flattened view stored in self.inputs
         """
-        return theano.clone(node, self.replacements, strict=False)
+        return theano.clone(node, self.replacements)
 
     def symbolic_sample_over_posterior(self, node):
         node = self.to_flat_input(node)