Don't force python code when it don't work! fix gh-5158

theano/tensor/elemwise.py

@@ -1283,7 +1283,8 @@ second dimension
         Return True if we do not want to compile c code
         when doing constant folding of this node.
         """
-        return node.outputs[0].ndim == 0
+        # The python code don't support 32 inputs or more.
+        return node.outputs[0].ndim == 0 and len(node.inputs) < 32
 
 
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