Slightly more detailed error

theano/tensor/opt.py

@@ -382,7 +382,7 @@ class ShapeFeature(object):
         elif s_i.type == T.lscalar:
             return s_i
         else:
-            raise TypeError('Unsupported shape element', s_i)
+            raise TypeError('Unsupported shape element', s_i, s_i.type)
 
     def set_shape(self, r, s):
         assert r not in self.shape_of
@@ -504,7 +504,6 @@ def local_shape_i_lift(node):
     if inode and isinstance(inode.op, Elemwise) and inode.op.scalar_op.nin==1:
         return node.env.shape_feature.shape_of[input]
 
-
 register_canonicalize(local_shape_i_lift)
 register_specialize(local_shape_i_lift)