error

Traceback (most recent call last):
  File "theanorngclone.py", line 12, in <module>
    f = theano.function([x_sub], samples_sub)
  File "/Users/bayerj/devel/Theano/theano/compile/function.py", line 222, in function
    profile=profile)
  File "/Users/bayerj/devel/Theano/theano/compile/pfunc.py", line 506, in pfunc
    on_unused_input=on_unused_input)
  File "/Users/bayerj/devel/Theano/theano/compile/function_module.py", line 1298, in orig_function
    on_unused_input=on_unused_input).create(
  File "/Users/bayerj/devel/Theano/theano/compile/function_module.py", line 994, in __init__
    fgraph, additional_outputs = std_fgraph(expanded_inputs, outputs, accept_inplace)
  File "/Users/bayerj/devel/Theano/theano/compile/function_module.py", line 133, in std_fgraph
    fgraph = gof.fg.FunctionGraph(inputs, outputs)
  File "/Users/bayerj/devel/Theano/theano/gof/fg.py", line 107, in __init__
    self.__import_r__(outputs)
  File "/Users/bayerj/devel/Theano/theano/gof/fg.py", line 225, in __import_r__
    self.__import__(apply_node)
  File "/Users/bayerj/devel/Theano/theano/gof/fg.py", line 316, in __import__
    r)
theano.gof.fg.MissingInputError: ('An input of the graph, used to compute Shape(x), was not provided and not given a value', x)

theanorngclone.py

import theano
import theano.tensor as T
from theano.tensor.shared_randomstreams import RandomStreams

x = T.matrix('x')
x_sub = T.matrix('x_sub')
rng = RandomStreams()
samples = rng.normal(size=x.shape)

samples_sub = theano.clone(samples, {x: x_sub})

f = theano.function([x_sub], samples_sub)