---------------------------------------------------------------------------
FailedPreconditionError                   Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py in _do_call(self, fn, *args)
   1355     try:
-> 1356       return fn(*args)
   1357     except errors.OpError as e:

7 frames
FailedPreconditionError: 2 root error(s) found.
  (0) Failed precondition: Attempting to use uninitialized value model/h16/mlp/c_fc/b
	 [[{{node model/h16/mlp/c_fc/b/read}}]]
	 [[strided_slice_4/_115]]
  (1) Failed precondition: Attempting to use uninitialized value model/h16/mlp/c_fc/b
	 [[{{node model/h16/mlp/c_fc/b/read}}]]
0 successful operations.
0 derived errors ignored.

During handling of the above exception, another exception occurred:

FailedPreconditionError                   Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py in _do_call(self, fn, *args)
   1368           pass
   1369       message = error_interpolation.interpolate(message, self._graph)
-> 1370       raise type(e)(node_def, op, message)
   1371
   1372   def _extend_graph(self):

FailedPreconditionError: 2 root error(s) found.
  (0) Failed precondition: Attempting to use uninitialized value model/h16/mlp/c_fc/b
	 [[node model/h16/mlp/c_fc/b/read (defined at /usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py:54) ]]
	 [[strided_slice_4/_115]]
  (1) Failed precondition: Attempting to use uninitialized value model/h16/mlp/c_fc/b
	 [[node model/h16/mlp/c_fc/b/read (defined at /usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py:54) ]]
0 successful operations.
0 derived errors ignored.

Original stack trace for 'model/h16/mlp/c_fc/b/read':
  File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel_launcher.py", line 16, in <module>
    app.launch_new_instance()
  File "/usr/local/lib/python3.6/dist-packages/traitlets/config/application.py", line 658, in launch_instance
    app.start()
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/kernelapp.py", line 477, in start
    ioloop.IOLoop.instance().start()
  File "/usr/local/lib/python3.6/dist-packages/tornado/ioloop.py", line 888, in start
    handler_func(fd_obj, events)
  File "/usr/local/lib/python3.6/dist-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/zmq/eventloop/zmqstream.py", line 450, in _handle_events
    self._handle_recv()
  File "/usr/local/lib/python3.6/dist-packages/zmq/eventloop/zmqstream.py", line 480, in _handle_recv
    self._run_callback(callback, msg)
  File "/usr/local/lib/python3.6/dist-packages/zmq/eventloop/zmqstream.py", line 432, in _run_callback
    callback(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/kernelbase.py", line 283, in dispatcher
    return self.dispatch_shell(stream, msg)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/kernelbase.py", line 235, in dispatch_shell
    handler(stream, idents, msg)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/kernelbase.py", line 399, in execute_request
    user_expressions, allow_stdin)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/ipkernel.py", line 196, in do_execute
    res = shell.run_cell(code, store_history=store_history, silent=silent)
  File "/usr/local/lib/python3.6/dist-packages/ipykernel/zmqshell.py", line 533, in run_cell
    return super(ZMQInteractiveShell, self).run_cell(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 2718, in run_cell
    interactivity=interactivity, compiler=compiler, result=result)
  File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 2828, in run_ast_nodes
    if self.run_code(code, result):
  File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 2882, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-6-c3120e17ea33>", line 11, in <module>
    save_every=500
  File "/usr/local/lib/python3.6/dist-packages/gpt_2_simple/gpt_2.py", line 165, in finetune
    output = model.model(hparams=hparams, X=context)
  File "/usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py", line 164, in model
    h, present = block(h, 'h%d' % layer, past=past, hparams=hparams)
  File "/usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py", line 128, in block
    m = mlp(norm(x, 'ln_2'), 'mlp', nx*4, hparams=hparams)
  File "/usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py", line 118, in mlp
    h = gelu(conv1d(x, 'c_fc', n_state))
  File "/usr/local/lib/python3.6/dist-packages/gpt_2_simple/src/model.py", line 54, in conv1d
    b = tf.get_variable('b', [nf], initializer=tf.constant_initializer(0))
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 1496, in get_variable
    aggregation=aggregation)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 1239, in get_variable
    aggregation=aggregation)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 562, in get_variable
    aggregation=aggregation)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 514, in _true_getter
    aggregation=aggregation)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 929, in _get_single_variable
    aggregation=aggregation)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 259, in __call__
    return cls._variable_v1_call(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 220, in _variable_v1_call
    shape=shape)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 198, in <lambda>
    previous_getter = lambda **kwargs: default_variable_creator(None, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variable_scope.py", line 2511, in default_variable_creator
    shape=shape)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 263, in __call__
    return super(VariableMetaclass, cls).__call__(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 1568, in __init__
    shape=shape)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/variables.py", line 1755, in _init_from_args
    self._snapshot = array_ops.identity(self._variable, name="read")
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/dispatch.py", line 180, in wrapper
    return target(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/array_ops.py", line 86, in identity
    ret = gen_array_ops.identity(input, name=name)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/gen_array_ops.py", line 4253, in identity
    "Identity", input=input, name=name)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/op_def_library.py", line 788, in _apply_op_helper
    op_def=op_def)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/deprecation.py", line 507, in new_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/ops.py", line 3616, in create_op
    op_def=op_def)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/ops.py", line 2005, in __init__
    self._traceback = tf_stack.extract_stack()