char-rnn issue with new nn.Identity

error.log

creating an lstm with 2 layers
setting forget gate biases to 1 in LSTM layer 1
setting forget gate biases to 1 in LSTM layer 2
number of parameters in the model: 240321
cloning rnn
cloning criterion
/Users/jfsantos/torch/install/bin/luajit: /Users/jfsantos/torch/install/share/lua/5.1/nn/Identity.lua:13: bad argument #1 to 'set' (expecting number or Tensor or Storage at /tmp/luarocks_torch-scm-1-8315/torch7/generic/Tensor.c:1089)
stack traceback:
	[C]: in function 'set'
	/Users/jfsantos/torch/install/share/lua/5.1/nn/Identity.lua:13: in function 'func'
	...jfsantos/torch/install/share/lua/5.1/nngraph/gmodule.lua:252: in function 'neteval'
	...jfsantos/torch/install/share/lua/5.1/nngraph/gmodule.lua:287: in function 'forward'
	train.lua:270: in function 'opfunc'
	...s/jfsantos/torch/install/share/lua/5.1/optim/rmsprop.lua:32: in function 'rmsprop'
	train.lua:314: in main chunk
	[C]: in function 'dofile'
	...ntos/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:131: in main chunk
	[C]: at 0x0103718320