cutorch.withDevice()

[wanghechong]

i initialize the {encoder, decoder} on CPU, but i share the lookupTable's parameters between them, then i do encoder:cuda() on GPU1, i clone the decoder on GPU2 to decoder_clone， i get the decoder's parameters again, and i clone the pararmeters to decoder_clone on GPU2, but when i run the code, the error is lookuptable's parameters on different GPUS。