Bug Description

ERROR: [Torch-TensorRT] - Method requested cannot be compiled by Torch-TensorRT.TorchScript.
Unsupported operators listed below:

• aten::lstm.input(Tensor input, Tensor[] hx, Tensor[] params, bool has_biases, int num_layers, float dropout, bool train, bool bidirectional, bool batch_first) -> (Tensor, Tensor, Tensor)
• aten::Int.Tensor(Tensor a) -> (int)

Additional context

CRNN model conversion (example https://github.com/GitYCC/crnn-pytorch)