Traceback (most recent call last):


 "/nethome/oshaikh3/miniconda3/lib/python3.7/site-packages/torch/multiprocessing/spawn.py", line 20, in _wrap

fn(i, *args)


 "/nethome/oshaikh3/og_fairseq/fairseq/distributed_utils.py", line 156, in distributed_main

main(args, **kwargs)


 "/nethome/oshaikh3/og_fairseq/fairseq_cli/train.py", line 121, in main

valid_losses, should_stop = train(args, trainer, task, epoch_itr)


 "/nethome/oshaikh3/miniconda3/lib/python3.7/contextlib.py", line 74, in inner

return func(*args, **kwds)


 "/nethome/oshaikh3/og_fairseq/fairseq_cli/train.py", line 216, in train

log_output = trainer.train_step(samples)


 "/nethome/oshaikh3/miniconda3/lib/python3.7/contextlib.py", line 74, in inner

return func(*args, **kwds)


 "/nethome/oshaikh3/og_fairseq/fairseq/trainer.py", line 457, in train_step

raise e


 "/nethome/oshaikh3/og_fairseq/fairseq/trainer.py", line 431, in train_step

ignore_grad=is_dummy_batch,


 "/nethome/oshaikh3/og_fairseq/fairseq/tasks/fairseq_task.py", line 350, in train_step

optimizer.backward(loss)


 "/nethome/oshaikh3/og_fairseq/fairseq/optim/fp16_optimizer.py", line 117, in backward

loss.backward()


 "/nethome/oshaikh3/miniconda3/lib/python3.7/site-packages/torch/tensor.py", line 198, in backward

torch.autograd.backward(self, gradient, retain_graph, create_graph)


 "/nethome/oshaikh3/miniconda3/lib/python3.7/site-packages/torch/autograd/__init__.py", line 100, in backward

allow_unreachable=True)
# allow_unreachable flag
RuntimeError: has_marked_unused_parameters_ INTERNAL ASSERT FAILED at /opt/conda/conda-bld/pytorch_1591914880026/work/torch/csrc/distributed/c10d/reducer.cpp:327, please report a bug to PyTorch.
(mark_variable_ready at /opt/conda/conda-bld/pytorch_1591914880026/work/torch/csrc/distributed/c10d/reducer.cpp:327)

ERROR: Signature extraction failed: Traceback (most recent call last):


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature

video_id, player_url, s


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function

cache_res = res(test_string)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>

return lambda s: initial_function([s])


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 258, in resf

res, abort = self.interpret_statement(stmt, local_vars)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement

v = self.interpret_expression(expr, local_vars, allow_recursion)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression

m.group('expr'), local_vars, allow_recursion - 1)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression

m.group('x'), local_vars, allow_recursion - 1)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement

v = self.interpret_expression(expr, local_vars, allow_recursion)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression

m.group('x'), local_vars, allow_recursion - 1)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement

v = self.interpret_expression(expr, local_vars, allow_recursion)


 "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression

raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[function(c,d){d=(d'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see
https://yt-dl.org/update
on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
