classification_report error

File "multitask_finetune.py", line 160, in main
tnews_report = classification_report(all_tnews_gts, all_tnews_preds, digits=4)
File "/usr/local/lib64/python3.6/site-packages/sklearn/metrics/classification.py", line 1568, in classification_report
name_width = max(len(cn) for cn in target_names)
ValueError: max() arg is an empty sequence

Start at multitask_finetune.py line 160 and inspect how all_tnews_gts, all_tnews_preds, and the inputs to sklearn's classification_report are produced. Reproduce the failure by running the relevant multitask fine-tuning entry point, then verify that the classification report completes without the empty-sequence error.

Written by the indexing model from the issue text.