Fix: ignore tokens in target tensor should be set to -100, not -1 #1
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Loss cannot be computed if labels[~masked_indices] = -1. From BertForMaskedLM documentation: "Indices should be in [-100, 0, ..., config.vocab_size] ... Tokens with indices set to -100 are ignored (masked), the loss is only computed for the tokens with labels in [0, ..., config.vocab_size]"
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Loss cannot be computed if labels[~masked_indices] = -1.
From BertForMaskedLM documentation: "Indices should be in [-100, 0, ..., config.vocab_size] ... Tokens with indices set to -100 are ignored (masked), the loss is only computed for the tokens with labels in [0, ..., config.vocab_size]"