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fix: remove off-by-one in inference prompt truncation #3890

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fix: remove off-by-one in inference prompt truncation #3890

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2 changes: 1 addition & 1 deletion fastchat/serve/inference.py
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ def generate_stream(
if model.config.is_encoder_decoder:
max_src_len = context_len
else: # truncate
max_src_len = context_len - max_new_tokens - 1
max_src_len = context_len - max_new_tokens

input_ids = input_ids[-max_src_len:]
output_ids = list(input_ids)
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