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Silence TRL's batch_size=1 padding-free warning in compiled trainer source

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Strip the "anihilate"/"annihilate" warning block from compiled trainer
source so it does not fire when Unsloth auto-enables padding-free mode
with batch size 1 (the common single-GPU case).
This commit is contained in:
Daniel Hanchen 2026-02-09 15:23:03 +00:00
commit d0b162f868
1 changed files with 26 additions and 0 deletions
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26
unsloth/models/rl.py
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@ -1357,6 +1357,32 @@ def _patch_trl_rl_trainers(trainer_file = "grpo_trainer"):
)
RLTrainer_source = RLTrainer_source.replace(_sig_vlm_old, _sig_vlm_new)
# Silence TRL's noisy batch_size=1 + padding-free warning (handles both
# the original "anihilate" typo and the corrected "annihilate" spelling)
for _typo in ("anihilate", "annihilate"):
_idx = RLTrainer_source.find(_typo)
if _idx == -1:
continue
# Walk backwards to find "if args.per_device_train_batch_size"
_block_start = RLTrainer_source.rfind(
"if args.per_device_train_batch_size == 1", 0, _idx
)
if _block_start == -1:
continue
# Walk backwards to the newline before the if
_line_start = RLTrainer_source.rfind("\n", 0, _block_start)
# Walk forwards past the closing paren to the end of the block
_close = RLTrainer_source.find(")", _idx)
if _close == -1:
continue
_block_end = RLTrainer_source.find("\n", _close)
if _block_end == -1:
continue
RLTrainer_source = (
RLTrainer_source[:_line_start] + RLTrainer_source[_block_end:]
)
break
# Remove multiple doc strings
if __RLConfig_doc__ != "" and RLTrainer_source.count(__RLTrainer_doc__) == 2:
RLTrainer_source = RLTrainer_source.replace(__RLTrainer_doc__, "", 1)