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add guard for self.weight.quant_state attribute #1837

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add guard for self.weight.quant_state attribute #1837

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5 changes: 4 additions & 1 deletion bitsandbytes/nn/modules.py
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Original file line number Diff line number Diff line change
Expand Up @@ -515,7 +515,10 @@ def _save_to_state_dict(self, destination, prefix, keep_vars):
save weight and bias,
then fill state_dict with components of quant_state
"""
if getattr(self.weight.quant_state, "packing_format_for_cpu", False):
if (
getattr(self.weight, "quant_state", None) is not None
and getattr(self.weight.quant_state, "packing_format_for_cpu", False)
):
self.weight.data, self.weight.quant_state = _convert_weight_packed_for_cpu_inverse(
self.weight.data, self.weight.quant_state
)
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