[flex_attention] replace sliced BlockMask noop with helpful error #164702
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Fixes part of pytorch#163314 After slicing BlockMask, mask_mod was silently replaced with noop_mask. Replace with error that guides users to use base_mask.mask_mod instead.
Aminsed
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albanD,
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mikaylagawarecki
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drisspg
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drisspg
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@drisspg @BoyuanFeng Could you please merge as I'm not authorized. |
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@pytorchbot merge |
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…torch#164702) Fixes part of pytorch#163314 After slicing BlockMask with `[]`, mask_mod was silently replaced with noop_mask. This caused silent incorrect results when users applied transformations to `sliced_mask.mask_mod`. Replace noop with `_sliced_mask_mod_error` that raises RuntimeError with guidance to use `base_mask.mask_mod` instead. Pull Request resolved: pytorch#164702 Approved by: https://github.com/drisspg, https://github.com/BoyuanFeng
…torch#164702) Fixes part of pytorch#163314 After slicing BlockMask with `[]`, mask_mod was silently replaced with noop_mask. This caused silent incorrect results when users applied transformations to `sliced_mask.mask_mod`. Replace noop with `_sliced_mask_mod_error` that raises RuntimeError with guidance to use `base_mask.mask_mod` instead. Pull Request resolved: pytorch#164702 Approved by: https://github.com/drisspg, https://github.com/BoyuanFeng
…torch#164702) Fixes part of pytorch#163314 After slicing BlockMask with `[]`, mask_mod was silently replaced with noop_mask. This caused silent incorrect results when users applied transformations to `sliced_mask.mask_mod`. Replace noop with `_sliced_mask_mod_error` that raises RuntimeError with guidance to use `base_mask.mask_mod` instead. Pull Request resolved: pytorch#164702 Approved by: https://github.com/drisspg, https://github.com/BoyuanFeng
5 participants
Fixes part of #163314
After slicing BlockMask with
[], mask_mod was silently replaced with noop_mask. This caused silent incorrect results when users applied transformations tosliced_mask.mask_mod.Replace noop with
_sliced_mask_mod_errorthat raises RuntimeError with guidance to usebase_mask.mask_modinstead.cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @kadeng @muchulee8 @amjames @chauhang @aakhundov @coconutruben @drisspg @Chillee @yanboliang @BoyuanFeng