[dynamo] add USER_ERROR graph break hint to some dynamic shapes errors, chain underlying exceptions by williamwen42 · Pull Request #172694 · pytorch/pytorch

williamwen42 · 2026-01-17T00:16:46Z

Stack from ghstack (oldest at bottom):

-> [dynamo] add USER_ERROR graph break hint to some dynamic shapes errors, chain underlying exceptions #172694

This is to improve error messages of Dynamo FX node failures, in particular:

we suggest the user to run their code in eager to see if the error occurs
we chain exceptions wherever we were missing them in torch/_dynamo/utils.py

cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @kadeng @chauhang @amjames @Lucaskabela @jataylo

…s, chain underlying exceptions [ghstack-poisoned]

pytorch-bot · 2026-01-17T00:16:50Z

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…s, chain underlying exceptions ghstack-source-id: 41e8396 Pull Request resolved: #172694

…hapes errors, chain underlying exceptions" cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx kadeng chauhang amjames Lucaskabela jataylo [ghstack-poisoned]

…s, chain underlying exceptions ghstack-source-id: 58801cc Pull Request resolved: #172694

…hapes errors, chain underlying exceptions" cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx kadeng chauhang amjames Lucaskabela jataylo [ghstack-poisoned]

…s, chain underlying exceptions ghstack-source-id: b6817f3 Pull Request resolved: #172694

…hapes errors, chain underlying exceptions" cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx kadeng chauhang amjames Lucaskabela jataylo [ghstack-poisoned]

…s, chain underlying exceptions ghstack-source-id: e26c4f8 Pull Request resolved: #172694

williamwen42 · 2026-01-28T23:19:13Z

torch/_dynamo/graph_break_registry.json

      "Context": "fn={fn}, args={args}, kwargs={kwargs}",
      "Explanation": "All __torch_function__ overrides for for function {fn} returned NotImplemented",
      "Hints": [
-        "Dynamo has detected that tracing the code will result in an error when running in eager. Please double check that your code doesn't contain a similar error when actually running eager/uncompiled."


Editing the entries directly (instead of adding new ones) should be fine since the graph break link generator (https://github.com/meta-pytorch/compile-graph-break-site/blob/main/generate-site.py and

pytorch/torch/_dynamo/exc.py

Line 561 in a7d0474

def get_gbid_documentation_link(gb_type: str) -> Optional[str]:

) doesn't exact match on hints.

…hapes errors, chain underlying exceptions" This is to improve error messages of Dynamo FX node failures, in particular: - we suggest the user to run their code in eager to see if the error occurs - we chain exceptions wherever we were missing them in torch/_dynamo/utils.py cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx kadeng chauhang amjames Lucaskabela jataylo [ghstack-poisoned]

…s, chain underlying exceptions ghstack-source-id: 0319dcb Pull Request resolved: #172694

williamwen42 · 2026-02-02T19:37:29Z

@pytorchbot merge

pytorchmergebot · 2026-02-02T22:50:38Z

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pytorchmergebot · 2026-02-02T22:50:49Z

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williamwen42 · 2026-02-03T06:01:07Z

@pytorchbot merge

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pytorchmergebot · 2026-02-03T06:03:20Z

Merge failed

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williamwen42 · 2026-02-03T21:17:54Z

@pytorchbot rebase

pytorchmergebot · 2026-02-03T21:19:52Z

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[ghstack-poisoned]

pytorchmergebot · 2026-02-03T21:20:07Z

Successfully rebased gh/williamwen42/380/orig onto refs/remotes/origin/viable/strict, please pull locally before adding more changes (for example, via ghstack checkout https://github.com/pytorch/pytorch/pull/172694)

…s, chain underlying exceptions ghstack-source-id: d96ea89 Pull Request resolved: #172694

williamwen42 · 2026-02-03T22:37:27Z

@pytorchbot merge

pytorchmergebot · 2026-02-03T22:39:49Z

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…underlying exceptions (#172694) Summary: This is to improve error messages of Dynamo FX node failures, in particular: - we suggest the user to run their code in eager to see if the error occurs - we chain exceptions wherever we were missing them in torch/_dynamo/utils.py X-link: pytorch/pytorch#172694 Approved by: https://github.com/pianpwk Reviewed By: izaitsevfb Differential Revision: D92237542 fbshipit-source-id: a627dc45275af5463928fe92bb9ec8c8ab1e6385

…s, chain underlying exceptions (pytorch#172694) This is to improve error messages of Dynamo FX node failures, in particular: - we suggest the user to run their code in eager to see if the error occurs - we chain exceptions wherever we were missing them in torch/_dynamo/utils.py Pull Request resolved: pytorch#172694 Approved by: https://github.com/pianpwk

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

e478dea

…s, chain underlying exceptions [ghstack-poisoned]

williamwen42 mentioned this pull request Jan 16, 2026

[dynamo] disable dynamo recursively on compiled code if fullgraph=True #172295

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pytorch-bot bot added ciflow/inductor module: dynamo labels Jan 17, 2026

williamwen42 added a commit that referenced this pull request Jan 17, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

facda73

…s, chain underlying exceptions ghstack-source-id: 41e8396 Pull Request resolved: #172694

williamwen42 marked this pull request as draft January 17, 2026 00:17

williamwen42 added the topic: not user facing topic category label Jan 19, 2026

williamwen42 added a commit that referenced this pull request Jan 19, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

56bbcd7

…s, chain underlying exceptions ghstack-source-id: 58801cc Pull Request resolved: #172694

williamwen42 added a commit that referenced this pull request Jan 20, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

1c5152f

…s, chain underlying exceptions ghstack-source-id: b6817f3 Pull Request resolved: #172694

williamwen42 mentioned this pull request Jan 26, 2026

[dynamo, docs] Suggest torch.compiler.set_stance("force_eager") to determine if eager code causes issues #166555

Closed

williamwen42 added a commit that referenced this pull request Jan 28, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

1410746

…s, chain underlying exceptions ghstack-source-id: e26c4f8 Pull Request resolved: #172694

williamwen42 marked this pull request as ready for review January 28, 2026 23:15

williamwen42 requested review from ezyang and pianpwk January 28, 2026 23:16

williamwen42 commented Jan 28, 2026

View reviewed changes

pianpwk approved these changes Feb 2, 2026

View reviewed changes

williamwen42 added a commit that referenced this pull request Feb 2, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

c6e61aa

…s, chain underlying exceptions ghstack-source-id: 0319dcb Pull Request resolved: #172694

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Update

a213749

[ghstack-poisoned]

pytorchmergebot pushed a commit that referenced this pull request Feb 3, 2026

[dynamo] add USER_ERROR graph break hint to some dynamic shapes error…

ec5cea4

…s, chain underlying exceptions ghstack-source-id: d96ea89 Pull Request resolved: #172694

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