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Fix registration hooks #87369

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antoniojkim
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There is a bug in the implementation of the registration hooks introduced in #86148 whereby if the hook returns a tensor, then the short circuiting logic:

value = hook(self, name, value) or value

Raises an exception

RuntimeError: Boolean value of Tensor with more than one value is ambiguous

Fixing the logic so that it only checks to see if the value is None before overriding

Fixes #85837

CC: @albanD @jbschlosser

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pytorch-bot bot commented Oct 20, 2022

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/87369

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✅ No Failures, 2 Pending

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Oups! good catch.
Could you add a test to ensure we don't regress that in the future please?

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SGTM !

@pytorch-bot pytorch-bot bot added the ciflow/trunk Trigger trunk jobs on your pull request label Oct 20, 2022
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albanD commented Oct 20, 2022

@pytorchbot merge -g

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Merge failed

Reason: 1 additional jobs have failed, first few of them are: trunk

Details for Dev Infra team Raised by workflow job

@antoniojkim antoniojkim force-pushed the antoniojkim/fix_registration_hooks branch from 3442604 to ba338ef Compare October 21, 2022 02:12
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@pytorchbot merge -g

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Merge started

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Hey @antoniojkim.
You've committed this PR, but it does not have both a 'release notes: ...' and 'topics: ...' label. Please add one of each to the PR. The 'release notes: ...' label should represent the part of PyTorch that this PR changes (fx, autograd, distributed, etc) and the 'topics: ...' label should represent the kind of PR it is (not user facing, new feature, bug fix, perf improvement, etc). The list of valid labels can be found here for the 'release notes: ...' and here for the 'topics: ...'.
For changes that are 'topic: not user facing' there is no need for a release notes label.

sgrigory pushed a commit to sgrigory/pytorch that referenced this pull request Oct 28, 2022
There is a bug in the implementation of the registration hooks introduced in pytorch#86148 whereby if the hook returns a tensor, then the short circuiting logic:
```
value = hook(self, name, value) or value
```
Raises an exception
```
RuntimeError: Boolean value of Tensor with more than one value is ambiguous
```
Fixing the logic so that it only checks to see if the value is `None` before overriding

Fixes pytorch#85837

CC: @albanD @jbschlosser
Pull Request resolved: pytorch#87369
Approved by: https://github.com/albanD
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