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Summary:
Fixes #1819

Yoga has a fast path when measuring a node, if it thinks it knows its dimensions ahead of time.

This path has some eroneous logic, to set both axis to owner size, if either will evaluate to zero, while having an YGMeasureModeAtMost/FitContent constraint. This means that if a node is given a zero width, and Yoga later measures with with FitContent, its height will become the maximum allowable height, even if it shouldn't be that large.

We can fix this, by only allowing if both axis are this fixed case, instead of just one.

This bug has existed for about a decade (going back to at least D3312496).

Changelog:
[General][Fixed] - Fix possible invalid measurements with width or height is zero pixels

Reviewed By: yungsters

Differential Revision: D76851589

… pixels

Summary:
Fixes facebook#1819

Yoga has a fast path when measuring a node, if it thinks it knows its dimensions ahead of time.

This path has some eroneous logic, to set both axis to owner size, if *either* will evaluate to zero, while having an `YGMeasureModeAtMost`/`FitContent` constraint. This means that if a node is given a zero width, and Yoga later measures with with `FitContent`, its height will become the maximum allowable height, even if it shouldn't be that large.

We can fix this, by only allowing if both axis are this fixed case, instead of just one.

This bug has existed for about a decade (going back to at least D3312496).

Changelog:
[General][Fixed] - Fix possible invalid measurements with width or height is zero pixels

Reviewed By: yungsters

Differential Revision: D76851589
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This pull request was exported from Phabricator. Differential Revision: D76851589

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This pull request has been merged in 4b5ca50.

facebook-github-bot pushed a commit to facebook/react-native that referenced this pull request Jul 1, 2025
… pixels (#52348)

Summary:
X-link: facebook/yoga#1823

Pull Request resolved: #52348

Fixes facebook/yoga#1819

Yoga has a fast path when measuring a node, if it thinks it knows its dimensions ahead of time.

This path has some eroneous logic, to set both axis to owner size, if *either* will evaluate to zero, while having an `YGMeasureModeAtMost`/`FitContent` constraint. This means that if a node is given a zero width, and Yoga later measures with with `FitContent`, its height will become the maximum allowable height, even if it shouldn't be that large.

We can fix this, by only allowing if both axis are this fixed case, instead of just one.

This bug has existed for about a decade (going back to at least D3312496).

Changelog:
[General][Fixed] - Fix possible invalid measurements with width or height is zero pixels

Reviewed By: yungsters

Differential Revision: D76851589

fbshipit-source-id: 6f5a0e6beccc51f591726c9e83e9b90f3350ed0f
facebook-github-bot pushed a commit to facebook/litho that referenced this pull request Jul 1, 2025
… pixels

Summary:
X-link: facebook/yoga#1823

X-link: facebook/react-native#52348

Fixes facebook/yoga#1819

Yoga has a fast path when measuring a node, if it thinks it knows its dimensions ahead of time.

This path has some eroneous logic, to set both axis to owner size, if *either* will evaluate to zero, while having an `YGMeasureModeAtMost`/`FitContent` constraint. This means that if a node is given a zero width, and Yoga later measures with with `FitContent`, its height will become the maximum allowable height, even if it shouldn't be that large.

We can fix this, by only allowing if both axis are this fixed case, instead of just one.

This bug has existed for about a decade (going back to at least D3312496).

Changelog:
[General][Fixed] - Fix possible invalid measurements with width or height is zero pixels

Reviewed By: yungsters

Differential Revision: D76851589

fbshipit-source-id: 6f5a0e6beccc51f591726c9e83e9b90f3350ed0f
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Zero Width May Lead to Height Being Unexpectedly Stretched

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