Fix: Don't read primaryChild.childExpirationTime #18457
Merged
+85
−11
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This is a variant of the fix in 5a0f1d. We can't rely on the primary fiber's `childExpirationTime` field to be correct. In this case, we can read from the Suspense boundary fiber instead. This will include updates that exist in the fallback fiber, but that's not a big deal; the important thing is that we don't drop updates.
facebook-github-bot
added
CLA Signed
React Core Team
|
This pull request is automatically built and testable in CodeSandbox. To see build info of the built libraries, click here or the icon next to each commit SHA. Latest deployment of this branch, based on commit da358fc:
|
Is this the only place we rely on it? |
I think so, yeah |
This was referenced Oct 1, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is a variant of the fix in 5a0f1d5. We can't rely on the primary fiber's
childExpirationTimefield to be correct.In this case, we can read from the Suspense boundary fiber instead. This will include updates that exist in the fallback fiber, but that's not a big deal; the important thing is that we don't drop updates.
Longer term, we'll likely remove fragment reparenting from the Suspense implementation. It's only there to save on memory but because it's the only place we do reparenting, it's been hard to maintain.
If we ever do add reparenting, what this bug demonstrates is that the state tree and the UI tree are not the same thing. It just happens to be that in current React (no reparenting), the "state ancestors" of a node are always subset of its "UI ancestors", which is why we can get away with only having a single return path.