Ensure updating Context.Consumer inside suspended Suspense component

[okmttdhr]

Summary

Ensure updating Context.Consumer inside suspended Suspense component when context updates. Please see #19701 for details of this bug.

Fixes #19701

Related #14717 #16346 | #20890 | #18796

Test Plan

Run yarn test --watch ReactSuspense-test.internal.

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[sizebot]

Comparing: 51947a1...df5a90b

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	+0.03%	129.66 kB	129.70 kB	+0.04%	41.57 kB	41.59 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	+0.03%	134.80 kB	134.84 kB	+0.03%	43.09 kB	43.10 kB
facebook-www/ReactDOM-prod.classic.js	+0.06%	428.08 kB	428.34 kB	+0.06%	78.65 kB	78.70 kB
facebook-www/ReactDOM-prod.modern.js	+0.06%	417.80 kB	418.06 kB	+0.06%	77.19 kB	77.24 kB
facebook-www/ReactDOMForked-prod.classic.js	+0.06%	428.08 kB	428.34 kB	+0.06%	78.66 kB	78.70 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against df5a90b

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[stale]

This pull request has been automatically marked as stale. If this pull request is still relevant, please leave any comment (for example, "bump"), and we'll keep it open. We are sorry that we haven't been able to prioritize reviewing it yet. Your contribution is very much appreciated.

[okmttdhr]

bump

[gaearon]

Another possible fix: #23095. Not sure what's better.

[okmttdhr]

Another possible fix: #23095. Not sure what's better.

Let me briefly summarize for my understanding.

First of all, this PR is an approach to "directly" update nodes that can be inconsistent only when it knows that there is Consumer in SuspenseComponent. There is a possibility of traverse outside of the propagation root, but if it is consistent, it will break; anyway, so I don't see a problem.

But this PR only fixes the case where the bug in #19701 occurs.
For example, as you mentioned in #23095, it probably won't fix the cases other than #19701 where context fails to propagate (not sure if that exists).

I understood #23095 to be an approach that always traverse up to the propagation root, even if it looks consistent.
From the model perspective, "traverse upwards (past the propagation root) should not be necessary to do", so #23095 update the childLanes only up to the propagation root.
However, I understood that you are worrying about the case where the assumption itself is wrong, as it says;

My concern isn't so much Consumer API but the flaw in modeling. The assumption seems fundamentally flawed and I'm worried how else it might bite us.

[gaearon]

We went with #23095.