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[pull] main from facebook:main#335

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pull[bot] merged 3 commits into
LoadsAForks:mainfrom
react:main
Nov 25, 2025
Merged

[pull] main from facebook:main#335
pull[bot] merged 3 commits into
LoadsAForks:mainfrom
react:main

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Created by pull[bot] (v2.0.0-alpha.4)

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In ValidateExhaustiveDependencies, I previously changed to allow
extraneous dependencies as long as they were non-reactive. Here we make
that more precise, and distinguish between values that are definitely
referenced in the memo function but optional as dependencies vs values
that are not even referenced in the memo function. The latter now error
as extraneous even if they're non-reactive. This also turned up a case
where constant-folded primitives could show up as false positives of the
latter category, so now we track manual deps which quality for constant
folding and don't error on them.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35204).
* #35213
* #35201
* __->__ #35204
#35201)

Enables `@validateExhaustiveMemoizationDependencies` feature flag by
default, and disables it in select tests that failed due to the change.
Some of our tests intentionally use incorrect memo dependencies in order
to test edge cases.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35201).
* #35213
* __->__ #35201
First, this adds some more tests and organizes them into an
`exhaustive-deps/` subdirectory.

Second, the diagnostics are overhauled. For each memo block we now
report a single diagnostic which summarizes the issue, plus individual
errors for each missing/extra dependency. Within the extra deps, we
distinguish whether it's truly extra vs whether its just a more (too)
precise version of an inferred dep. For example, if you depend on
`x.y.z` but the inferred dep was `x.y`. Finally, we print the full
inferred deps at the end as a hint (it's also a suggestion, but this
makes it more clear what would be suggested).
@pull pull Bot locked and limited conversation to collaborators Nov 25, 2025
@pull pull Bot added the ⤵️ pull label Nov 25, 2025
@pull
pull Bot merged commit fb18ad3 into LoadsAForks:main Nov 25, 2025
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