Upgrade React from `4a3d993e-20260114` to `bb8a76c6-20260115` by nextjs-bot · Pull Request #88592 · vercel/next.js

nextjs-bot · 2026-01-15T16:25:12Z

diff facebook/react@4a3d993e...bb8a76c6

React upstream changes

eps1lon · 2026-01-15T16:27:16Z

Nothing interesting in here

nextjs-bot · 2026-01-15T16:34:56Z

Failing test suites

Commit: b45558c | About building and testing Next.js

pnpm test-start test/e2e/app-dir/cache-components/cache-components.params.test.ts (job)

cache-components > Param Shadowing > should correctly allow param names like then, value, and status when awaiting params in a server component (DD)
cache-components > Params > should partially prerender pages that await params in a server components (DD)
cache-components > Params > should fully prerender pages that check individual param keys after awaiting params in a server component (DD)
cache-components > Params > should partially prerender pages that spread awaited params in a server component (DD)

Expand output

● cache-components › Params › should partially prerender pages that await params in a server components

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Params › should partially prerender pages that use params in a client components

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Params › should fully prerender pages that check individual param keys after awaiting params in a server component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Params › should fully prerender pages that check individual param keys after useing params in a client component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Params › should partially prerender pages that spread awaited params in a server component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Params › should partially prerender pages that spread useed params in a client component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Param Shadowing › should correctly allow param names like then, value, and status when awaiting params in a server component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › Param Shadowing › should correctly allow param names like then, value, and status when useing params in a client component

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● cache-components › generateStaticParams › should have cacheComponents semantics inside generateStaticParams

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

pnpm test-start-turbo test/e2e/app-dir/segment-cache/prefetch-runtime/prefetch-runtime.test.ts (turbopack) (job)

runtime prefetching > in a page > can completely prefetch a page that uses cookies and no uncached IO (DD)

Expand output

● runtime prefetching › in a page › can completely prefetch a page that uses cookies and no uncached IO

apiRequestContext.fetch: socket hang up
Call log:
  - → GET http://localhost:46751/in-page/cookies-only?_rsc=xlawk
  -   user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/130.0.6723.31 Safari/537.36
  -   accept: */*
  -   accept-encoding: gzip,deflate,br
  -   cookie: testCookie=initialValue
  -   next-test-fetch-priority: low
  -   referer: http://localhost:46751/
  -   next-router-prefetch: 1
  -   next-router-segment-prefetch: /!KGRlZmF1bHQp/in-page
  -   next-url: /
  -   rsc: 1
  -   sec-ch-ua: "Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"
  -   sec-ch-ua-mobile: ?0
  -   sec-ch-ua-platform: "Linux"

  225 |             // server; we pass the request to the server the immediately.
  226 |             result: (async () => {
> 227 |               const originalResponse = await page.request.fetch(request, {
      |                                                           ^
  228 |                 maxRedirects: 0,
  229 |               })
  230 |

  at fetch (lib/router-act.ts:227:59)
  at lib/router-act.ts:245:13
  at routeHandler (lib/router-act.ts:257:7)

● runtime prefetching › in a page › can completely prefetch a page that uses cookies and no uncached IO

apiRequestContext.fetch: socket hang up
Call log:
  - → GET http://localhost:46751/in-page/cookies-only?_rsc=o863q
  -   user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/130.0.6723.31 Safari/537.36
  -   accept: */*
  -   accept-encoding: gzip,deflate,br
  -   cookie: testCookie=initialValue
  -   next-test-fetch-priority: low
  -   referer: http://localhost:46751/
  -   next-router-prefetch: 1
  -   next-router-segment-prefetch: /!KGRlZmF1bHQp
  -   next-url: /
  -   rsc: 1
  -   sec-ch-ua: "Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"
  -   sec-ch-ua-mobile: ?0
  -   sec-ch-ua-platform: "Linux"

  225 |             // server; we pass the request to the server the immediately.
  226 |             result: (async () => {
> 227 |               const originalResponse = await page.request.fetch(request, {
      |                                                           ^
  228 |                 maxRedirects: 0,
  229 |               })
  230 |

  at fetch (lib/router-act.ts:227:59)
  at lib/router-act.ts:245:13
  at routeHandler (lib/router-act.ts:257:7)

● runtime prefetching › in a page › can completely prefetch a page that uses cookies and no uncached IO

apiRequestContext.fetch: socket hang up
Call log:
  - → GET http://localhost:46751/in-page/cookies-only?_rsc=o863q
  -   user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/130.0.6723.31 Safari/537.36
  -   accept: */*
  -   accept-encoding: gzip,deflate,br
  -   cookie: testCookie=initialValue
  -   next-test-fetch-priority: low
  -   referer: http://localhost:46751/
  -   next-router-prefetch: 1
  -   next-router-segment-prefetch: /!KGRlZmF1bHQp
  -   next-url: /
  -   rsc: 1
  -   sec-ch-ua: "Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"
  -   sec-ch-ua-mobile: ?0
  -   sec-ch-ua-platform: "Linux"

  225 |             // server; we pass the request to the server the immediately.
  226 |             result: (async () => {
> 227 |               const originalResponse = await page.request.fetch(request, {
      |                                                           ^
  228 |                 maxRedirects: 0,
  229 |               })
  230 |

  at fetch (lib/router-act.ts:227:59)
  at lib/router-act.ts:245:13
  at routeHandler (lib/router-act.ts:257:7)

nextjs-bot · 2026-01-15T16:43:58Z

Stats from current PR

✅ No significant changes detected

📊 All Metrics

📖 Metrics Glossary

Dev Server Metrics:

Listen = TCP port starts accepting connections
First Request = HTTP server returns successful response
Cold = Fresh build (no cache)
Warm = With cached build artifacts

Build Metrics:

Fresh = Clean build (no .next directory)
Cached = With existing .next directory

Change Thresholds:

Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
Size: Changes < 1KB AND < 1% are insignificant
All other changes are flagged to catch regressions

⚡ Dev Server

Metric	Canary	PR	Change	Trend
Cold (Listen)	506ms	507ms	✓	█▁█▁▁
Cold (Ready in log)	468ms	470ms	✓	▆▆█▆▆
Cold (First Request)	842ms	842ms	✓	▄▇█▇█
Warm (Listen)	506ms	508ms	✓	█▁▅▁▁
Warm (Ready in log)	471ms	467ms	✓	█▁▃▁▁
Warm (First Request)	343ms	335ms	✓	█▂▆▁▆

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	456ms	✓	█▁▁▁▁
Cold (Ready in log)	436ms	436ms	✓	▆▅▄▅▄
Cold (First Request)	1.796s	1.808s	✓	▄▃▂▃▂
Warm (Listen)	456ms	456ms	✓	█▁▁▁▁
Warm (Ready in log)	436ms	435ms	✓	▆▅▃▄▅
Warm (First Request)	1.835s	1.843s	✓	▄▃▂▂▃

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	4.226s	4.217s	✓	█▁▄▁▂
Cached Build	4.192s	4.249s	✓	█▁▄▁▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.925s	13.976s	✓	▃▁▁▁▁
Cached Build	13.985s	13.983s	✓	▄▁▁▁▁
node_modules Size	458 MB	458 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **430 kB** → **430 kB** ✅ -85 B

82 files with content-based hashes (individual files not comparable between builds)

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	788 B	789 B	✓
Total	788 B	789 B	⚠️ +1 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	451 B	450 B	✓
Total	451 B	450 B	✅ -1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
2086.HASH.js gzip	169 B	N/A	-
2161-HASH.js gzip	5.41 kB	N/A	-
2747-HASH.js gzip	4.48 kB	N/A	-
4322-HASH.js gzip	52.3 kB	N/A	-
ec793fe8-HASH.js gzip	62.3 kB	N/A	-
framework-HASH.js gzip	59.8 kB	59.8 kB	✓
main-app-HASH.js gzip	252 B	254 B	✓
main-HASH.js gzip	38.6 kB	38.9 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
1596.HASH.js gzip	N/A	169 B	-
2658-HASH.js gzip	N/A	51.9 kB	-
6349-HASH.js gzip	N/A	4.46 kB	-
7019-HASH.js gzip	N/A	5.43 kB	-
b17a3386-HASH.js gzip	N/A	62.3 kB	-
Total	225 kB	225 kB	✅ -12 B

Polyfills

	Canary	PR	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Total	39.4 kB	39.4 kB	✓

Pages

	Canary	PR	Change
_app-HASH.js gzip	194 B	193 B	✓
_error-HASH.js gzip	182 B	182 B	✓
css-HASH.js gzip	336 B	335 B	✓
dynamic-HASH.js gzip	1.8 kB	1.8 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	352 B	349 B	✓
hooks-HASH.js gzip	385 B	384 B	✓
image-HASH.js gzip	580 B	580 B	✓
index-HASH.js gzip	259 B	258 B	✓
link-HASH.js gzip	2.5 kB	2.51 kB	✓
routerDirect..HASH.js gzip	319 B	317 B	✓
script-HASH.js gzip	385 B	387 B	✓
withRouter-HASH.js gzip	316 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.96 kB	✅ -8 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	125 kB	125 kB	✓
page.js gzip	242 kB	237 kB	🟢 4.86 kB (-2%)
Total	366 kB	362 kB	✅ -4.85 kB

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	655 B	654 B	✓
middleware-r..fest.js gzip	155 B	156 B	✓
middleware.js gzip	33.2 kB	33.2 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.8 kB	34.9 kB	⚠️ +86 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	738 B	738 B	✓
Total	738 B	738 B	✓

Build Cache

	Canary	PR	Change
0.pack gzip	3.66 MB	3.67 MB	🔴 +11.2 kB (+0%)
index.pack gzip	99.3 kB	98.8 kB	✓
index.pack.old gzip	100 kB	98.9 kB	🟢 1.49 kB (-1%)
Total	3.86 MB	3.87 MB	⚠️ +9.27 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	303 kB	303 kB	✓
app-page-exp..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	303 kB	303 kB	✓
app-page-tur..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	300 kB	300 kB	✓
app-page-tur..prod.js gzip	156 kB	156 kB	✓
app-page.run...dev.js gzip	300 kB	300 kB	✓
app-page.run..prod.js gzip	156 kB	156 kB	✓
app-route-ex...dev.js gzip	68.8 kB	68.8 kB	✓
app-route-ex..prod.js gzip	47.6 kB	47.6 kB	✓
app-route-tu...dev.js gzip	68.8 kB	68.8 kB	✓
app-route-tu..prod.js gzip	47.6 kB	47.6 kB	✓
app-route-tu...dev.js gzip	68.4 kB	68.4 kB	✓
app-route-tu..prod.js gzip	47.4 kB	47.4 kB	✓
app-route.ru...dev.js gzip	68.4 kB	68.4 kB	✓
app-route.ru..prod.js gzip	47.3 kB	47.3 kB	✓
dist_client_...dev.js gzip	324 B	324 B	✓
dist_client_...dev.js gzip	326 B	326 B	✓
dist_client_...dev.js gzip	318 B	318 B	✓
dist_client_...dev.js gzip	317 B	317 B	✓
pages-api-tu...dev.js gzip	41.2 kB	41.2 kB	✓
pages-api-tu..prod.js gzip	31.3 kB	31.3 kB	✓
pages-api.ru...dev.js gzip	41.1 kB	41.1 kB	✓
pages-api.ru..prod.js gzip	31.2 kB	31.2 kB	✓
pages-turbo....dev.js gzip	50.8 kB	50.8 kB	✓
pages-turbo...prod.js gzip	38.2 kB	38.2 kB	✓
pages.runtim...dev.js gzip	50.7 kB	50.7 kB	✓
pages.runtim..prod.js gzip	38.2 kB	38.2 kB	✓
server.runti..prod.js gzip	62.2 kB	62.2 kB	✓
Total	2.69 MB	2.69 MB	⚠️ +15 B

📝 Changed Files (7 files)

Files with changes:

app-page-exp..ntime.dev.js
app-page-tur..ntime.dev.js
app-page-tur..ntime.dev.js
app-page.runtime.dev.js
app-route-ex..time.prod.js
app-route-tu..time.prod.js
server.runtime.prod.js

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app-page-exp..ntime.dev.js

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app-page-tur..ntime.dev.js

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app-page-tur..ntime.dev.js

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app-page.runtime.dev.js

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app-route-ex..time.prod.js

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app-route-tu..time.prod.js

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server.runtime.prod.js

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eps1lon · 2026-01-15T20:13:49Z

Nothing interesting in here.

nextjs-bot added 6 commits January 15, 2026 16:24

Update react@experimental

4885975

Update react

69f8f8b

Updated peer dependency references in apps

ead03dc

Updated peer dependency references in libraries

f49d6ad

Update lockfile

88c8e6a

ncc-compiled

b45558c

nextjs-bot assigned eps1lon Jan 15, 2026

nextjs-bot requested a review from eps1lon January 15, 2026 16:25

nextjs-bot added type: react-sync CI approved type: next labels Jan 15, 2026

eps1lon closed this Jan 15, 2026

github-actions Bot added the locked label Jan 30, 2026

github-actions Bot locked as resolved and limited conversation to collaborators Jan 30, 2026

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Upgrade React from `4a3d993e-20260114` to `bb8a76c6-20260115`#88592

Upgrade React from `4a3d993e-20260114` to `bb8a76c6-20260115`#88592
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update/react/19.3.0-canary-bb8a76c6-20260115

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📦 Production Builds (Webpack)

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Stats from current PR

✅ No significant changes detected

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⚡ Production Builds

📦 Production Builds (Webpack)

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