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segment cache: add test for passing unawaited promise to context provider - #89339

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ztanner merged 1 commit into
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01-31-add_failing_test_for_unresolved_prefetch_promises
Feb 21, 2026
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segment cache: add test for passing unawaited promise to context provider#89339
ztanner merged 1 commit into
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01-31-add_failing_test_for_unresolved_prefetch_promises

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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.

This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.

Fixed via react/react#35839

Closes#89170

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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

MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃

⚡ Production Builds

MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **399 kB** → **399 kB** ✅ -5 B

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

Server

Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B

📦 Webpack

Client

Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B

Server

Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB

🔄 Shared (bundler-independent)

Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)

Files with changes:

  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js

Diff too large to display

pages-api.runtime.dev.js

Diff too large to display

pages-turbo...time.prod.js

Diff too large to display

pages.runtime.dev.js

Diff too large to display

@ztannerztanner mentioned this pull request Jan 31, 2026
Closed
@ztanner
ztannerforce-pushed the 01-31-add_failing_test_for_unresolved_prefetch_promises branch from bc1adb2 to e0c8338CompareFebruary 17, 2026 00:24
@ztannerztanner changed the title add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
@ztanner
ztannerforce-pushed the 01-31-add_failing_test_for_unresolved_prefetch_promises branch from e0c8338 to ece5534CompareFebruary 17, 2026 01:13
@ztannerztanner changed the title segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
@eps1lon
eps1lonforce-pushed the 01-31-add_failing_test_for_unresolved_prefetch_promises branch from ece5534 to 1308c99CompareFebruary 21, 2026 17:57
@ztanner
ztanner marked this pull request as ready for review February 21, 2026 18:25
@ztannerztanner changed the title segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
@ztanner
ztanner enabled auto-merge (squash) February 21, 2026 18:26
@ztanner
ztanner requested a review from eps1lonFebruary 21, 2026 18:28
@ztanner
ztanner merged commit fd38d5b into canaryFeb 21, 2026
157 checks passed
@ztanner
ztanner deleted the 01-31-add_failing_test_for_unresolved_prefetch_promises branch February 21, 2026 18:29
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Docs: Clicking on Learn Next.js button leads to page with missing text

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@ztanner@nextjs-bot@eps1lon
, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
Skip to content
segment cache: add test for passing unawaited promise to context provider - #89339
Merged
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
Feb 21, 2026
Merged
segment cache: add test for passing unawaited promise to context provider#89339
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
Conversation
@ztanner
@ztannerztanner
commented
Jan 31, 2026•

edited

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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
@nextjs-botnextjs-bot
added

created-by: Next.js team
PRs by the Next.js team.
tests

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Jan 31, 2026
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Jan 31, 2026•

edited

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Tests Passed
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
@ztannerztanner
mentioned this pull request
Jan 31, 2026
 Closed

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ztannerforce-pushed
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01-31-add_failing_test_for_unresolved_prefetch_promises
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from
bc1adb2 to
e0c8338CompareFebruary 17, 2026 00:24
@ztannerztanner
changed the title
add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
@ztanner
ztannerforce-pushed
the
01-31-add_failing_test_for_unresolved_prefetch_promises
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from
e0c8338 to
ece5534CompareFebruary 17, 2026 01:13
@ztannerztanner
changed the title
segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
@eps1lon
eps1lonforce-pushed
the
01-31-add_failing_test_for_unresolved_prefetch_promises
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from
ece5534 to
1308c99CompareFebruary 21, 2026 17:57
@ztanner
ztanner
marked this pull request as ready for review
February 21, 2026 18:25
@ztannerztanner
changed the title
segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
@ztanner
ztanner
enabled auto-merge (squash)
February 21, 2026 18:26
@ztanner
ztanner
requested a review
from eps1lonFebruary 21, 2026 18:28
@ztanner
ztanner
merged commit fd38d5b
into
canaryFeb 21, 2026

157 checks passed

@ztanner
ztanner
deleted the

01-31-add_failing_test_for_unresolved_prefetch_promises

branch
February 21, 2026 18:29
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locked as resolved and limited conversation to collaborators
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Successfully merging this pull request may close these issues.

Docs: Clicking on Learn Next.js button leads to page with missing text


3 participants

@ztanner@nextjs-bot@eps1lon

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
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segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
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segment cache: add test for passing unawaited promise to context provider - #89339
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01-31-add_failing_test_for_unresolved_prefetch_promises
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segment cache: add test for passing unawaited promise to context provider#89339
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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
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add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
Skip to content
segment cache: add test for passing unawaited promise to context provider - #89339
Merged
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
Feb 21, 2026
Merged
segment cache: add test for passing unawaited promise to context provider#89339
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
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Jan 31, 2026•

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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
@ztannerztanner
mentioned this pull request
Jan 31, 2026
 Closed

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ztannerforce-pushed
the
01-31-add_failing_test_for_unresolved_prefetch_promises
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from
bc1adb2 to
e0c8338CompareFebruary 17, 2026 00:24
@ztannerztanner
changed the title
add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
@ztanner
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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Docs: Clicking on Learn Next.js button leads to page with missing text


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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
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segment cache: add test for passing unawaited promise to context provider - #89339
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01-31-add_failing_test_for_unresolved_prefetch_promises
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segment cache: add test for passing unawaited promise to context provider#89339
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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
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add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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01-31-add_failing_test_for_unresolved_prefetch_promises

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Docs: Clicking on Learn Next.js button leads to page with missing text


3 participants

@ztanner@nextjs-bot@eps1lon

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
Skip to content
segment cache: add test for passing unawaited promise to context provider - #89339
Merged
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
Feb 21, 2026
Merged
segment cache: add test for passing unawaited promise to context provider#89339
ztanner merged 1 commit into
canaryfrom 
01-31-add_failing_test_for_unresolved_prefetch_promises
Conversation
@ztanner
@ztannerztanner
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Jan 31, 2026•

edited

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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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created-by: Next.js team
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Jan 31, 2026
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
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add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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Docs: Clicking on Learn Next.js button leads to page with missing text


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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
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segment cache: add test for passing unawaited promise to context provider - #89339
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01-31-add_failing_test_for_unresolved_prefetch_promises
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segment cache: add test for passing unawaited promise to context provider#89339
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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
Diff too large to display
pages-api.runtime.dev.js
Diff too large to display
pages-turbo...time.prod.js
Diff too large to display
pages.runtime.dev.js
Diff too large to display
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add failing test for unresolved prefetch promisessegment cache: keep descendant PPR cache nodes deferred under pending parentFeb 17, 2026
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
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[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
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.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
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}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
segment cache: add test for passing unawaited promise to context provider by ztanner · Pull Request #89339 · vercel/next.js · GitHub
Skip to content
segment cache: add test for passing unawaited promise to context provider - #89339
Merged
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01-31-add_failing_test_for_unresolved_prefetch_promises
Feb 21, 2026
Merged
segment cache: add test for passing unawaited promise to context provider#89339
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01-31-add_failing_test_for_unresolved_prefetch_promises
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Adds a failing test proving that if the RSC response from a prefetch contains an unresolved promise, navigating to the page will cause the Suspense boundary wrapping the use of that promise to remain in fallback state indefinitely.
This appears to have regressed in e9a03ac, though the theory is that this is just uncovering a React bug rather than causing the issue.
Fixed via react/react#35839
Closes#89170
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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
MetricCanaryPRChangeTrend
Cold (Listen)507ms507ms✓▁█▁█▂
Cold (Ready in log)484ms483ms✓▁█▁█▃
Cold (First Request)1.049s1.042s✓▁█▄█▄
Warm (Listen)508ms508ms✓▁█▁█▂
Warm (Ready in log)480ms479ms✓▁█▁█▃
Warm (First Request)375ms380ms✓▁█▁█▃
📦 Dev Server (Webpack) (Legacy)
📦 Dev Server (Webpack)
MetricCanaryPRChangeTrend
Cold (Listen)456ms457ms✓▁▁▁▁▁
Cold (Ready in log)453ms453ms✓▁▃▁▁▃
Cold (First Request)2.102s2.062s✓▁▁▁▁▃
Warm (Listen)456ms456ms✓▁▁▁▁▁
Warm (Ready in log)452ms453ms✓▁▂▁▁▂
Warm (First Request)2.077s2.065s✓▁▁▁▁▃
⚡ Production Builds
MetricCanaryPRChangeTrend
Fresh Build4.741s4.735s✓▁█▁▇▅
Cached Build4.664s4.730s✓▁█▁█▅
📦 Production Builds (Webpack) (Legacy)
📦 Production Builds (Webpack)
MetricCanaryPRChangeTrend
Fresh Build14.963s14.948s✓▁▁▁▁▄
Cached Build15.039s14.984s✓▁▁▁▁▄
node_modules Size474 MB474 MB✓▁▁▁▁▁
📦 Bundle Sizes
Bundle Sizes
⚡ Turbopack
Client
Main Bundles: **399 kB** → **399 kB** ✅ -5 B
80 files with content-based hashes (individual files not comparable between builds)
Server
Middleware
CanaryPRChange
middleware-b..fest.js gzip768 B763 B✓
Total768 B763 B✅ -5 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip451 B450 B✓
Total451 B450 B✅ -1 B
📦 Webpack
Client
Main Bundles
CanaryPRChange
5528-HASH.js gzip5.48 kBN/A-
6280-HASH.js gzip57.5 kBN/A-
6335.HASH.js gzip169 BN/A-
912-HASH.js gzip4.53 kBN/A-
e8aec2e4-HASH.js gzip62.6 kBN/A-
framework-HASH.js gzip59.7 kB59.7 kB✓
main-app-HASH.js gzip256 B254 B✓
main-HASH.js gzip39.1 kB39.1 kB✓
webpack-HASH.js gzip1.68 kB1.68 kB✓
262-HASH.js gzipN/A4.53 kB-
2889.HASH.js gzipN/A169 B-
5602-HASH.js gzipN/A5.49 kB-
6948ada0-HASH.js gzipN/A62.6 kB-
9544-HASH.js gzipN/A58.3 kB-
Total231 kB232 kB⚠️ +748 B
Polyfills
CanaryPRChange
polyfills-HASH.js gzip39.4 kB39.4 kB✓
Total39.4 kB39.4 kB✓
Pages
CanaryPRChange
_app-HASH.js gzip194 B194 B✓
_error-HASH.js gzip183 B180 B🟢 3 B (-2%)
css-HASH.js gzip331 B330 B✓
dynamic-HASH.js gzip1.81 kB1.81 kB✓
edge-ssr-HASH.js gzip256 B256 B✓
head-HASH.js gzip351 B352 B✓
hooks-HASH.js gzip384 B383 B✓
image-HASH.js gzip580 B581 B✓
index-HASH.js gzip260 B260 B✓
link-HASH.js gzip2.5 kB2.5 kB✓
routerDirect..HASH.js gzip320 B319 B✓
script-HASH.js gzip386 B386 B✓
withRouter-HASH.js gzip315 B315 B✓
1afbb74e6ecf..834.css gzip106 B106 B✓
Total7.97 kB7.97 kB✅ -2 B
Server
Edge SSR
CanaryPRChange
edge-ssr.js gzip125 kB125 kB✓
page.js gzip253 kB253 kB✓
Total377 kB378 kB⚠️ +276 B
Middleware
CanaryPRChange
middleware-b..fest.js gzip614 B613 B✓
middleware-r..fest.js gzip156 B155 B✓
middleware.js gzip43.8 kB43.7 kB✓
edge-runtime..pack.js gzip842 B842 B✓
Total45.4 kB45.3 kB✅ -98 B
Build Details
Build Manifests
CanaryPRChange
_buildManifest.js gzip715 B718 B✓
Total715 B718 B⚠️ +3 B
Build Cache
CanaryPRChange
0.pack gzip3.96 MB3.97 MB🔴 +6.96 kB (+0%)
index.pack gzip103 kB103 kB✓
index.pack.old gzip104 kB103 kB✓
Total4.17 MB4.17 MB⚠️ +5.61 kB
🔄 Shared (bundler-independent)
Runtimes
CanaryPRChange
app-page-exp...dev.js gzip318 kB318 kB✓
app-page-exp..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip317 kB317 kB✓
app-page-tur..prod.js gzip168 kB168 kB✓
app-page-tur...dev.js gzip314 kB314 kB✓
app-page-tur..prod.js gzip166 kB166 kB✓
app-page.run...dev.js gzip314 kB314 kB✓
app-page.run..prod.js gzip167 kB167 kB✓
app-route-ex...dev.js gzip70.7 kB70.7 kB✓
app-route-ex..prod.js gzip49.1 kB49.1 kB✓
app-route-tu...dev.js gzip70.7 kB70.7 kB✓
app-route-tu..prod.js gzip49.2 kB49.2 kB✓
app-route-tu...dev.js gzip70.3 kB70.3 kB✓
app-route-tu..prod.js gzip48.9 kB48.9 kB✓
app-route.ru...dev.js gzip70.2 kB70.2 kB✓
app-route.ru..prod.js gzip48.9 kB48.9 kB✓
dist_client_...dev.js gzip324 B324 B✓
dist_client_...dev.js gzip326 B326 B✓
dist_client_...dev.js gzip318 B318 B✓
dist_client_...dev.js gzip317 B317 B✓
pages-api-tu...dev.js gzip43.2 kB43.2 kB✓
pages-api-tu..prod.js gzip32.9 kB32.9 kB✓
pages-api.ru...dev.js gzip43.2 kB43.2 kB✓
pages-api.ru..prod.js gzip32.8 kB32.8 kB✓
pages-turbo....dev.js gzip52.5 kB52.5 kB✓
pages-turbo...prod.js gzip38.5 kB38.5 kB✓
pages.runtim...dev.js gzip52.5 kB52.5 kB✓
pages.runtim..prod.js gzip38.4 kB38.4 kB✓
server.runti..prod.js gzip62 kB62 kB✓
Total2.81 MB2.81 MB⚠️ +1 B
📝 Changed Files (4 files)
Files with changes:
  • pages-api-tu..time.prod.js
  • pages-api.runtime.dev.js
  • pages-turbo...time.prod.js
  • pages.runtime.dev.js
View diffs
pages-api-tu..time.prod.js
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pages-api.runtime.dev.js
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pages-turbo...time.prod.js
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pages.runtime.dev.js
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segment cache: keep descendant PPR cache nodes deferred under pending parentsegment cache: add failing test for unresolved prefetch promisesFeb 17, 2026
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segment cache: add failing test for unresolved prefetch promisessegment cache: add test for passing unawaited promise to context providerFeb 21, 2026
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