Turbopack: use bugs.nextjs.org for Turbopack panic error reports #88356

wbinnssmith · 2026-01-10T01:52:39Z

Update the bug report link to use the new bugs.nextjs.org service instead of the direct GitHub discussions URL. Also shares more code when handling terminals that don't support links.

Test Plan: Added a deliberate panic to a turbotask, verified the link.

nextjs-bot · 2026-01-10T01:53:06Z

Allow CI Workflow Run

approve CI run for commit: 2b5fb26

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

nextjs-bot · 2026-01-10T01:53:06Z

Allow CI Workflow Run

approve CI run for commit: 2b5fb26

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

nextjs-bot · 2026-01-10T02:14:08Z

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)	455ms	456ms	✓	▁▁▁▁▁
Cold (Ready in log)	439ms	439ms	✓	▆▆▅▅▆
Cold (First Request)	836ms	837ms	✓	▇█▇█▇
Warm (Listen)	456ms	456ms	✓	▁▁▁▁▁
Warm (Ready in log)	439ms	439ms	✓	▁▁▁▁▁
Warm (First Request)	339ms	336ms	✓	▁▆▆▂▃

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	508ms	✓	▁▁▁▁▁
Cold (Ready in log)	451ms	471ms	✓	▅▄▄▁▄
Cold (First Request)	1.849s	1.909s	✓	▃▂▂▁▂
Warm (Listen)	508ms	456ms	✓	▁▁▁▁▁
Warm (Ready in log)	471ms	450ms	✓	▄▅▄▁▃
Warm (First Request)	1.937s	1.873s	✓	▂▃▂▁▂

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	4.332s	4.316s	✓	▁▂▁▁▁
Cached Build	4.338s	4.378s	✓	▁▁▁▁▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.514s	14.776s	✓	▁▁▁▁▁
Cached Build	14.957s	14.481s	✓	▁▁▁▁▁
node_modules Size	458 MB	458 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **430 kB** → **430 kB** ✅ -81 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	790 B	785 B	✓
Total	790 B	785 B	✅ -5 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	449 B	450 B	✓
Total	449 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	251 B	253 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	✅ -11 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	653 B	655 B	✓
middleware-r..fest.js gzip	155 B	156 B	✓
middleware.js gzip	32.9 kB	33.2 kB	🔴 +331 B (+1%)
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.6 kB	34.9 kB	⚠️ +334 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	3.66 MB	✓
index.pack gzip	99.6 kB	98.5 kB	🟢 1.1 kB (-1%)
index.pack.old gzip	99.1 kB	98.8 kB	✓
Total	3.86 MB	3.86 MB	✅ -1.61 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	✅ -2 B

lukesandberg

no real issues with this, but maybe hold off submitting until we are a bit happier with the ranking?

codspeed-hq · 2026-01-15T22:02:03Z

CodSpeed Performance Report

Merging this PR will degrade performance by 7.38%

_{Comparing wbinnssmith/bugs-report-url (7e7c8d7) with canary (e5905bd)}

Summary

❌ 3 regressed benchmarks
✅ 14 untouched benchmarks
⏩ 3 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
❌	Simulation	`app-page-turbo.runtime.prod.js[tracing]`	583.1 ms	606.4 ms	-3.84%
❌	Simulation	`react-dom-client.development.js[full]`	420.6 ms	453.2 ms	-7.19%
❌	Simulation	`jsonwebtoken.js[full]`	334.8 ms	361.5 ms	-7.38%

3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

Update the bug report link to use the new bugs.nextjs.org service instead of the direct GitHub discussions URL. Also shares more code when handling terminals that don't support links. Test Plan: Added a deliberate panic to a turbotask, verified the link.

nextjs-bot · 2026-01-16T01:10:32Z

Failing test suites

Commit: 7e7c8d7 | About building and testing Next.js

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Jan 10, 2026

wbinnssmith requested review from bgw, lukesandberg and sokra January 10, 2026 01:52

lukesandberg approved these changes Jan 12, 2026

View reviewed changes

wbinnssmith force-pushed the wbinnssmith/bugs-report-url branch from 2b5fb26 to 487e30a Compare January 15, 2026 21:40

wbinnssmith force-pushed the wbinnssmith/bugs-report-url branch from 487e30a to 7e7c8d7 Compare January 16, 2026 00:55

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Turbopack: use bugs.nextjs.org for Turbopack panic error reports #88356

Turbopack: use bugs.nextjs.org for Turbopack panic error reports #88356

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📦 Production Builds (Webpack)

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Stats from current PR

✅ No significant changes detected

⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

📦 Production Builds (Webpack)

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⚡ Turbopack

📦 Webpack

🔄 Shared (bundler-independent)

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CodSpeed Performance Report

Merging this PR will degrade performance by 7.38%

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