Include page for export errors for easier debugging

[ijjk]

This makes sure to include the page for dynamic routes when they encounter an error during prerendering as we currently only include the path, e.g. before we would only show /blog/first and now we show /blog/[slug]: /blog/first

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running yarn lint

[ijjk]

Stats from current PR

Default Build

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
buildDuration	16.7s	16.3s	-368ms
buildDurationCached	3s	3s	⚠️ +41ms
nodeModulesSize	347 MB	347 MB	⚠️ +251 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.649	2.704	⚠️ +0.06
/ avg req/sec	943.91	924.65	⚠️ -19.26
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.248	1.234	-0.01
/error-in-render avg req/sec	2003.26	2026.59	+23.33

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	28.4 kB	28.4 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.3 kB	72.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.38 kB	2.38 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	635 B	635 B	✓
image-HASH.js gzip	4.49 kB	4.49 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.87 kB	1.87 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
index.html gzip	532 B	532 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
buildDuration	17.7s	17.9s	⚠️ +223ms
buildDurationCached	3s	3s	-53ms
nodeModulesSize	347 MB	347 MB	⚠️ +251 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.705	2.665	-0.04
/ avg req/sec	924.17	937.95	+13.78
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.23	1.241	⚠️ +0.01
/error-in-render avg req/sec	2031.72	2013.83	⚠️ -17.89

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.6 kB	28.6 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.5 kB	72.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	622 B	622 B	✓
image-HASH.js gzip	4.53 kB	4.53 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	1.9 kB	1.9 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/export-error-page	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 8bdcc13