fix(typescript): worker execution failed with custom next.config.js

[SukkaW]

Bug

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

The PR fixes #37122, an issue introduced by #37105.

next.config.js might/will include functions (custom webpack, generateBuildId, exportPathsMap, etc.) that are not able to pass from the main thread to a worker. The PR fixes the issue by only passing primitive args to the worker.

[ijjk]

Failing test suites

Commit: 17c8133

yarn testheadless test/integration/async-modules/test/index.test.js

• Async modules > production mode > can render async AMP pages
• Async modules > serverless mode > can render async AMP pages

Expand output

● Async modules › production mode › can render async AMP pages

TIMED OUT: just now

28 seconds ago

  498 |
  499 |   if (hardError) {
> 500 |     throw new Error('TIMED OUT: ' + regex + '\n\n' + content)
      |           ^
  501 |   }
  502 |   return false
  503 | }

  at Object.check (lib/next-test-utils.js:500:11)
  at Object.<anonymous> (integration/async-modules/test/index.test.js:85:7)

● Async modules › serverless mode › can render async AMP pages

TIMED OUT: just now

24 seconds ago

  498 |
  499 |   if (hardError) {
> 500 |     throw new Error('TIMED OUT: ' + regex + '\n\n' + content)
      |           ^
  501 |   }
  502 |   return false
  503 | }

  at Object.check (lib/next-test-utils.js:500:11)
  at Object.<anonymous> (integration/async-modules/test/index.test.js:85:7)

Read more about building and testing Next.js in contributing.md.

[ijjk]

Thanks!

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
buildDuration	17.3s	16.3s	-1s
buildDurationCached	6.7s	6.8s	⚠️ +172ms
nodeModulesSize	479 MB	479 MB	⚠️ +293 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.788	4.105	⚠️ +0.32
/ avg req/sec	659.97	609.04	⚠️ -50.93
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.421	1.52	⚠️ +0.1
/error-in-render avg req/sec	1759.78	1644.66	⚠️ -115.12

Client Bundles (main, webpack)

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	29.2 kB	29.2 kB	✓
webpack-HASH.js gzip	1.54 kB	1.54 kB	✓
Overall change	73 kB	73 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	308 B	308 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.71 kB	2.71 kB	✓
head-HASH.js gzip	359 B	359 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.73 kB	5.73 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.65 kB	2.65 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	391 B	391 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16 kB	16 kB	✓

Client Build Manifests

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
index.html gzip	533 B	533 B	✓
link.html gzip	547 B	547 B	✓
withRouter.html gzip	529 B	529 B	✓
Overall change	1.61 kB	1.61 kB	✓

---

Default Build with SWC (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
buildDuration	18.4s	19s	⚠️ +654ms
buildDurationCached	6.8s	6.7s	-71ms
nodeModulesSize	479 MB	479 MB	⚠️ +293 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.932	4.255	⚠️ +0.32
/ avg req/sec	635.82	587.56	⚠️ -48.26
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.462	1.537	⚠️ +0.07
/error-in-render avg req/sec	1709.41	1626.74	⚠️ -82.67

Client Bundles (main, webpack)

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.7 kB	42.7 kB	✓
main-HASH.js gzip	29.7 kB	29.7 kB	✓
webpack-HASH.js gzip	1.54 kB	1.54 kB	✓
Overall change	74.1 kB	74.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	311 B	311 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.89 kB	2.89 kB	✓
head-HASH.js gzip	357 B	357 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.82 kB	5.82 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.78 kB	2.78 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	392 B	392 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	16.3 kB	16.3 kB	✓

Client Build Manifests

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
_buildManifest.js gzip	457 B	457 B	✓
Overall change	457 B	457 B	✓

Rendered Page Sizes

	vercel/next.js canary	SukkaW/next.js fix-next-config-worker	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 1d964d4