Ensure Next.js core development sourcemaps use correct input file

[timneutkens]

Noticed while debugging that the error output lines did not make sense and found that sourceFileName is not supported in SWC yet. This is a temporary fix until @kdy1 adds the option.

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

[ijjk]

Failing test suites

Commit: 9d90b18

test/unit/webpack-config-overrides.unit.test.js

Expand output

● Test suite failed to run

/home/runner/work/next.js/next.js/packages/next/dist/build/webpack/config/blocks/css/index.js: No element indexed by 1

  at ArraySet_at [as at] (../node_modules/jest-config/node_modules/source-map/lib/array-set.js:109:9)
      at Array.map (<anonymous>)
      at run.next (<anonymous>)

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
buildDuration	15.3s	15.6s	⚠️ +309ms
buildDurationCached	3.6s	3.5s	-96ms
nodeModulesSize	50.3 MB	50.3 MB	⚠️ +3.03 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.676	2.596	-0.08
/ avg req/sec	934.19	962.95	+28.76
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.501	1.456	-0.04
/error-in-render avg req/sec	1665.37	1717.31	+51.94

Client Bundles (main, webpack, commons)

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
745.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	22.8 kB	22.8 kB	✓
webpack-HASH.js gzip	1.5 kB	1.5 kB	✓
Overall change	66.7 kB	66.7 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
_app-HASH.js gzip	980 B	980 B	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	329 B	329 B	✓
dynamic-HASH.js gzip	2.52 kB	2.52 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	903 B	903 B	✓
image-HASH.js gzip	4.1 kB	4.1 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	1.66 kB	1.66 kB	✓
routerDirect..HASH.js gzip	319 B	319 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	320 B	320 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	12.8 kB	12.8 kB	✓

Client Build Manifests

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
_buildManifest.js gzip	490 B	490 B	✓
Overall change	490 B	490 B	✓

Rendered Page Sizes

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
index.html gzip	530 B	530 B	✓
link.html gzip	542 B	542 B	✓
withRouter.html gzip	524 B	524 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Webpack 4 Mode

General Overall increase ⚠️

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
buildDuration	12.2s	12s	-155ms
buildDurationCached	4.7s	4.7s	-81ms
nodeModulesSize	50.3 MB	50.3 MB	⚠️ +3.03 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.661	2.58	-0.08
/ avg req/sec	939.48	968.89	+29.41
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.377	1.397	⚠️ +0.02
/error-in-render avg req/sec	1814.99	1789.76	⚠️ -25.23

Client Bundles (main, webpack, commons)

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
17.HASH.js gzip	185 B	185 B	✓
677f882d2ed8..HASH.js gzip	13.8 kB	13.8 kB	✓
framework.HASH.js gzip	41.9 kB	41.9 kB	✓
main-HASH.js gzip	10.6 kB	10.6 kB	✓
webpack-HASH.js gzip	1.19 kB	1.19 kB	✓
Overall change	67.7 kB	67.7 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
_app-HASH.js gzip	965 B	965 B	✓
_error-HASH.js gzip	3.74 kB	3.74 kB	✓
amp-HASH.js gzip	552 B	552 B	✓
css-HASH.js gzip	333 B	333 B	✓
dynamic-HASH.js gzip	2.71 kB	2.71 kB	✓
head-HASH.js gzip	2.97 kB	2.97 kB	✓
hooks-HASH.js gzip	911 B	911 B	✓
index-HASH.js gzip	231 B	231 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	298 B	298 B	✓
script-HASH.js gzip	2.94 kB	2.94 kB	✓
withRouter-HASH.js gzip	294 B	294 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	17.7 kB	17.7 kB	✓

Client Build Manifests

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
_buildManifest.js gzip	499 B	499 B	✓
Overall change	499 B	499 B	✓

Rendered Page Sizes

	vercel/next.js canary	timneutkens/next.js fix/sourcemap-locations-core-development	Change
index.html gzip	578 B	578 B	✓
link.html gzip	591 B	591 B	✓
withRouter.html gzip	571 B	571 B	✓
Overall change	1.74 kB	1.74 kB	✓

Commit: 9d90b18