Add proper error when failing to load next.config.js

[ijjk]

This adds a proper error when we fail to load a user's next.config.js as the default node error can be confusing on its own and makes it seem like something failed internally in Next.js. We can expand on the included error doc added and potentially also add better syntax errors by parsing with acorn when we fail to load this file in the future.

screenshot

[ijjk]

Failing test suites

Commit: b838c7c

test/acceptance/ReactRefreshLogBox.dev.test.js

• server-side only compilation errors

Expand output

● server-side only compilation errors

ScriptTimeoutError: script timeout
  (Session info: headless chrome=92.0.4515.131)

  72 |
  73 |             // Wait for application to re-hydrate:
> 74 |             await browser.executeAsyncScript(function () {
     |             ^
  75 |               var callback = arguments[arguments.length - 1]
  76 |               if (window.__NEXT_HYDRATED) {
  77 |                 callback()

  at Object.throwDecodedError (../node_modules/selenium-webdriver/lib/error.js:550:15)
  at parseHttpResponse (../node_modules/selenium-webdriver/lib/http.js:565:13)
  at Executor.execute (../node_modules/selenium-webdriver/lib/http.js:491:26)
      at runMicrotasks (<anonymous>)
  at Proxy.execute (../node_modules/selenium-webdriver/lib/webdriver.js:700:17)
  at Object.patch (acceptance/helpers.js:74:13)
  at Object.<anonymous> (acceptance/ReactRefreshLogBox.dev.test.js:1422:3)

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
buildDuration	11.5s	11.4s	-100ms
buildDurationCached	2.9s	2.9s	-48ms
nodeModulesSize	49.1 MB	49.1 MB	⚠️ +677 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.251	2.249	0
/ avg req/sec	1110.77	1111.41	+0.64
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.271	1.248	-0.02
/error-in-render avg req/sec	1967.05	2003.84	+36.79

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
745.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	23.1 kB	23.1 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	67 kB	67 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js add/config-load-error	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	2.64 kB	2.64 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	904 B	904 B	✓
image-HASH.js gzip	4.13 kB	4.13 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	12.9 kB	12.9 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
_buildManifest.js gzip	491 B	491 B	✓
Overall change	491 B	491 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
index.html gzip	540 B	540 B	✓
link.html gzip	552 B	552 B	✓
withRouter.html gzip	532 B	532 B	✓
Overall change	1.62 kB	1.62 kB	✓

---

Webpack 4 Mode (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
buildDuration	9.4s	9.3s	-56ms
buildDurationCached	3.9s	3.8s	-69ms
nodeModulesSize	49.1 MB	49.1 MB	⚠️ +677 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.255	2.293	⚠️ +0.04
/ avg req/sec	1108.52	1090.27	⚠️ -18.25
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.27	1.288	⚠️ +0.02
/error-in-render avg req/sec	1969.15	1940.71	⚠️ -28.44

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
16.HASH.js gzip	186 B	186 B	✓
677f882d2ed8..HASH.js gzip	14 kB	14 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	67.9 kB	67.9 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
_app-HASH.js gzip	965 B	965 B	✓
_error-HASH.js gzip	3.71 kB	3.71 kB	✓
amp-HASH.js gzip	552 B	552 B	✓
css-HASH.js gzip	333 B	333 B	✓
dynamic-HASH.js gzip	2.83 kB	2.83 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	2.95 kB	2.95 kB	✓
withRouter-HASH.js gzip	294 B	294 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	17.8 kB	17.8 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
_buildManifest.js gzip	497 B	497 B	✓
Overall change	497 B	497 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js add/config-load-error	Change
index.html gzip	585 B	585 B	✓
link.html gzip	598 B	598 B	✓
withRouter.html gzip	579 B	579 B	✓
Overall change	1.76 kB	1.76 kB	✓

Commit: bdf9983