Simplify how `json` imports workby turning it into a source transform by lukesandberg · Pull Request #89631 · vercel/next.js

lukesandberg · 2026-02-07T07:29:26Z

Refactor JSON module handling in Turbopack

What?

Moves the JSON module handling from a separate crate (turbopack-json) into the turbopack-ecmascript crate as a source transform, similar to how text and binary files are handled.

Why?

This simplifies the codebase by:

Removing a separate crate dependency
Using a consistent pattern for handling non-JavaScript assets
Improving error handling for invalid JSON files

How?

Removed the turbopack-json crate
Added a new json_source_transform.rs module to turbopack-ecmascript
Implemented two modes for JSON handling:
- Spec-compliant ESM mode (for import ... with { type: 'json' })
- Webpack-compatible CommonJS mode (for regular imports)
Added "no side effects" directive to JSON, text, and binary modules to preserve tree shaking
Updated error handling to provide better feedback for invalid JSON

lukesandberg · 2026-02-07T07:29:58Z

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turbopack/crates/turbopack-ecmascript/src/bytes_source_transform.rs

nextjs-bot · 2026-02-07T07:40:43Z

Failing test suites

Commit: 808696f | About building and testing Next.js

pnpm test-start-turbo test/e2e/app-dir-export/test/start.test.ts (turbopack) (job)

required server files app router > should send the right cache headers for an app route (DD)
required server files app router > should handle optional catchall (DD)
required server files app router > should send the right cache headers for an app page (DD)
required server files app router > should not fail caching (DD)
required server files app router > should properly handle prerender for bot request (DD)
required server files app router > should properly handle fallback for bot request (DD)
required server files app router > should send cache tags in minimal mode for ISR (DD)
required server files app router > should not send cache tags in minimal mode for SSR (DD)
required server files app router > should not send invalid soft tags to cache handler (DD)
required server files app router > should not override params with query params (DD)
required server files app router > should de-dupe HTML/RSC requests for ISR pages (DD)
required server files app router > should isolate cache between different ISR request groups (DD)

Expand output

● required server files app router › should send the right cache headers for an app route

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should handle optional catchall

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should send the right cache headers for an app page

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should not fail caching

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should properly handle prerender for bot request

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should properly handle fallback for bot request

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should send cache tags in minimal mode for ISR

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should not send cache tags in minimal mode for SSR

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should not send invalid soft tags to cache handler

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should not override params with query params

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should de-dupe HTML/RSC requests for ISR pages

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● required server files app router › should isolate cache between different ISR request groups

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● Test suite failed to run

TypeError: Cannot read properties of undefined (reading 'destroy')

  100 |     delete process.env.NOW_BUILDER
  101 |     delete process.env.NEXT_PRIVATE_TEST_HEADERS
> 102 |     await next.destroy()
      |                ^
  103 |     if (server) await killApp(server)
  104 |   })
  105 |

  at Object.destroy (production/standalone-mode/required-server-files/required-server-files-app.test.ts:102:16)

pnpm test-start-turbo test/e2e/app-dir/app-esm-js/standalone.test.ts (turbopack) (job)

next-server-nft > default mode > should not trace too many files in next-minimal-server.js.nft.json (DD)
next-server-nft > with output:standalone > should not trace too many files in next-server.js.nft.json (DD)

Expand output

● next-server-nft › with output:standalone › should not trace too many files in next-server.js.nft.json

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● next-server-nft › default mode › should not trace too many files in next-minimal-server.js.nft.json

expect(received).toMatchInlineSnapshot(snapshot)

Snapshot name: `next-server-nft default mode should not trace too many files in next-minimal-server.js.nft.json 1`

- Snapshot  - 0
+ Received  + 1

@@ -65,7 +65,8 @@
    "/node_modules/next/dist/shared/lib/server-reference-info.js",
    "/node_modules/react/cjs/react.production.js",
    "/node_modules/react/index.js",
    "/node_modules/styled-jsx/dist/index/index.js",
    "/node_modules/styled-jsx/index.js",
+   "/node_modules/styled-jsx/package.json.[json].cjs",
    "/node_modules/styled-jsx/style.js",
  ]

  445 |           '.next/next-minimal-server.js.nft.json'
  446 |         )
> 447 |         expect(trace).toMatchInlineSnapshot(`
      |                       ^
  448 |                 [
  449 |                   "/node_modules/client-only/index.js",
  450 |                   "/node_modules/next/dist/client/components/app-router-headers.js",

  at Object.toMatchInlineSnapshot (production/next-server-nft/next-server-nft.test.ts:447:23)

pnpm test-start-turbo test/production/standalone-mode/no-app-routes/index.test.ts (turbopack) (job)

minimal-mode-response-cache > app router revalidate should work with previous response cache dynamic (DD)
minimal-mode-response-cache > app router revalidate should work with previous response cache (DD)
minimal-mode-response-cache > should have correct "Started server on" log (DD)
minimal-mode-response-cache > should have correct responses (DD)

Expand output

● minimal-mode-response-cache › app router revalidate should work with previous response cache dynamic

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● minimal-mode-response-cache › app router revalidate should work with previous response cache

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● minimal-mode-response-cache › should have correct "Started server on" log

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● minimal-mode-response-cache › should have correct responses

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● Test suite failed to run

TypeError: Cannot read properties of undefined (reading 'destroy')

  88 |     delete process.env.NOW_BUILDER
  89 |     delete process.env.NEXT_PRIVATE_TEST_HEADERS
> 90 |     await next.destroy()
     |                ^
  91 |     if (server) await killApp(server)
  92 |   })
  93 |

  at Object.destroy (production/standalone-mode/response-cache/index.test.ts:90:16)

pnpm test-start-turbo test/production/standalone-mode/runtimeServerDeploymentId/index.test.ts (turbopack) (job)

standalone mode: runtimeServerDeploymentId > it should load app-page (DD)
standalone mode: runtimeServerDeploymentId > it should load app-page-edge (DD)
standalone mode: runtimeServerDeploymentId > it should load app-route (DD)
standalone mode: runtimeServerDeploymentId > it should load app-route-edge (DD)
standalone mode: runtimeServerDeploymentId > it should load pages-page (DD)
standalone mode: runtimeServerDeploymentId > it should load pages-page-edge (DD)
standalone mode: runtimeServerDeploymentId > it should load api/pages-route (DD)
standalone mode: runtimeServerDeploymentId > it should load api/pages-route-edge (DD)

Expand output

● standalone mode: runtimeServerDeploymentId › it should load app-page

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load app-page-edge

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load app-route

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load app-route-edge

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load pages-page

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load pages-page-edge

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load api/pages-route

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

● standalone mode: runtimeServerDeploymentId › it should load api/pages-route-edge

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 1

  27 |     let { exitCode } = await next.build()
  28 |     // eslint-disable-next-line jest/no-standalone-expect
> 29 |     expect(exitCode).toBe(0)
     |                      ^
  30 |
  31 |     await fs.move(
  32 |       join(next.testDir, '.next/standalone'),

  at Object.toBe (production/standalone-mode/runtimeServerDeploymentId/index.test.ts:29:22)

pnpm test-start-turbo test/production/standalone-mode/required-server-files/required-server-files-node-middleware.test.ts (turbopack) (job)

standalone mode - metadata routes > should handle metadata icons correctly (DD)
standalone mode - metadata routes > should handle correctly not-found.js (DD)
standalone mode - metadata routes > should handle private _next unmatched route correctly (DD)
standalone mode - metadata routes > should handle pages rendering correctly (DD)

Expand output

● standalone mode - metadata routes › should handle metadata icons correctly

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● standalone mode - metadata routes › should handle metadata icons correctly

next instance is not initialized yet, make sure you call methods on next instance in test body.

  283 |     get: function (_target, property) {
  284 |       if (!next) {
> 285 |         throw new Error(
      |               ^
  286 |           'next instance is not initialized yet, make sure you call methods on next instance in test body.'
  287 |         )
  288 |       }

  at Object.get (lib/e2e-utils/index.ts:285:15)
  at Object.renameFolder (production/standalone-mode/basic/index.test.ts:14:16)

● standalone mode - metadata routes › should handle correctly not-found.js

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● standalone mode - metadata routes › should handle correctly not-found.js

next instance is not initialized yet, make sure you call methods on next instance in test body.

  283 |     get: function (_target, property) {
  284 |       if (!next) {
> 285 |         throw new Error(
      |               ^
  286 |           'next instance is not initialized yet, make sure you call methods on next instance in test body.'
  287 |         )
  288 |       }

  at Object.get (lib/e2e-utils/index.ts:285:15)
  at Object.renameFolder (production/standalone-mode/basic/index.test.ts:14:16)

● standalone mode - metadata routes › should handle private _next unmatched route correctly

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● standalone mode - metadata routes › should handle private _next unmatched route correctly

next instance is not initialized yet, make sure you call methods on next instance in test body.

  283 |     get: function (_target, property) {
  284 |       if (!next) {
> 285 |         throw new Error(
      |               ^
  286 |           'next instance is not initialized yet, make sure you call methods on next instance in test body.'
  287 |         )
  288 |       }

  at Object.get (lib/e2e-utils/index.ts:285:15)
  at Object.renameFolder (production/standalone-mode/basic/index.test.ts:14:16)

● standalone mode - metadata routes › should handle pages rendering correctly

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● standalone mode - metadata routes › should handle pages rendering correctly

next instance is not initialized yet, make sure you call methods on next instance in test body.

  283 |     get: function (_target, property) {
  284 |       if (!next) {
> 285 |         throw new Error(
      |               ^
  286 |           'next instance is not initialized yet, make sure you call methods on next instance in test body.'
  287 |         )
  288 |       }

  at Object.get (lib/e2e-utils/index.ts:285:15)
  at Object.renameFolder (production/standalone-mode/basic/index.test.ts:14:16)

pnpm test-start-turbo test/e2e/twoslash/standalone.test.ts (turbopack) (job)

output: standalone with twoslash > should annotate twoslash types default (DD)
output: standalone with twoslash > should annotate twoslash types esnext (DD)

Expand output

● output: standalone with twoslash › should annotate twoslash types default

thrown: "Exceeded timeout of 120000 ms for a hook.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  30 |     let tmpFolder: string
  31 |
> 32 |     beforeAll(async () => {
     |     ^
  33 |       await next.patchFile(
  34 |         'next.config.js',
  35 |         (await next.readFile('next.config.js')).replace('// output', 'output')

  at beforeAll (e2e/twoslash/standalone.test.ts:32:5)
  at Object.describe (e2e/twoslash/standalone.test.ts:15:3)

● output: standalone with twoslash › should annotate twoslash types esnext

thrown: "Exceeded timeout of 120000 ms for a hook.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  30 |     let tmpFolder: string
  31 |
> 32 |     beforeAll(async () => {
     |     ^
  33 |       await next.patchFile(
  34 |         'next.config.js',
  35 |         (await next.readFile('next.config.js')).replace('// output', 'output')

  at beforeAll (e2e/twoslash/standalone.test.ts:32:5)
  at Object.describe (e2e/twoslash/standalone.test.ts:15:3)

pnpm test-start test/e2e/app-dir/segment-cache/prefetch-runtime/prefetch-runtime.test.ts (job)

runtime prefetching > passed to a public cache > can completely prefetch a page that uses cookies and no uncached IO (DD)

Expand output

● runtime prefetching › passed to a public cache › can completely prefetch a page that uses cookies and no uncached IO

apiRequestContext.fetch: read ECONNRESET
Call log:
  - → GET http://localhost:35465/passed-to-public-cache/cookies-only?_rsc=gtqjj
  -   user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/130.0.6723.31 Safari/537.36
  -   accept: */*
  -   accept-encoding: gzip,deflate,br
  -   cookie: testCookie=initialValue
  -   next-test-fetch-priority: low
  -   referer: http://localhost:35465/
  -   next-router-prefetch: 1
  -   next-router-segment-prefetch: /!KGRlZmF1bHQp/passed-to-public-cache
  -   next-url: /
  -   rsc: 1
  -   sec-ch-ua: "Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"
  -   sec-ch-ua-mobile: ?0
  -   sec-ch-ua-platform: "Linux"

  225 |             // server; we pass the request to the server the immediately.
  226 |             result: (async () => {
> 227 |               const originalResponse = await page.request.fetch(request, {
      |                                                           ^
  228 |                 maxRedirects: 0,
  229 |               })
  230 |

  at fetch (lib/router-act.ts:227:59)
  at lib/router-act.ts:245:13
  at routeHandler (lib/router-act.ts:257:7)

● runtime prefetching › passed to a public cache › can completely prefetch a page that uses cookies and no uncached IO

apiRequestContext.fetch: read ECONNRESET
Call log:
  - → GET http://localhost:35465/passed-to-public-cache/cookies-only?_rsc=gtqjj
  -   user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/130.0.6723.31 Safari/537.36
  -   accept: */*
  -   accept-encoding: gzip,deflate,br
  -   cookie: testCookie=initialValue
  -   next-test-fetch-priority: low
  -   referer: http://localhost:35465/
  -   next-router-prefetch: 1
  -   next-router-segment-prefetch: /!KGRlZmF1bHQp/passed-to-public-cache
  -   next-url: /
  -   rsc: 1
  -   sec-ch-ua: "Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99"
  -   sec-ch-ua-mobile: ?0
  -   sec-ch-ua-platform: "Linux"

  225 |             // server; we pass the request to the server the immediately.
  226 |             result: (async () => {
> 227 |               const originalResponse = await page.request.fetch(request, {
      |                                                           ^
  228 |                 maxRedirects: 0,
  229 |               })
  230 |

  at fetch (lib/router-act.ts:227:59)
  at lib/router-act.ts:245:13
  at routeHandler (lib/router-act.ts:257:7)

pnpm test-start-turbo test/e2e/og-api/index.test.ts (turbopack) (job)

pnpm support > should build with dependencies installed via pnpm (DD)
pnpm support > should execute client-side JS on each page in output: "standalone" (DD)

Expand output

● pnpm support › should build with dependencies installed via pnpm

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

● pnpm support › should execute client-side JS on each page in output: "standalone"

next build failed with code/signal 1

  77 |             if (code || signal)
  78 |               reject(
> 79 |                 new Error(
     |                 ^
  80 |                   `next build failed with code/signal ${code || signal}`
  81 |                 )
  82 |               )

  at ChildProcess.<anonymous> (lib/next-modes/next-start.ts:79:17)

codspeed-hq · 2026-02-07T07:50:55Z

Merging this PR will not alter performance

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks¹

_{Comparing json_modules (808696f) with import_with_type_text_turbopack (4f31ce0)²}

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. ↩
No successful run was found on import_with_type_text_turbopack (6194f5d) during the generation of this report, so 6264c6d was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

nextjs-bot · 2026-02-07T07:51:14Z

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	455ms	✓	▁█▁▁▁
Cold (Ready in log)	436ms	436ms	✓	▂█▁▁▂
Cold (First Request)	1.179s	1.156s	✓	▃█▄▁▃
Warm (Listen)	456ms	456ms	✓	▁█▁▁▁
Warm (Ready in log)	439ms	440ms	✓	▁█▁▁▁
Warm (First Request)	338ms	339ms	✓	▂█▂▁▁

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	455ms	✓	▁▅▁▁▁
Cold (Ready in log)	438ms	438ms	✓	▅▅▄▁▁
Cold (First Request)	1.853s	1.849s	✓	▃▄▃▁▁
Warm (Listen)	455ms	455ms	✓	▁▄▁▁▁
Warm (Ready in log)	437ms	438ms	✓	▃▄▅▁▁
Warm (First Request)	1.843s	1.849s	✓	▂▄▃▁▁

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	3.908s	3.856s	✓	▁█▁▁▁
Cached Build	3.975s	3.936s	✓	▁█▁▁▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.916s	13.849s	✓	▁▄▂▁▁
Cached Build	13.903s	13.933s	✓	▁▃▂▁▁
node_modules Size	467 MB	467 MB	✓	█████

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **437 kB** → **437 kB** ⚠️ +13 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	766 B	762 B	✓
Total	766 B	762 B	✅ -4 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	451 B	450 B	✓
Total	451 B	450 B	✅ -1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.47 kB	N/A	-
6280-HASH.js gzip	56.9 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.53 kB	N/A	-
e8aec2e4-HASH.js gzip	62.5 kB	N/A	-
framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	256 B	253 B	🟢 3 B (-1%)
main-HASH.js gzip	39.1 kB	39.1 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
262-HASH.js gzip	N/A	4.52 kB	-
2889.HASH.js gzip	N/A	169 B	-
5602-HASH.js gzip	N/A	5.48 kB	-
6948ada0-HASH.js gzip	N/A	62.5 kB	-
9544-HASH.js gzip	N/A	57.5 kB	-
Total	230 kB	231 kB	⚠️ +612 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	194 B	✓
_error-HASH.js gzip	183 B	180 B	🟢 3 B (-2%)
css-HASH.js gzip	331 B	330 B	✓
dynamic-HASH.js gzip	1.81 kB	1.81 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	351 B	352 B	✓
hooks-HASH.js gzip	384 B	383 B	✓
image-HASH.js gzip	580 B	581 B	✓
index-HASH.js gzip	260 B	260 B	✓
link-HASH.js gzip	2.49 kB	2.49 kB	✓
routerDirect..HASH.js gzip	320 B	319 B	✓
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	315 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.97 kB	✅ -1 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	126 kB	126 kB	✓
page.js gzip	249 kB	249 kB	✓
Total	375 kB	375 kB	⚠️ +497 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	616 B	617 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	33.3 kB	33 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.9 kB	34.6 kB	✅ -323 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	732 B	736 B	✓
Total	732 B	736 B	⚠️ +4 B

Build Cache

	Canary	PR	Change
0.pack gzip	3.84 MB	3.85 MB	🔴 +13.3 kB (+0%)
index.pack gzip	103 kB	104 kB	✓
index.pack.old gzip	103 kB	103 kB	✓
Total	4.05 MB	4.06 MB	⚠️ +14.3 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	315 kB	315 kB	✓
app-page-exp..prod.js gzip	167 kB	167 kB	✓
app-page-tur...dev.js gzip	315 kB	315 kB	✓
app-page-tur..prod.js gzip	167 kB	167 kB	✓
app-page-tur...dev.js gzip	312 kB	312 kB	✓
app-page-tur..prod.js gzip	165 kB	165 kB	✓
app-page.run...dev.js gzip	312 kB	312 kB	✓
app-page.run..prod.js gzip	165 kB	165 kB	✓
app-route-ex...dev.js gzip	70.5 kB	70.5 kB	✓
app-route-ex..prod.js gzip	49 kB	49 kB	✓
app-route-tu...dev.js gzip	70.5 kB	70.5 kB	✓
app-route-tu..prod.js gzip	49 kB	49 kB	✓
app-route-tu...dev.js gzip	70.1 kB	70.1 kB	✓
app-route-tu..prod.js gzip	48.8 kB	48.8 kB	✓
app-route.ru...dev.js gzip	70.1 kB	70.1 kB	✓
app-route.ru..prod.js gzip	48.7 kB	48.7 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	43.2 kB	43.2 kB	✓
pages-api-tu..prod.js gzip	32.9 kB	32.9 kB	✓
pages-api.ru...dev.js gzip	43.1 kB	43.1 kB	✓
pages-api.ru..prod.js gzip	32.8 kB	32.8 kB	✓
pages-turbo....dev.js gzip	52.5 kB	52.5 kB	✓
pages-turbo...prod.js gzip	39.4 kB	39.4 kB	✓
pages.runtim...dev.js gzip	52.5 kB	52.5 kB	✓
pages.runtim..prod.js gzip	39.3 kB	39.3 kB	✓
server.runti..prod.js gzip	62.7 kB	62.7 kB	✓
Total	2.8 MB	2.8 MB	✓

… fix it to be

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Feb 7, 2026

lukesandberg mentioned this pull request Feb 7, 2026

Add support for with type text under a new experimental flag, following what webpack did #89560

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vercel bot reviewed Feb 7, 2026

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turbopack/crates/turbopack-ecmascript/src/bytes_source_transform.rs Outdated Show resolved Hide resolved

lukesandberg changed the title ~~Simplify how json imports workby turning it into a source transform fix it to be~~ Simplify how json imports workby turning it into a source transform Feb 7, 2026

lukesandberg force-pushed the json_modules branch from 5895894 to 37d3f07 Compare February 7, 2026 08:02

lukesandberg force-pushed the import_with_type_text_turbopack branch from f5b9826 to 4f31ce0 Compare February 7, 2026 08:02

Simplify how json imports workby turning it into a source transform…

808696f

… fix it to be

lukesandberg force-pushed the json_modules branch from 37d3f07 to 808696f Compare February 7, 2026 08:10

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Simplify how `json` imports workby turning it into a source transform#89631

Simplify how `json` imports workby turning it into a source transform#89631
lukesandberg wants to merge 1 commit intoimport_with_type_text_turbopackfrom
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Refactor JSON module handling in Turbopack

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Merging this PR will not alter performance

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