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Showing content from https://github.com/vercel/next.js/issues/76395 below:

Cannot read properties of undefined (reading 'stack') · Issue #76395 · vercel/next.js · GitHub

Link to the code that reproduces this issue

https://github.com/talatkuyuk/next15-canary-bug-reproduction

To Reproduce

The app which I provided its link is a bug reproduction for next@15.2.0-canary.57 and still continues in next@15.2.0-canary.70 which is latest canary.

It throws the error below in only development mode, not in production.

The error occurs in the nextjs page (MDX article) related with importing a .mjs react component into MDX. I put another article page to show importing a module/function in MDX works well without problem.

TypeError: Cannot read properties of undefined (reading 'stack')
    at stringify (<anonymous>)
    at stringify (<anonymous>) {
  digest: '3183793578'
}

Actually, there is no problem with the Next.js versions below (All, I tested). Importing a .mjs react component into MDX works well.

Step to produce the error

npm run dev--> open browser and click to articles, and see the error in development mode.

npm run build and npm run start --> open browser and click the articles, see there is NO error in production mode.

Then, install the previous canary version to test it.

npm i -S next@v15.2.0-canary.56
rm -rf .next && npm run dev

and see there is NO error in development and production modes.

Then, install the canary.57 again,

npm i -S next@v15.2.0-canary.57
rm -rf .next && npm run dev

and see the TypeError in development mode.

What is next-mdx-remote-client

The next-mdx-remote-client is a fork of next-mdx-remote, having more features like supporting import statements in MDX.

It works well with all versions of Next.js (13, 14, 15) for one year almost.

Log in the console related with the error

I put it in the end because it is long:

[Error] TypeError: Cannot read properties of undefined (reading 'stack')
resolveErrorDev
processFullStringRow
processFullBinaryRow
progress

The above error occurred in the <Unknown> component. It was handled by the <DevOverlayErrorBoundary> error boundary.
	onCaughtError (error-boundary-callbacks.js:53)
	logCaughtError (react-dom-client.development.js:8138)
	runWithFiberInDEV (react-dom-client.development.js:1474)
	(anonim işlev) (react-dom-client.development.js:8185)
	callCallback (react-dom-client.development.js:4841)
	commitCallbacks (react-dom-client.development.js:4861)
	runWithFiberInDEV (react-dom-client.development.js:1474)
	commitClassCallbacks (react-dom-client.development.js:11062)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12182)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12110)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12105)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12291)
	recursivelyTraverseLayoutEffects (react-dom-client.development.js:13296)
	commitLayoutEffectOnFiber (react-dom-client.development.js:12187)
	flushLayoutEffects (react-dom-client.development.js:17269)
	commitRoot (react-dom-client.development.js:17106)
	commitRootWhenReady (react-dom-client.development.js:16183)
	performWorkOnRoot (react-dom-client.development.js:16087)
	performWorkOnRootViaSchedulerTask (react-dom-client.development.js:17995)
	performWorkUntilDeadline (scheduler.development.js:36)
Current vs. Expected behavior

Expecting no error, and show the article page without problem.

Provide environment information 
Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 24.3.0: Thu Jan  2 20:22:00 PST 2025; root:xnu-11215.81.4~3/RELEASE_X86_64
  Available memory (MB): 16384
  Available CPU cores: 12
Binaries:
  Node: 18.20.5
  npm: 10.8.2
  Yarn: 1.22.22
  pnpm: 10.4.1
Relevant Packages:
  next: 15.2.0-canary.57 // There is a newer canary version (15.2.0-canary.70) available, please upgrade! 
  eslint-config-next: 15.1.7
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.3
Next.js Config:
  output: N/A
Which area(s) are affected? (Select all that apply)

Not sure

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

It throws the error in only development mode in local, not in production.

Saran33, hamster1963, chriskrogh, lukebjerring, ostapenko-me and 27 moreWillem-Jaap, mateonunez, jpmonette and ulisesPicoLove

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