How can I trigger a "Failed to update prerender cache" error?

[thomaux]

Summary

We've had an issue in production where page requests were returning stale data. Upon inspecting the logs, we noticed this error getting logged when loading the page:

Failed to update prerender cache for /PAGE TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined

We believe this error was causing our problem, however I would like to be able to reproduce this scenario locally. Does anyone know how I can trigger this error? The page in question has no server side or static props.

Many thanks in advance!

Additional information

No response

Example

No response

[icyJoseph]

So, this code happens on this try catch,

next.js/packages/next/src/server/lib/incremental-cache/index.ts

Line 594 in 645ef16

console.warn('Failed to update prerender cache for', pathname, error)

      await this.cacheHandler?.set(pathname, data, ctx)

So, I could speculate, that a fetch all, or data request in general, resolved to undefined, rather than null, for a given missing value?

[beatrizdemiguelperez]

Same here, did you find something?

[thomaux]

Unfortunately no way to reproduce the issue, however the root cause was due to a vulnerability in the next version we were using.

This is the vulnerability: GHSA-gp8f-8m3g-qvj9.

[icyJoseph]

Ufff... do you think you might have been attacked?