made an issue in github
https://github.com/vercel/next.js/issues/77268

Hey @Mugger Crocodile 👋 We used to work at Atlassian together in AFP (I'm Max Puckeridge).
I was hoping to get some help to do with bundling. There is this issue above to do with webpack i think.
I've also tried playing with your rspack example on canary but ran into errors. Anything you can do to help us get to 15 and not have a bundle size hit would be appreciated 🙏

actually, i tried rspack in the issue repo, and it does work, and gets firebase to 59kb

i'm not entirely sure we can use rspack anyway, as we use sentry webpack plugin and withPWA in our next config

Oh hey Max! I’m not super familiar with the webpack change that led to this but I’ll see if I can get you in touch with someone who is

Have you tried Rspack and it didn’t work? They’re api compatible for the most part but there are a few gaps

yeah, i just tried rspack again today and seems to be better after the rename

i just got a succesful build in our actual app, and the bundle diff is smaller

but i definitely did see some build errors when using the sentry webpack plugin that uploads sourcemaps for example

kdy1 thought it was this change?
https://github.com/vercel/next.js/issues/77268#issuecomment-2760253370
is it possible to tell next which version of webpack to use?

Unfortunately not, we bundle a compiled version of webpack

With your reproduction and a Next checkout from source someone could bisect the version of webpack that introduced it

Mind posting this to https://github.com/vercel/next.js/discussions/77800? Probably a significant issue for folks

ah ok, ill definitely check out our withPWA and withSentryWebpackPlugin a bit more

see if either can work with rspack in some way

or do you mean about the webpack issue?

sorry, the issue using the sentry plugin if it shows up when you start using Rspack

ah yeah. ok. i can share that for sure