[Bug]: Custom SWC loader crashes on ^0.7.3 about rspack

[h-a-n-a]

In the release artifact, which you've been using, symbols are stripped. This results in the backtrace or the stack telling nothing useful for debugging. Would you please try to reproduce it so we can proceed?

[h-a-n-a]

Great repro! I was able to reproduce it locally. A fix is coming right over.

[github-actions]

Hello @markmssd, sorry we can't investigate the problem further without reproduction demo, please provide a repro demo by forking rspack-repro, or provide a minimal GitHub repository by yourself. Issues labeled by need reproduction will be closed if no activities in 14 days.

[markmssd]

Ah ok. I'll keep trying. So far I noticed that by using the builtin swc, it's working, and it crashes or hangs only when using our own (by using require.resolve). Not sure if that's related, but I did see an upgrade of swc_core in Rspack, so maybe? I'll re-update once I have a repro.

[markmssd]

Alright so using a custom loader, I was indeed able to reproduce it: https://github.com/markmssd/rspack-hmr-performance-regression/tree/swc-custom-loader!

• This repro uses Rspack 0.7.3, but it's the same with 0.7.4-canary
• Downgrading to Rspack 0.7.2 works without problem
• On 0.7.3, if you use the builtin loader (uncomment here and comment the one below it), it also works
• In this repro, I haven't used the latest SWC/SWC Helpers version, but it's the same with latests
• In this repro, I get a different error than in my personal project, possibly because it's different code and crashes at a different place, but it's crashing as expected.

Steps to reproduce:

git clone https://github.com/markmssd/rspack-hmr-performance-regression/tree/swc-custom-loader
cd rspack-hmr-performance-regression
npm install --force
npm start

Let me know if I can provide anything more to help!

[markmssd]

Thanks @h-a-n-a ! 🚀 I'll wait for the next release to re-test it (issue is still happening with 0.7.4-canary-bdc2037-20240617004808, so I guess it doesn't include this fix yet)