Issue with WebContainers + Vite + Sveltekit and server errors crashing dev server

[paoloricciuti]

Describe the bug

Sveltekit + Vite + Webcontainers problem

This issue comes up when there's some server error in sveltekit. Inside the webcontainer the dev server crashes immediately with a cryptic error

Error: `line` must be greater than 0 (lines start at line 1)
    at originalPositionFor$1 (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:10179:19)
    at eval (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55836:25)
    at eval (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55827:21)
    at ssrRewriteStacktrace (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55826:10)
    at Object.ssrRewriteStacktrace (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:65063:20)
    at fix_stack_trace (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/@sveltejs/kit/src/exports/vite/dev/index.js:269:23)
    at eval (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/@sveltejs/kit/src/exports/vite/dev/index.js:542:13)

This usually happens when vite calls ssrRewriteStacktrace twice see here

Now, if you start a brand new project locally or even download this stackblitz project you can see that having an error in page.js doesn't crash the dev server while the same things happens if you run it in Webcontainers (it happens on stackblitz and on sveltelab)

Is there something that can be done to prevent this?

Link to the blitz that caused the error

https://stackblitz.com/edit/sveltejs-kit-template-default-gncrwp?file=README.md

Steps to reproduce

1. Go on https://stackblitz.com/edit/sveltejs-kit-template-default-gncrwp?file=README.md
2. Wait for the server to load and see it crash

Expected behavior

The dev server should not crash but rather sveltekit should show a 500 page

Parity with Local

• I have run the project in my local machine and I could not reproduce the issue.

Screenshots

No response

Platform

• OS: macOS
• Browser: Arc but it should happen in other places too

Additional context

It started happen not so long ago

[Nemikolh]

Hi @paoloricciuti! 👋

I've opened your blitz and I'm getting a different error:

Internal server error: Parse failure: Unexpected token (6:12)
At file: /src/routes/+page.js
Contents of line 6:     failing here;
      at ssrTransformScript (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55395:15)
      at ssrTransform (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55370:12)
      at Object.ssrTransform (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:65044:20)
      at loadAndTransform (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55041:24)
      at async instantiateModule (/home/projects/sveltejs-kit-template-default-gncrwp/node_modules/vite/dist/node/chunks/dep-df561101.js:55927:10)

The server does not crash either (I'm in Chrome). I've tried with older version of WebContainer (2 weeks older than this issue) and I get the same thing.

Have you perhaps modified the blitz? Or could this be an issue only in Arc?

[paoloricciuti]

https://stackblitz.com/edit/sveltejs-kit-template-default-gncrwp?file=README.md

Mmm i swear it gave me the correct error before...btw i've updated it now bu throwing an error inside the load function and now it's back to be the error i reported

[paoloricciuti]

This seems to have been resolved by this

sveltejs/kit#10769

[eltigerchino]

It's back :(
https://stackblitz.com/edit/sveltejs-kit-template-default-isgfry?file=src%2Froutes%2F%2Bpage.svelte

Error: `line` must be greater than 0 (lines start at line 1)
    at originalPositionFor$1 (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:10179:19)
    at eval (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:55912:25)
    at eval (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:55903:21)
    at ssrRewriteStacktrace (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:55902:10)
    at ssrFixStacktrace (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:55955:24)
    at Object.ssrFixStacktrace (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/vite/dist/node/chunks/dep-bb8a8339.js:65145:13)
    at fix_stack_trace (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/@sveltejs/kit/src/exports/vite/dev/index.js:273:8)
    at eval (/home/projects/sveltejs-kit-template-default-isgfry/node_modules/@sveltejs/kit/src/exports/vite/dev/index.js:547:13)