Svelte errors are not forwarded to user

[Its-Just-Nans]

Astro Info

All astro versions

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

Hello,

Here is the reproduction https://stackblitz.com/edit/github-asymdn

The example show that with a svelte component using client:only, if there are errors (even an "obvious" one like ee is not defined, we don't have clear instructions.

We just have

[HMR][Svelte] Unrecoverable HMR error in <Test>: next update will trigger a full reload

Or sometimes (in a personal project for example) :

• the page crash
• the error is displayed
• but if I reload the page, it crashes again but with [HMR][Svelte] Unrecoverable HMR error in <Test>: next update will trigger a full reload with only error

But with client:visible we have a Error Boundary

What's the expected result?

Have a Error boundary each time OR at least have the error in the console

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-asymdn

Participation

• I am willing to submit a pull request for this issue.

[Its-Just-Nans]

Note that I though it would be svelte-hmr but it's not

sveltejs/svelte-hmr#86

[lilnasy]

I see a helpful error from your reproduction. Is it only missing errors with client:only?

[lilnasy]

I notice that the error is being eaten up here:

astro/packages/integrations/svelte/client.js

Lines 29 to 30 in 4d1274c

	} catch (e) {
	} finally {