Svelte 5: Spotted a regression related to props forwarding

[michael]

Describe the bug

In multiple situations forwarding props {...rest} through 2 components broke certain behaviours.

I reproduced a case where bind:ref in the outermost parent component stopped working as soon as I used props forwarding via ...rest. It was working fine with 5.0.0-next.17 but stopped working after upgrading to 5.0.0-next.26.

Reproduction

See this REPL

Logs

No response

System Info

5.0.0-next.26

Severity

blocking an upgrade

[dummdidumm]

I'd say this is expected behavior. Spreading works one way, not two-way (I'm suprised this worked at some point). To fix it, use bind:ref in the middle child explicitly - although there's an infinite loop when $inspect is commented in, which is why I'm keeping this issue open.

[dummdidumm]

Closing in favor of #10174