Selected <select> value disappears in svelte 3.42.2

[icalvin102]

Describe the bug

<select> elements that should have a selected option appear blank after the update to 3.42.2

This only happens (to me at least) if the select is inside a component that has store props passed to it.

I am aware of the change proposed in #6126 and implemented by #6170 but it seems that this is not the root cause of this issue but rather brings to light a underlying problem.

I have tried adding console.log(value) to select_option function in svelte/src/runtime/internal/dom.ts#L536
and It logged undefined with the code shown in the REPL.

Reproduction

https://svelte.dev/repl/6ab9575cda57439a83652811ecfd7d8c?version=3.42.2

Logs

No response

System Info

Brave Version 1.26.74 Chromium: 91.0.4472.124 (Official Build) (64-bit) on Arch Linux

Severity

blocking an upgrade

[jakob-kruse]

I just randomly stumbled across this. The disappearing stops once you remove {...$restProps}. Maybe this helps in some way

[baseballyama]

Sorry for the wrong mention.
Please ignore the mentioned.

[Conduitry]

This should be fixed in 3.42.4 - https://svelte.dev/repl/6ab9575cda57439a83652811ecfd7d8c?version=3.42.4