Out transition blocks update to component props, even when outro is cancelled

[jrouleau]

Describe the bug

If a component is outroing while a prop value is updated, it never receives the updated value, even if the outro is cancelled. This means the child's prop values will be inconsistent and out of sync with the values of the parent where they were passed in.

Reproduction

https://svelte.dev/repl/88c6aeb7daab45519bab0315d38f5d9d?version=3.59.1

Logs

No response

System Info

npmPackages:
  svelte: ^3.59.1 => 3.59.1

Severity

annoyance

[jrouleau]

This may or may not be related to #8351

[soerenmeier]

Just encountered this issue in v4.2.18

[dummdidumm]

The problem of staying out of sync is fixed in Svelte 5. The "problem" of not updating while outroing persists (which may or may not be desirable), and there's another issue for that, therefore closing.