Update being skipped in slot

[AaronAtP123]

Describe the bug

Some variable assignments in reactive blocks are causing some updates not to be rendered

Reproduction

https://svelte.dev/repl/5114b7068716419d9ff825e7ef762c77

The linked REPL has component App which increments variable a, containing <Comp1 {a} bind:b>, and Comp1 pushes changes back to b via $: b = a;'.

Expected behavior: The page should always show the same number 3 times.
Actual behavior: The first number remains 0, and the other two update properly.

Logs

No response

System Info

System:
  OS: Windows 10 10.0.19045
  CPU: (16) x64 Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz
  Memory: 5.19 GB / 13.62 GB
Binaries:
  Node: 18.12.1 - C:\Program Files\nodejs\node.EXE       
  npm: 8.19.2 - C:\Program Files\nodejs\npm.CMD
Browsers:
  Edge: Chromium (124.0.2478.105)
  Internet Explorer: 11.0.19041.4355
npmPackages:
  rollup: ^4.9.6 => 4.14.0
  svelte: ^4.2.9 => 4.2.12

Severity

annoyance

[7nik]

I believe it's a duplicate of #7913 and non-fixable in Svelte 3/4.

[dummdidumm]

That's correct. It works in Svelte 5, therefore closing.