Memory leak and unresponsive app when using bind and key block on same variable

[sriramk1n1]

Describe the bug

Is this expected behaviour? There is no reason to use bind within key block like this, I accidentally used it, this leads to app being completely unresponsive and memory completely fills within minutes.

Reproduction

app.svelte:

<script>
  import Comp from "./component.svelte"
  let arr=Array(10).fill(0);
</script>

{#key arr}
    <Comp bind:arr />
{/key}

component.svelte:

<script>
    export let arr;
<script>
{arr.length}

Logs

No response

System Info

Binaries:
    Node: 20.5.1 - /usr/bin/node
    npm: 9.8.1 - /usr/bin/npm
  Browsers:
    Chromium: 115.0.5790.102
  npmPackages:
    @sveltejs/adapter-auto: ^2.0.0 => 2.1.0 
    @sveltejs/kit: ^1.20.4 => 1.24.0 
    svelte: ^4.0.5 => 4.2.0 
    vite: ^4.4.2 => 4.4.9

Severity

annoyance

Additional Information

No response

[Prinzhorn]

There is no reason to use bind within key block like this

Then don't 😄

It's essentially creating some sort of infinite reactive loop, the underlying bug likely being #5689 because otherwise there is no reason for arr to be invalidated in this scenario.