Cannot find variable xxx in if block

[blaumeise20]

Describe the bug

This is related to #7241

When running this code:

<script>
	import Component2 from "./Component2.svelte";
	let val = { foo: "bar", baz: 2 };
</script>

<Component2>
	{@const hi = val.foo}
	{#if val.baz > 1}
		hello {hi}
	{/if}
</Component2>

there is a runtime exception cannot find variable hi, but there are no compilation errors.
To try you have to create an empty file Component2.svelte in the REPL and paste <slot /> into it. Sorry but I didn't manage to save it.

Reproduction

To try you have to create an empty file Component2.svelte in the REPL and paste <slot /> into it. Sorry but I didn't manage to save it.

Logs

Can't find variable: hi

System Info

System:
    OS: macOS 11.6
    CPU: (8) x64 Apple M1
    Memory: 41.08 MB / 8.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 16.3.0 - /usr/local/bin/node
    npm: 7.15.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 98.0.4758.80
    Safari: 14.1.2
  npmPackages:
    svelte: ^3.46.4 => 3.46.4 
    webpack: ^5.68.0 => 5.68.0 

Bug also happens in browser REPL

Severity

annoyance

[baseballyama]

Duplicate of #7189