Child combinators crash compiler on elements with spread attributes

[SourceR85]

After the update to 3.28.0 this error breaks svelte:
Win Chrome 85.0.4183.121/node.js 14.11.0:
Cannot read property 'toLowerCase' of null
Firefox 81.0 (64-Bit) reports TypeError: attr.name is null

After some tests in repl I found the source of this crash:
The svelte parser dosn't like CSS-sibling selectors (+, ~) in combination with destructored variables...

REPL:
https://svelte.dev/repl/fe56269d373a462cb363a485ddc7aa09?version=3.28.0

[Conduitry]

This has been fixed in 3.29.0 - https://svelte.dev/repl/fe56269d373a462cb363a485ddc7aa09?version=3.29.0