Error on detach when Node created by subcomponent removed using dom api

[btakita]

This is a demonstration of issue 1 described in #3156 (comment)

To see the error, open the developer console & refresh the page.

The Svelte compiler cannot guarantee that detach will be called on an element attached to the DOM, since an outside script can remove the DOM element before detach is called.

https://svelte.dev/repl/059f8435ba824ac5a87d27060f0b7d66?version=3.6.4

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[dummdidumm]

Closing this due to #6910 which silences the error - that said, manual manipulation of the DOM is almost always the wrong solution and can lead to errors like this. Svelte should be in control of manipulating the DOM.