Uncommenting indented code is broken for vim9script

[noscript]

Commenting Vim9 code works, but uncommenting it does nothing.
Only happens for indented code.

2022-06-29_18-16-10.mp4

[alerque]

What is the declared ft for vim9script?

Does it allow mixing and mating of old style vimL comments in the same file?

[noscript]

What is the declared ft for vim9script?

vim

Does it allow mixing and mating of old style vimL comments in the same file?

If the first line is vim9script then only new style is allowed.

[alerque]

Are you kidding me? VIM is using the same filetype for it's old vimscript and new vim9script languages that are completely different languages with incompatible SYNTAX?

[alerque]

Is there some other vim setting that gets set reliably that we could use to trigger different rules? How do VIM syntax highlighters handle this?

[noscript]

They can be distinguished by commentstring. New style is #%s, old one is "%s.