Re: Is it ok to sort a list of overlays destructively?

[John Yates]

On Wed, Jul 28, 2021 at 7:44 AM Eli Zaretskii <eliz@gnu.org> wrote:
>
> Basically, you should assume that Emacs protects itself where that is
> needed, so if it handed you a list or some other data, and nothing in
> the doc string warns you against doing something with that data, you
> are free to do that, and if that causes unexpected results, there's
> either a documentation bug or a code bug that needs to be fixed.

I am not sure if such a statement exists in any of the manuals. Should
it not be stated explicitly somewhere?