Re: lexical-binding is turned on in more use cases

[Noam Postavsky]

On Tue, 10 Mar 2020 at 22:02, Michael Heerdegen
<address@hidden> wrote:

> > Essentially some cc-mode variables are only declared dynamic locally
> > within individual files. Without lexical binding the only difference
> > this causes is that they are unbound at top level; but with
> > lexical-binding, outside of the declaring files (e.g., in M-:
> > expressions), let-binding those variables doesn't bind the value
> > dynamically.
>
> I meant "real" examples (that are not actually coding errors).

Whether or not there is a coding error in the above is a somewhat
philosophical question.

> like let-binding a variable that is not (yet) declared around an
> expression whose evaluation will autoload the declaration but it's too
> late for that binding and you get something unexpected.

But I just realized Bug#39823 is an example of exactly this.

https://debbugs.gnu.org/39823 "update-directory-autoloads regression
from Emacs 26 to Emacs 27"