bug#39823: 26.3; update-directory-autoloads regression from Emacs 26 to Emacs 27

[Maxim Cournoyer]

Hello Noam,

Noam Postavsky <npostavs@gmail.com> writes:

> Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:
>
>> (defun update-directory-autoloads (&rest dirs)
>>
>> I don't see how &key can be combined with &rest without potentially
>> causing problems.
>
> You can check if the first arg is a keyword like
> :generated-autoload-file (which can't be a directory, since it's not a
> string), and if it is, then handle the second arg specially.

I've given this idea a try with the attached patch.  For some reason I
can't seem to simply eval the definition to test it (Debugger
entered--Lisp error: (void-function byte-compile-info-string).  I'm
rebuilding Emacs with the change right now.

Consider it untested for now.

0001-lisp-autoload.el-Add-a-keyword-argument-to-update-di.patch
Description: Text Data

Thank you!

Maxim