GNU bug report logs - #56443
28.1; Mac segmentation fault with ffap

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Message #23 received at 56443 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Mattias Engdegård <mattiase <at> acm.org>
Cc: sje30 <at> cam.ac.uk, 56443 <at> debbugs.gnu.org, mardani29 <at> yahoo.es
Subject: Re: bug#56443: 28.1; Mac segmentation fault with ffap
Date: Fri, 08 Jul 2022 13:45:44 +0300

> From: Mattias Engdegård <mattiase <at> acm.org>
> Date: Fri, 8 Jul 2022 11:35:27 +0200
> Cc: Daniel Martín <mardani29 <at> yahoo.es>, 56443 <at> debbugs.gnu.org,
>         sje30 <at> cam.ac.uk
> 
> The call to file_name_directory returns nil (the argument being "mailto:sje30 <at> cam.ac.uk"). What about:
> 
> @@ -2603,7 +2603,7 @@ DEFUN ("file-name-case-insensitive-p", Ffile_name_case_insensitive_p,
>        Lisp_Object parent = file_name_directory (filename);
>        /* Avoid infinite loop if the root has trouble
>          (impossible?).  */
> -      if (!NILP (Fstring_equal (parent, filename)))
> +      if (!STRINGP (parent) || !NILP (Fstring_equal (parent, filename)))
>         return Qnil;
>        filename = parent;
>      }

Fine with me, but please update the comment to this effect.

But why does the original call to file_name_case_insensitive_err fail
in this case with err > 0 on macOS, and what is the value of err?

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