GNU bug report logs - #36502
27.0.50; infinite loop in file-name-case-insensitive-p

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Ken Brown <kbrown <at> cornell.edu>
Cc: dan <at> dpsutton.com, npostavs <at> gmail.com, 36502 <at> debbugs.gnu.org
Subject: bug#36502: Fwd: bug#36502: 27.0.50; infinite loop in file-name-case-insensitive-p
Date: Mon, 08 Jul 2019 15:25:27 +0300

> From: Ken Brown <kbrown <at> cornell.edu>
> CC: "npostavs <at> gmail.com" <npostavs <at> gmail.com>, "dan <at> dpsutton.com"
> 	<dan <at> dpsutton.com>, "36502 <at> debbugs.gnu.org" <36502 <at> debbugs.gnu.org>
> Date: Sun, 7 Jul 2019 19:30:00 +0000
> 
> --- a/src/fileio.c
> +++ b/src/fileio.c
> @@ -804,7 +804,11 @@ DEFUN ("expand-file-name", Fexpand_file_name, 
> Sexpand_file_name, 1, 2, 0,
> 
>     /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted.  */
>     if (NILP (default_directory))
> -    default_directory = BVAR (current_buffer, directory);
> +    {
> +      default_directory = BVAR (current_buffer, directory);
> +      if (NILP (Ffile_name_absolute_p (default_directory)))
> +       default_directory = Qnil;
> +    }

Hmm... why nullify it?  Why not simply call expand-file-name
recursively?

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