Subject: 27.0.50; ediff-directories() ends up with a wrong-type-argument lisp error
From: Markus Weber <[email-masked]>
To: [email-masked]
Date: Tue, 18 Jun 2019 11:58:36 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

Hi,

probably with commit 963d4e2, ediff.el seems to be mixed up.

Reproducible: always, with current builds on Debian and mingw-w64.

Stack:
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>  string-match("^/tmp_mnt/" nil)
>  abbreviate-file-name(nil)
>  ediff-abbreviate-file-name(nil)
>  ediff-draw-dir-diffs(((#<buffer *Ediff Session Group Panel<2>*>)))
>  ...

Many thanks!