bug#20885: 24.4; Invalid face: linum

[martin rudalics]

> I'm using linum-mode.

‘nlinum-mode’ I suppose.

> At various points (e.g., after M-x speedbar), I
> see "Invalid face: linum". (And the speedbar doesn't come up.)
>
> *Messages* shows "nlinum--face-width: Invalid face: linum".
>
>
>
> In GNU Emacs 24.4.1 (x86_64-pc-linux-gnu, GTK+ Version 3.14.5)
>   of 2015-03-07 on trouble, modified by Debian

This issue has been reported and discussed here

https://lists.gnu.org/archive/html/emacs-devel/2014-09/msg00022.html

and was hopefully fixed for Emacs 25.1.  I have no good idea how to
handle this for your version.

martin