Subject: Re: bug#21895: [PATCH] shr: don't invoke unbound function (Bug#21895)

From: martin rudalics <[email-masked]>
Date: Fri, 13 Nov 2015 09:04:37 +0100

> +(defun fringes-p ()
 > +  "Return t if fringe-columns is bound, and either (fringe-columns 'left)
 > or (fringe-columns 'right) returns nonzero."
 > +  (and (fboundp 'fringe-columns)
 > +       (or (not (zerop (fringe-columns 'right)))
 > +           (not (zerop (fringe-columns 'left))))))
 > +

This is wrong when ‘fringe-columns’ is unbound and a fringe is present.
The right solution is to

(require 'fringe)

in ‘shr-mode’ as you proposed earlier.

martin