On Wed, 19 Feb 2020, 04:27 Eli Zaretskii, <eliz@gnu.org> wrote:

> I thought in the scenario we are discussing there will be no bitmaps
> shown at all, since the scenario disables the fringes.  Isn't that so?
>

If the user turns fringe-mode back on, diff-hl will use the previously
created bitmaps, which will be width 1 if define-fringe-bitmap decides to
use that instead of zero, or will crash if x_cr_define_fringe_bitmap does
not define the bitmap when width == 0

Maybe signaling an error is best :-)

>