bug#59802: 30.0.50; Checkbox button not rendered

[Manuel Giraud]

Eli Zaretskii <eliz@gnu.org> writes:

[...]

> I think it would be useful if you could post a complete recipe,

The recipe is this one (lots of checkboxes):
--8<---------------cut here---------------start------------->8---
emacs -Q --eval="(customize-face 'default)"
--8<---------------cut here---------------end--------------->8---

> and perhaps also catch this error in a debugger, so you could show the
> full image spec including the allegedly invalid size.

There is no real error, but SVG checkboxes not showing (most of the
time).  How could I catch this?

Thanks.
-- 
Manuel Giraud