Hi Aleix,

	i decided to answer separately - and  change the subject line - 
	(a) the guile-cairo related issue, on homebrew, from the
	(b) snapshot related issue, on homebrew as well

	here is the 'subthread' for the guile-cairo related issue, on
	homebrew [1].

> > > Anyways, guile-cairo is fine going back to stable 3.0.9.  

> > Ok, so just to make sure, now both the gtk4/simple-paintable.scm and
> > gtk4/animated-paintable.scm examples work fine on 'your' platform as
> > well?

> Nope, they don't. Sorry, I should have been much more explicit and
> provide more info.

Ok - These are two examples ported from the upstream gtk4-demo, can you
run one or both of these examples? [screenshot attached of the upstream
gt4-demo ui (on debian trixie (current testing)).

If they don't work, please report upstream, if they do work, try to get
a backtrace as well, for the simple-animation.scm example only, let's
try to identify the problem for the simplest one ...

David

[1] fwiw all g-golf gtk-4 examples work fine upstream (debian trixie)
as well as on freebsd.