Hello Matija,

> There is a version check in "g-callable-info-make-closure" function,
> if I disable it (check patch) all examples works just fine.

Great! But ...

> I'm not quite sure what these functions does, can you take another
> look?

g-callable-info-make-closure just select in between the appropriate GI
make closure function it must use [1], depending on your GI version:

	>= 1.71.0
	use g-callable-info-create-closure

	otherwise
	use g-callable-info-prepare-closure

> My gi version is 1.80.1.

So your patch seems to point to a problem in the upstream definition of
the (most recent) g-callable-info-create-closure, which is the one
everybody who's using GI >= 1.71.0 should use ...

Your patch 'wrongly' force to still use the (deprecated in 1.72.0)
g-callable-info-prepare-closure function.

Note that, on NixOS  and Guix, it is not the call to
g-callable-info-create-closure that segfault, but the call to the
closure that was made calling g-callable-info-create-closure

Fwiw, I just posted an explanation of this problem in the matrix room
#introspection:gnome.org, asking if anyone has an idea ... but i very
much doubt they will answer.

Do you (or anyone else interested ofc) have an idea of why would
g-callable-info-create-closure perfectly create a closure pointer on
debian, and not on guix/nix? Here is the upstream code def [2]

Thanks,
David

[1]	note that this code precedes the fact that g-golf now depends
on GI >= 1.72.0, for some other reason - so technically, i could have
removed g-callable-info-make-closure and always use
g-callable-info-create-closure ... fortunately for guix/nix, till will
find a real fix, i left this 'inoffensive' code in g-golf core ... 

[2] 

g_callable_info_create_closure

	https://salsa.debian.org/gnome-team/gobject-introspection/-/blob/debian/latest/girepository/girffi.c?ref_type=heads#L355


g_callable_info_prepare_closure

	https://salsa.debian.org/gnome-team/gobject-introspection/-/blob/debian/latest/girepository/girffi.c?ref_type=heads#L447