`geom_mark_ellipse` example triggers error on MacOS

[Wenjun-Liu]

Hi,

Thanks for creating such a powerful and helpful package.

I have been using ggforce for a while and it worked absolutely great until recently, when every time I tried to add labels to the ellipses, it would throw an error. For example, the example from the help page of the function triggers an error: "Problem while converting geom to grob. Caused by error in match_font_c() :! bad value".

I can see the systemfonts package got updated recently (on 9 Oct 2023). Any chance that could have caused the error?

I was using ggforce 0.4.1.

Cheers, Nora

[thomasp85]

It is indeed a systemfonts error but it is one I haven't seen before and is hard to debug without a reproducible example