When setting the arc theme for applications in gnome-tweaks (with x11-themes/arc-theme-20211018 +gnome-shell +gtk2 +gtk3 +gtk4 +pre-rendered), gnome-chess aborts with the error message "Resource path /org/gnome/arc-theme/assets/titlebutton-minimize.png s not a valid image". This looks like an error that would occur with other gtk4 programs as well (gui-libs/gtk-4.6.0 here) and actually also occurs with the only other gtk4 program on my system, net-libs/gssdp-1.4.0.1 (gssdp-device-sniffer). Reproducible: Always
Fixed by x11-themes/arc-theme-20220105!