https://bugs.winehq.org/show_bug.cgi?id=57306
--- Comment #72 from Rafał Mużyło galtgendo@o2.pl ---
We're not in draw_arc there.
my bad - get_arc_points/get_arc_max_points is called from there too, though.
I think I'm going down the same rabbit hole, you did from comment 53 onwards...
See you on the other side.