https://bugs.winehq.org/show_bug.cgi?id=48489
--- Comment #1 from Vincent Povirk madewokherd@gmail.com --- Seems like they expect to be able to do pointer equality tests: https://github.com/dotnet/runtime/blob/master/src/libraries/System.Drawing.C...
That would imply that clone_font_family should never be used, and FontFamily objects should only be created as part of a FontCollection.