7bc2f539d0
XKB and GDK both add "internal" bits to GdkModifierType. In C, this typically doesn't cause problems as bitfields are just integers, and there's no validation. However for bindings, it's normal to convert enumerations to "native" enumeration types, which don't support unknown bits. See bug 597292. https://bugzilla.gnome.org/show_bug.cgi?id=634994