Crash in __gio_xdg_cache_mime_type_subclass (2.78)
The fix for #3191 (closed) (b097adf1) was not backported to 2.78, resulting in 2.78.2 causing crashes in various apps.
Also see https://gitlab.freedesktop.org/xdg/xdgmime/-/issues/37.
Edited by Jan Alexander Steffens