Hello! I can confirm the crash when using , in gnome-calculator 3.12.
It seems to have been introduced with this upstream commit: https://git.gnome.org/browse/gnome-calculator/commit?id=4d64dc9180fd8c54368e26b2da08fcc95f232c10https://git.gnome.org/browse/gnome-calculator/ See: https://git.gnome.org/browse/gnome-calculator/tree/src/math-display.vala#n453 Gtk.TextBuffer text_buffer = context.get_iter ().get_buffer (); get_iter() here seems to return a pointer to an iter-struct with all fields set to 0x0. When this (invalid?) iter is passed to get_buffer () it crashes. Note that several critical warnings has been issued before reaching this crash. Also note that reverting the change doesn't make ',' usable. See upstream bug- reports about introducing support for using ',' as a decimal separator. Regards, Andreas Henriksson -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org