Comment # 1 on bug 899776 from Atri Bhattacharya

Hi Gerald!
gtk_application_get_menu_by_id is a new function introduced in gtk+ 3.14 [1].
What is the version of gtk on your system?

The issue you see is probably because gnome-clocks 3.14 cannot work without
gtk+ 3.14, and possibly other GNOME/gtk libraries that are part of the 3.14
upgrade. Upgrading individual pieces rather than the entire GNOME stack to
version 3.14 at once is likely to cause such issues.

[1]
https://developer.gnome.org/gtk3/unstable/GtkApplication.html#gtk-application-get-menu-by-id