Bug#885023: Acknowledgement (gnome-shell: spams syslog with "e_cal_recur_generate_instances_sync: assertion 'icaltime_compare (interval_start, interval_end) < 0' failed")

[Martin Bergström]

Bug resolved when upgrading evolution to 3.26.3-1 and/or 
evolution-data-server to 3.26.3-4 when they entered testing.

So problem resolved.
/Martin