Merge pull request #567 from gemini-hlsw/GSCHED-822-scheduler-is-not-responding-for-long-plans

Some nights cycle.py run method while loop never ends

Author: dngomez

scheduler/core/events/cycle/cycle.py

@@ -375,6 +375,10 @@ def run(self, site: Site, night_idx: NightIndex, nightly_timeline: NightlyTimeli
             # Advance the current time.
             current_timeslot += 1
 
+            if next_event_timeslot < current_timeslot:
+                _logger.error(f'Next event timeslot {next_event_timeslot} is before current timeslot {current_timeslot} for site {site_name} on night {night_idx}.')
+                break
+
         self._process_remaining_events(site,
                                        night_idx,
                                        night_events,