avoided case when len(ends) < len(starts).

1 files changed, 2 insertions, 2 deletions

diff --git a/program/models.py b/program/models.py
index bac192c..8d415b8 100644
--- a/program/models.py
+++ b/program/models.py
@@ -228,10 +228,10 @@ class ProgramSlot(models.Model):
             byweekday=byweekday_end))
 
         if not old:
-            for k in range(len(starts)):
+            for k in range(min(len(starts), len(ends))):
                 timeslot = TimeSlot.objects.create(programslot=self, start=starts[k], end=ends[k])
         elif self.until > old.until:
-            for k in range(len(starts)):
+            for k in range(min(len(starts), len(ends))):
                 if starts[k].date() > old.until:
                     timeslot = TimeSlot.objects.create(programslot=self, start=starts[k], end=ends[k])