CC-5867: Can't edit show instance

airtime_mvc/application/services/ShowService.php

@@ -1039,6 +1039,9 @@ SQL;
                 );
                 $origStartDateTime->setTimezone(new DateTimeZone("UTC"));
                 $ccShowInstance = $this->getInstance($origStartDateTime);
+                if (!$ccShowInstance) {
+                    throw new Exception("Could not find show instance with start time: ".$origStartDateTime->format("Y-m-d H:i:s"));
+                }
             }
 
             $ccShowInstance->setDbShowId($this->ccShow->getDbId());