Improved recurrence handling

Helpers.gs

@@ -178,7 +178,7 @@ function processEvent(event, calendarTz){
  */
 function createEvent(event, calendarTz){
   event.removeProperty('dtstamp');
-  var icalEvent = new ICAL.Event(event);
+  var icalEvent = new ICAL.Event(event, {strictExceptions: true});
   if (onlyFutureEvents && checkSkipEvent(event, icalEvent)){
     return;
   }
@@ -300,7 +300,7 @@ function createEvent(event, calendarTz){
   if (addAlerts){
     var valarms = event.getAllSubcomponents('valarm');
     if (valarms.length == 0){
-      newEvent.reminders = { 'useDefault' : true };
+      newEvent.reminders = { 'useDefault' : true, 'overrides' : []};
     }
     else{
       var overrides = [];

ical.js.gs

@@ -8789,6 +8789,7 @@ ICAL.Event = (function() {
      * @type {ICAL.Event[]}
      */
     exceptions: null,
+    except: [],
 
     /**
      * When true, will verify exceptions are related by their UUID.
@@ -8817,15 +8818,17 @@ ICAL.Event = (function() {
       }
 
       if (this.strictExceptions && obj.uid !== this.uid) {
-        throw new Error('attempted to relate unrelated exception');
+        //throw new Error('attempted to relate unrelated exception');
+      }
+      else{
+        this.except.push(obj);
       }
 
       var id = obj.recurrenceId.toString();
 
       // we don't sort or manage exceptions directly
       // here the recurrence expander handles that.
       this.exceptions[id] = obj;
-      this.except.push(obj);
 
       // index RANGE=THISANDFUTURE exceptions so we can
       // look them up later in getOccurrenceDetails.