Simple CalendarStore query puts application into infinite loop!?

Question

Hi, I've been looking at adding iCal support to my new application and everything seemed just fine and worked on my Mac OS X 10.6 Snow Leopard development machine without a hitch.

Now it looks like depending on what is in your calendar the very simple query below:

- (NSArray*) fetchCalendarEventsForNext50Minutes {

NSLog(@"fetchCalendarEventsForNext50Minutes");

NSTimeInterval start = [NSDate timeIntervalSinceReferenceDate];

NSDate* startDate = [[NSDate alloc] init];
NSDate* endDate = [startDate addTimeInterval: 50.0 * 60.0];

NSPredicate *eventsForTheNext50Minutes = [CalCalendarStore eventPredicateWithStartDate:startDate endDate:endDate
                                         calendars:[[CalCalendarStore defaultCalendarStore] calendars]];


// Fetch all events for this year
NSArray *events = [[CalCalendarStore defaultCalendarStore] eventsWithPredicate: eventsForTheNext50Minutes];

NSLog( @"fetch took: %f seconds", [NSDate timeIntervalSinceReferenceDate] - start );

return events;

}

produces a beachball thrash even with quite limited events in the calendar store.

Am I missing something crucial here? The code snippet is pretty much exactly from the documentation at:

// Create a predicate to fetch all events for this year
NSInteger year = [[NSCalendarDate date] yearOfCommonEra];
NSDate *startDate = [[NSCalendarDate dateWithYear:year month:1 day:1 hour:0 minute:0     second:0 timeZone:nil] retain];
NSDate *endDate = [[NSCalendarDate dateWithYear:year month:12 day:31 hour:23 minute:59 second:59 timeZone:nil] retain];
NSPredicate *eventsForThisYear = [CalCalendarStore eventPredicateWithStartDate:startDate endDate:endDate
calendars:[[CalCalendarStore defaultCalendarStore] calendars]];

// Fetch all events for this year
NSArray *events = [[CalCalendarStore defaultCalendarStore]     eventsWithPredicate:eventsForThisYear];

It looks like it has something to do with the recurrence rules, but as far as I can see there are no other ways of fetching events from the calendar store anyway.

Has anybody else come across this?

Best regards,

Frank