Core Data error: _Unwind_Resume called from function _PFFaultHandlerLookupRow in image CoreData

Question

I'm getting this weird error from Core Date and I cant understand why.
The code below is executed when I delete a row of a UITableView.
I pass a string and an object to the method below and it fetches the article in a database table that has that string and has a foreign key to that object. Then I delete that object and reload the table.

- (void)deleteFavorite:(NSString *)link inFolder:(Favorites *)f {
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    NSEntityDescription *favsDecriptor = [NSEntityDescription entityForName:@"Favorites" inManagedObjectContext:context];
    [request setEntity:favsDecriptor];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(belongsTo == %@) AND (link = %@)", f, link];
    [request setPredicate:predicate];

    NSError *error = nil;   
    NSMutableArray *fav = [[NSMutableArray alloc] init];
    fav = [[context executeFetchRequest:request error:&error] retain];
    if (![context save:&error]) {
        NSLog(@"Cannot fetch the story from the fetch request.");
    }

    NSLog([[fav objectAtIndex:0] title]);
    error = nil;
    [context deleteObject:[fav objectAtIndex:0]];
    if (![context save:&error]) {
        NSLog(@"Can't delete the fav! %@", error);
    }
}

The app instantly crashes and I get this message in the console. But when I launch the app afterwards, the row has been deleted.

Detected an attempt to call a symbol in system libraries that is not present on the iPhone:
_Unwind_Resume called from function _PFFaultHandlerLookupRow in image CoreData.

Please help!
Thanks in advance to everyone!

Philip Regan Philip Regan · Accepted Answer · 2011-01-07T14:40:55

This is probably related to a bug within Core Data itself. I had the same error come up (I asked about it here in SO) and my only fix was to change the keywords in the predicate that still allowed the same results. It took some experimenting to find the right combination. Not ideal, but that's the best answer I can offer based on my experience.

Core Data error: _Unwind_Resume called from function _PFFaultHandlerLookupRow in image CoreData

2 Answers