Exception thrown in NSOrderedSet generated accessors

Question

On my Lion app, I have this data model:

The relationship subitems inside Item is ordered.

Xcode 4.1 (build 4B110) has created for me the file Item.h, Item.m, SubItem.h and SubItem.h.

Here is the content (autogenerated) of Item.h:

#import <Foundation/Foundation.h>  #import <CoreData/CoreData.h>  @class SubItem;  @interface Item : NSManagedObject { @private }  @property (nonatomic, retain) NSString * name; @property (nonatomic, retain) NSOrderedSet *subitems; @end  @interface Item (CoreDataGeneratedAccessors)  - (void)insertObject:(SubItem *)value inSubitemsAtIndex:(NSUInteger)idx; - (void)removeObjectFromSubitemsAtIndex:(NSUInteger)idx; - (void)insertSubitems:(NSArray *)value atIndexes:(NSIndexSet *)indexes; - (void)removeSubitemsAtIndexes:(NSIndexSet *)indexes; - (void)replaceObjectInSubitemsAtIndex:(NSUInteger)idx withObject:(SubItem *)value; - (void)replaceSubitemsAtIndexes:(NSIndexSet *)indexes withSubitems:(NSArray *)values; - (void)addSubitemsObject:(SubItem *)value; - (void)removeSubitemsObject:(SubItem *)value; - (void)addSubitems:(NSOrderedSet *)values; - (void)removeSubitems:(NSOrderedSet *)values;  @end 

And here is the content (autogenerated) of Item.m:

#import "Item.h" #import "SubItem.h"  @implementation Item  @dynamic name; @dynamic subitems;  @end 

As you can see, the class Item offers a method called addSubitemsObject:. Unfortunately, when trying to use it in this way:

Item *item = [NSEntityDescription insertNewObjectForEntityForName:@"Item" inManagedObjectContext:self.managedObjectContext]; item.name = @"FirstItem";  SubItem *subItem = [NSEntityDescription insertNewObjectForEntityForName:@"SubItem" inManagedObjectContext:self.managedObjectContext];  [item addSubitemsObject:subItem]; 

this error appear:

2011-09-12 10:28:45.236 Test[2002:707] *** -[NSSet intersectsSet:]: set argument is not an NSSet 

Can you help me?

Update:

After just 1,787 days from my bug report, today (August 1, 2016) Apple wrote me this: "Please verify this issue with the latest iOS 10 beta build and update your bug report at bugreport.apple.com with your results.". Let's hope this is the right time :)

Answer 1

I reproduced your setup both with your data model and one of my own with different names. I got the same error in both cases.

Looks like a bug in Apple's autogenerated code.