NSOrderedSet should support KVC collection operators

Number:rdar://12741645 Date Originated:2012/11/22
Status:Open Resolved:
Product:Mac OS X SDK Product Version:10.8
Classification:Serious Bug Reproducible:Always
NSOrderedSet does not support KVO collection operators, such as @distinctUnionOfArrays. 

 -[NSOrderedSet valueForKeyPath:@"@distinctUnionOfArrays.<keypath>"].
throws an exception.

Some sample code illustrating the issue is available here :



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