Attribute called 'description' causes crash

I just started playing with Core Data.

I开发者_如何学JAVA created an entity called Task with a property called Description. I opened Interface Builder and I added Core Data Entity view.

Picked my entity, property and tried to build the application. After clicking on "Add" button it crashed with EXC_BAD_ACCESS.

After I've renamed this attribute to 'desc' it works fine.

Can anyone explain me why is this happening? Is 'description' some kind of reserved word in Core Data or something?

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description is ann Objective-C property used for debugging and goes all the way down to Core Foundation, which has a corresponding CFDescription function. You should just name that property something else.

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It's a method with a particular purpose in Cocoa, and Core Data dislikes it being overridden. More here.