#Predicate a bit tricky

Hi, Overview I am finding #Predicate to be a bit tricky when used with Swift Data It compiles fine but crashes at runtime I know the fix for the problem just wondering if such pitfalls can be avoided at compile time Exception *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'can't use NULL on left hand side' terminating due to uncaught exception of type NSException CoreData: error: SQLCore dispatchRequest: exception handling request: <NSSQLFetchRequestConte...