[CSClosure] Warn about `defer` being the last element in the closure body
[CSClosure] Warn about `defer` being the last element in the closure body

rudkx/swift,atrick/swift,ahoppen/swift,glessard/swift,JGiola/swift,benlangmuir/swift,benlangmuir/swift,gregomni/swift,ahoppen/swift,atrick/swift,JGiola/swift,apple/swift,benlangmuir/swift,ahoppen/swift,gregomni/swift,roambotics/swift,rudkx/swift,JGiola/swift,gregomni/swift,roambotics/swift,JGiola/swift,glessard/swift,gregomni/swift,atrick/swift,ahoppen/swift,benlangmuir/swift,apple/swift,gregomni/swift,roambotics/swift,ahoppen/swift,roambotics/swift,rudkx/swift,JGiola/swift,glessard/swift,apple/swift,glessard/swift,ahoppen/swift,apple/swift,benlangmuir/swift,JGiola/swift,glessard/swift,atrick/swift,atrick/swift,atrick/swift,glessard/swift,gregomni/swift,roambotics/swift,rudkx/swift,roambotics/swift,rudkx/swift,benlangmuir/swift,apple/swift,rudkx/swift,apple/swift