handyJson Xcode 9.3 崩溃问题 解决方案

nominalType.swift  

var nominalTypeDescriptor: NominalTypeDescriptor? {

 let pointer = UnsafePointer(self.pointer)

 let base = pointer.advanced(by: nominalTypeDescriptorOffsetLocation)

 if base.pointee == 0 {

 // swift class created dynamically in objc-runtime didn't have valid nominalTypeDescriptor

 return nil

        }

 #if swift(>=4.1)

 return NominalTypeDescriptor(pointer: relativePointer(base: base, offset: base.pointee - base.hashValue))

 #else

 return NominalTypeDescriptor(pointer: relativePointer(base: base, offset: base.pointee))

 #endif

    }