JSONDecoder parse type differently on Linux

[ypli-chn]

Example Code

import Foundation

class Base: Codable { }
class Child: Base { }

func dynamicType() -> Base.Type {
    return Child.self
}

let data = "{}".data(using: .utf8)!

let classType = dynamicType()
let instance = try JSONDecoder().decode(classType, from: data)
print("type: \(instance) => \(type(of: instance))")

on macOS:

type: JSONDecoderExample.Child => Child

on Linux:

type: JSONDecoderExample.Base => Base

[glessard]

Fixed in #4807