Crash Swift compiler by defining a local variable with same name as class property

crash-swift-compiler.swift

import Foundation

class Foo {

    var bar: Int? = 1

}

enum BarEnum: Int {

    case zero = 0
    case one = 1
    case two = 2

}

extension Foo {

    func confuseCompiler() {
        // `bar` is a class property, defining a local variable `bar` crashes swift compiler
        guard let barEnumRawValue = bar, let bar = BarEnum(rawValue: barEnumRawValue) else {
            return
        }

        print(bar)
    }

}