显然,CLLocation对象无法精确存档/取消存档

在我的应用程序中(仅显示相关代码),我有一个类 Test 具有属性

var location: CLLocation  

我使用

public func encode(with aCoder: NSCoder) {
    aCoder.encode(location, forKey: "location")
}  

而且它使用

required convenience public init?(coder aDecoder: NSCoder) {
    let unarchivedLocation = aDecoder.decodeObject(forKey: "location") as! CLLocation
    self.init(location: unarchivedLocation)
}  

单元测试使用

func test_archiningUnarchiving() {
    // given
    let location = CLLocation.init(latitude: 0.0, longitude: 0.0)
    let test = Test(location: location)
    // when
    let data = NSKeyedArchiver.archivedData(withRootObject: test)
    let unarchivedTest = NSKeyedUnarchiver.unarchiveObject(with: data) as? Test
    // then
    XCTAssertEqual(unarchivedTest!.location, location, "location was not correctly unarchived")
}  

此测试失败:

XCTAssertEqual failed: ("<+0.00000000,+0.00000000> +/- 0.00m (speed -1.00 mps / course -1.00) @ 1/19/18, 3:30:50 PM Central European Standard Time") is not equal to ("<+0.00000000,+0.00000000> +/- 0.00m (speed -1.00 mps / course -1.00) @ 1/19/18, 3:30:50 PM Central European Standard Time") - location was not correctly unarchived

日志两次显示原始位置和未归档位置的完全相同的数据。
你知道到底出了什么问题吗??