使用覆盖对象在属性上执行EXC BAD ACCESS

Question

这是我的简单测试：

func testInitWithResponseAsDictionaryAndStatusFalse() {

    let operation = WLMockRequestOperation()
    operation.responseObject = "asdsa" //here is an error
}

错误是：

  

线程1：EXC_BAD_ACCESS（代码= 1，地址= 0x0）

这是我的WLMockRequestOperation课程：

class WLMockRequestOperation: AFHTTPRequestOperation {

    var myOverridenResponseObject: AnyObject?

    override var responseObject: AnyObject? {

        get {
            return myOverridenResponseObject
        }

        set {
            myOverridenResponseObject = newValue
        }
    }
}