swift4 - iOS XCode - 带有 RXSwift 的 Swift Playground 一直被微调器冻结

Question

我在操场上尝试一些 RXSwift 代码，而 XCode 每隔几分钟就会用彩虹微调器冻结。然后 XCode 停止响应，必须强制退出并重新启动。这发生在多个项目和 Mac 上。项目文件中的常规 RXSwift 代码不会导致崩溃。

在游乐场模式下使用 RXSwift 时如何修复 XCode 冻结？

import RxSwift
import RxCocoa
import PlaygroundSupport
import Foundation

var str = "Hello, playground"
print(str)

let subject = BehaviorSubject(value: "seed")

let replayed = subject.replay(1)

let sequence = Observable.of("first","Second") //random crashes as I type and the console outputs error messages.

replayed.connect()

replayed.subscribe(onNext: { value in
    print(value)
}, onError: { error in
    print("Received Error")
}, onCompleted: {
    print("Received Completion")
})

这是我的播客文件：

platform :ios, '11.0'

use_frameworks!

pod 'RxSwift'
pod 'RxCocoa'

target 'RxSwiftPlayground'



post_install do |installer|

    installer.pods_project.build_configurations.each do |config|
        config.build_settings.delete('CODE_SIGNING_ALLOWED')
        config.build_settings.delete('CODE_SIGNING_REQUIRED')
    end

    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            config.build_settings['CONFIGURATION_BUILD_DIR'] = '$PODS_CONFIGURATION_BUILD_DIR'
        end
    end
end

我认为我唯一的症状是强制退出后，我在控制台中收到此错误，直到我重建项目（它正在编译并在冻结之前完成了代码）

Playground execution failed:

    error: RxSwift.playground:3:8: error: no such module 'RxSwift'
    import RxSwift