title: .send() and .sink() do not seem to work anymore for PassthroughSubject in Xcode 11 Beta 5
body: <p>In the following code "Test" should be printed in the console when the Button is pressed, but it's not. The event is not send through the publisher.
  Any idea what happened with PassthroughSubject in Xcode 11 Beta 5 ?
  (in Xcode 11 Beta 4 it works well)</p>
  
  <pre><code>var body: some View {  
  
      let publisher = PassthroughSubject&lt;String, Never&gt;()
  
      publisher.sink { (str) in  
          print(str)  
      }  
      return Button("OK") {  
          publisher.send("Test")  
      }  
  }
  </code></pre>
  
  <p>P.S. I know there are other ways to print a string when a button is pressed, I just wanna show a simple send-receive example</p>