title: Debug.DrawLine not showing in the GameView
body: <p>I'm working on a 2D Unity app and I'm encountering some weird behavior.</p>
  
  <p>This code works just fine. </p>
  
  <pre><code>Debug.DrawLine(button1.transform.position, button2.transform.position, Color.green);
  </code></pre>
  
  <p>When I run the app, I see a green line in the Scene view.</p>
  
  <p>But nothing appears in the Game view when I have the following line.   </p>
  
  <pre><code>Physics2D.Linecast(button1.transform.position, button2.transform.position);
  </code></pre>
  
  <p>I'm confused as to how Unity is able to draw a line between these two buttons, but for some reason, it's just not doing it in the Game view.</p>
  
  <p>Any idea how I'd troubleshoot this?</p>