title: new flutter project in vscode has error
body: <p>when i create a new flutter project in vscode it will immediately shows an error in the main.dart file and gives a gradle error when trying to debug. </p>
  
  <p>shown here:  <a href="https://i.stack.imgur.com/5CeKb.png" rel="nofollow noreferrer">main.dart error</a></p>
  
  <p>"compiler message: lib/main.dart:68:19: Error: Too few positional arguments: 1 required, 0 given."</p>
  
  <p>I've reinstalled dart and flutter plugins.  updated the java install. 
  in debug console i get this:
  <a href="https://i.stack.imgur.com/zH9WP.png" rel="nofollow noreferrer">debug console</a> </p>
  
  <p>added output of  flutter doctor -v 
  <a href="https://i.stack.imgur.com/Zi3Jp.png" rel="nofollow noreferrer">enter image description here</a></p>