mcs/errors/cs8177.cs

   1 // CS8177: Async methods cannot use by-reference variables
   2 // Line: 12
   3
   4 using System.Threading.Tasks;
   5
   6 class X
   7 {
   8         int x;
   9
  10         async Task Test ()
  11         {
  12                 ref int y = ref x;
  13                 await Task.Yield ();
  14         }
  15 }