mcs/errors/cs8178.cs

   1 // CS8178: `await' cannot be used in an expression containing a call to `X.Wrap(int)' because it returns by reference
   2 // Line: 12
   3
   4 using System.Threading.Tasks;
   5
   6 class X
   7 {
   8         int x;
   9
  10         async Task Test ()
  11         {
  12                 Foo (ref Wrap (await Task.FromResult (1))) = 4;
  13         }
  14
  15         ref int Wrap (int arg)
  16         {
  17                 return ref x;
  18         }
  19
  20         static ref int Foo (ref int arg)
  21         {
  22                 return ref arg;
  23         }
  24 }