errors/gcs1961-37.cs

   1 // CS1961: The covariant type parameter `T' must be invariantly valid on `A<T>.B(ref T)'
   2 // Line: 5
   3 // Compiler options: -langversion:future
   4
   5 interface A<out T>
   6 {
   7         void B(ref T t);
   8 }