Coercions work now

src/test/ui/dyn-star/dyn-async-trait.rs

@@ -22,7 +22,7 @@ fn increment<'a>(&'a mut self) -> dyn* Future<Output = usize> + 'a {
         Box::pin(async {
             self.count += 1;
             self.count
-        }) as dyn* Future<Output = _> // FIXME(dyn-star): coercion doesn't work here yet
+        })
     }
 }