pkg/front_end/testcases/inference/null_literal_should_not_infer_as_bottom.dart:15:5: Context: Write to f@353
  f = /*@ returnType=Null? */ (/*@ type=Object* */ x) => 'hello';
    ^
pkg/front_end/testcases/inference/null_literal_should_not_infer_as_bottom.dart:18:5: Context: Write to g@537
  g = 'hello';
    ^