println!("{:?}",(vfnfer[0] as dyn Fn)(3));
//~^ ERROR the precise format of `Fn`-family traits'
//~| ERROR wrong number of type arguments: expected 1, found 0 [E0107]
- //~| ERROR the value of the associated type `Output` (from trait `std::ops::FnOnce`)
+ //~| ERROR the value of the associated type `Output` (from trait `FnOnce`)
}