1 error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change. Use parenthetical notation (Fn(Foo, Bar) -> Baz) instead (see issue #29625)
2 --> $DIR/issue-23024.rs:19:35
4 LL | println!("{:?}",(vfnfer[0] as Fn)(3));
7 = help: add #![feature(unboxed_closures)] to the crate attributes to enable
9 error[E0243]: wrong number of type arguments: expected 1, found 0
10 --> $DIR/issue-23024.rs:19:35
12 LL | println!("{:?}",(vfnfer[0] as Fn)(3));
13 | ^^ expected 1 type argument
15 error[E0191]: the value of the associated type `Output` (from the trait `std::ops::FnOnce`) must be specified
16 --> $DIR/issue-23024.rs:19:35
18 LL | println!("{:?}",(vfnfer[0] as Fn)(3));
19 | ^^ missing associated type `Output` value
21 error: aborting due to 3 previous errors
23 Some errors occurred: E0191, E0243, E0658.
24 For more information about an error, try `rustc --explain E0191`.