1 error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
2 --> $DIR/unboxed-closure-sugar-used-on-struct-1.rs:8:16
4 LL | let x: Box<Bar()> = panic!();
5 | ^^^^^ only `Fn` traits may use parentheses
7 error[E0107]: this struct takes 1 generic argument but 0 generic arguments were supplied
8 --> $DIR/unboxed-closure-sugar-used-on-struct-1.rs:8:16
10 LL | let x: Box<Bar()> = panic!();
11 | ^^^ expected 1 generic argument
13 note: struct defined here, with 1 generic parameter: `A`
14 --> $DIR/unboxed-closure-sugar-used-on-struct-1.rs:3:8
18 help: add missing generic argument
20 LL | let x: Box<Bar(A)> = panic!();
23 error: aborting due to 2 previous errors
25 Some errors have detailed explanations: E0107, E0214.
26 For more information about an error, try `rustc --explain E0107`.