LL | println!("{}", a: &mut 4);
| ^ expecting a type here because of type ascription
|
- = note: type ascription is a nightly-only feature that lets you annotate an expression with a type: `<expr>: <type>`
+ = note: #![feature(type_ascription)] lets you annotate an expression with a type: `<expr>: <type>`
note: this expression expects an ascribed type after the colon
--> $DIR/issue-22644.rs:34:20
|