1 error[E0282]: type annotations needed
2 --> $DIR/issue-6458-2.rs:3:21
4 LL | format!("{:?}", None);
5 | ^^^^ cannot infer type of the type parameter `T` declared on the enum `Option`
7 help: consider specifying the generic argument
9 LL | format!("{:?}", None::<T>);
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0282`.