1 error[E0277]: the trait bound `str: std::fmt::UpperHex` is not satisfied
2 --> $DIR/ifmt-unimpl.rs:12:21
4 LL | format!("{:X}", "3");
5 | ^^^ the trait `std::fmt::UpperHex` is not implemented for `str`
7 = note: required because of the requirements on the impl of `std::fmt::UpperHex` for `&str`
8 = note: required by `std::fmt::UpperHex::fmt`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0277`.