= help: the trait `Debug` is not implemented for `Rectangle`
= note: add `#[derive(Debug)]` or manually implement `Debug`
= note: required by `std::fmt::Debug::fmt`
- = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
+ = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to previous error