Macro rubbl_core::rn_severe

macro_rules! rn_severe {
    ($dest:expr, $( $fmt_args:expr ),*) => { ... };
    ($dest:expr, $( $fmt_args:expr ),* ; $err:expr) => { ... };
}

Notify the user of a severe problem.

See the documentation of rn_note! for usage information. This macro should be used when an issue has been detected that makes it likely that the task at hand cannot be completed successfully; however, the program will attempt to continue.