Macro rubbl_core::rn_fatal

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

Notify the user of a fatal problem.

See the documentation of rn_note! for usage information. This macro should be used when an issue has been detected that forces the program to give up on the task at hand. If the command-line interface is being used, it will probably exit almost immediately after a fatal notification is issued.