use error_backtrace::{Result, ResultBacktrace};

#[derive(Debug)]
struct Error;

fn main() -> Result<(), Error> {
    maybe_error().backtrace()?;
    Ok(())
}

fn maybe_error() -> Result<(), Error> {
    maybe_error2()?;
    match maybe_error2() {
        Ok(x) => x,
        Err(e) => panic!("Inner error is {:?}", *e),
    };

    Ok(())
}

fn maybe_error2() -> Result<(), Error> {
    error_source()?;

    Ok(())
}

fn error_source() -> Result<(), Error> {
    Err(Error {}.into())
}