Backtrace in Rust without panicking

backtrace.rs

// [depdendencies]
// backtrace = "0.3" # https://docs.rs/crate/backtrace/latest

fn backtrace(level: usize) {
    let (trace, curr_file, curr_line) = (backtrace::Backtrace::new(), file!(), line!());
    let symbols = trace
        .frames()
        .iter()
        .flat_map(backtrace::BacktraceFrame::symbols)
        .skip_while(|s| {
            s.filename().map(|p| !p.ends_with(curr_file)).unwrap_or(true)
                || s.lineno() != Some(curr_line)
        });
    println!("backtrace() is called from..");
    for (i, sym) in symbols.enumerate() {
        if i > level {
            break;
        }
        println!(
            "{i}: {:?}:{:?}\n\t\x1b[2m{:?}\x1b[0m",
            backtrace::BacktraceSymbol::filename(sym)
                .unwrap_or(std::path::Path::new("(none)")),
            backtrace::BacktraceSymbol::lineno(sym).unwrap_or(0),
            backtrace::BacktraceSymbol::name(sym),
        );
    }
}