Bug report: Rust code is being compiled in debug mode without optimization

general
1

Rust code is being compiled in debug mode, which is much slower than release mode. You can verify this in the IDE with a Rust program like

fn main() {
    #[cfg(debug_assertions)]
    println!("debug mode");

    #[cfg(not(debug_assertions))]
    println!("release mode");
}

which in release mode should output

release mode

but in debug mode actually outputs

debug mode

This observation contradicts the FAQ which claims that Rust code is compiled with -O, and explains my mysterious TLE results in Rust submissions.

Can you please fix the judge to actually compile Rust code with rustc -O?

While you’re looking at this, 1.14.0 is a really ancient version of Rust, and it’d be nice to have a modern version supporting Rust 2018 (rustc -O --edition=2018).

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