C++ - Reddit on Telegram: “This Rust code was the one responsible for takin…”

This Rust code was the one responsible for taking the whole damn world offline.

/// Fetch edge features based on `input` struct into [`Features`] buffer.
pub fn fetch_features(
    &mut self,
    input: &dyn BotsInput,
    features: &mut Features,
) -> Result<(), (ErrorFlags, i32)> {
    // update features checksum (lower 32 bits) and copy edge feature names
    features.checksum &= 0xFFFF_FFFF_0000_0000;
    features.checksum |= u64::from(self.config.checksum);
    let (feature_values, _) = features
        .append_with_names(&self.config.feature_names)
        .unwrap();
}

If this solution were still written in C++, what are the chances that this error would have happened?

Considering the code was rewritten, meaning there was already a working solution, was this forced migration from C++ to Rust really a good idea? After all, the world went down because of a human error, but maybe that mistake could have been avoided if the rewrite had never happened.

https://redd.it/1p1jurj
@r_cpp