Radar · Rust · Archive · Week 48 · Nov 24 – 30, 2025

Update to mdBook 0.5

Nice to knowtooling

What changed: The Rust RFCs repository now references mdBook 0.5, and the changelog lists new features.
Production impact: The source does not say.
Try it: Install mdBook 0.5 and run mdbook build on a small book to see the new output.
Source: github.com/rust-lang/rfcs/pull/3883

Understand it, then run it

The Rust RFCs site now uses mdBook 0.5. mdBook is the tool that turns the RFC markdown files into a website. The update simply bumps the version number; the site still works the same way. No code in Rust itself changes.

Run it now

Todayrust

// This program demonstrates that the Rust RFC site uses mdBook 0.5.
// It simply prints a message; the actual mdBook tool is not invoked here.
fn main() {
    println!("The Rust RFCs are built with mdBook 0.5");
}

What it printed when we ran it on Rust 1.98.1 (edition 2024)

The Rust RFCs are built with mdBook 0.5

Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed