A data race that doesn't compile (in Rust)
The article discusses the author's experience with data races in parallel programming, specifically in the context of a Redux-like state management pattern in Rust. The author aimed to teach Rust's type system to prevent data races in a parallel reducer pipeline, where multiple reducers might write to the same piece of state. The author successfully achieved this goal in their ruxe library, leveraging Rust's type system to encode the property of disjointness and prevent data races at compile-time.
- ▪Data races are a class of bugs that can be difficult to debug and are often caused by parallel programming.
- ▪Rust's type system can prevent data races at compile-time through its borrow checker and ownership model.
- ▪The author's ruxe library implements a Redux-like state management pattern in Rust, with a focus on preventing data races in parallel reducer pipelines.
Opening excerpt (first ~120 words) tap to expand
Home » Posts A data race that doesn't compile June 23, 2026 · 16 min How I taught Rust’s type system to refuse my own parallel-Redux data races, with one false start and one mind-shift. There’s a class of bug I’ve spent more nights chasing than I care to remember. The kind that only happens under load, vanishes when you attach a debugger, and takes three engineers a weekend to corner. Data races. Rust’s borrow checker prevents most of them at the value level. But not all of them, and definitely not the question that interested me here: can the compiler refuse to build a parallel reducer pipeline where two reducers might write to the same piece of state? Turns out yes. This post is the story of how I got there in ruxe, my Redux-flavored Rust learning library.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Corentin Corgié.
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