Oh interesting, I didn't know that ALGOL had that. Looking through the Wikipedia pages, it seems that Rust most likely gained it via the ALGOL->ISWIM->ML->Ocaml->Rust route. I hope it catches on in more imperative languages in the future. After using it for a while, statement terminated syntax feels so clunky in comparison. I love being able to break out into a block like:

    let foo = {
        /* do stuff */;
        some_expression
    };