{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, never_type_fallback, "1.41.0", Some(65992)),
    /// Allows diverging expressions to fall back to `!` rather than `()`.
    /// Switch `..` syntax to use the new (`Copy + IntoIterator`) range types.