{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"///"}]}
    /// when reevaluating ambiguous goals. E.g. if we've got a goal `?x: Trait` with `?x`
    /// This is used as a minor optimization to avoid re-resolving inference variables
    /// already being constrained to `Vec<?y>`, then the first evaluation resolves it to