{"ast_node_type":"impl","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
            // disqualifying the built-in auto impl for `i64: AutoTrait` either.
            // we probably don't want to treat an `impl !AutoTrait for i32` as
            ty::Infer(ty::IntVar(_) | ty::FloatVar(_)) => {