{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"ty::ConstKind::Infer(InferConst::Var(mut"}]}
            ty::ConstKind::Infer(InferConst::Var(mut vid)) => {
        match ct.kind() {
                // We need to canonicalize the *root* of our const var.