{"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"//"}]}
                    //
                    // end up with that const looking like: `ty::ConstKind::Unevaluated(def_id, args: [N#0])`.
                    // This causes ICEs (#86580) when building the args for Foo in `fn foo() -> Foo { .. }` as