{"ast_node_type":"function","tokens":[{"end":95,"kind":"keyword","start":0,"text":"span_bug!(tcx.def_span(parent_def_id),"}]}
            span_bug!(tcx.def_span(parent_def_id), "unexpected non-lifetime binder on fn sig");
        let ty::BoundVariableKind::Region(ty::BoundRegionKind::Named(def_id)) = bound_var else {
        };