{"ast_node_type":"impl","tokens":[{"end":98,"kind":"keyword","start":0,"text":"copy_ret_val:"}]}
        copy_ret_val: impl FnOnce(&mut Self, &PlaceTy<'tcx, M::Provenance>) -> InterpResult<'tcx>,
        unwinding: bool,
    ) -> InterpResult<'tcx, StackPopInfo<'tcx, M::Provenance>> {