{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
        // don't emit empty unreachable cleanup blocks, so this simple check suffices.
        // We also need to prevent confusing cleanup and non-cleanup blocks. In practice we
        bbdata.terminator.is_some() && bbdata.is_empty_unreachable() && !bbdata.is_cleanup