{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"self.opt_find_breakable(target_id).unwrap_or_else(||"}]}
        self.opt_find_breakable(target_id).unwrap_or_else(|| {
    fn find_breakable(&mut self, target_id: HirId) -> &mut BreakableCtxt<'tcx> {
            bug!("could not find enclosing breakable with id {}", target_id);