{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"trace!(\"visit_basic_block_data:"}]}
        trace!("visit_basic_block_data: bb={:?} is_cleanup={:?}", bb, block.is_cleanup);
    fn visit_basic_block_data(&mut self, bb: BasicBlock, block: &mir::BasicBlockData<'tcx>) {