{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"debug!(\"codegen_block_as_unreachable({:?})\","}]}
        debug!("codegen_block_as_unreachable({:?})", bb);
        let bx = &mut Bx::build(self.cx, llbb);
        bx.unreachable();