Mixin result declared without body

1、错误描述

F:dojoabcdabccviewsmainmain.pug:10:1 8| include header.pug 9| div(id='main') > 10| mixin result --------^ 11| ui 12| li #{result.user_name} 13| include left.pug Mixin result declared without body
Error: F:dojoabcdabccviewsmainmain.pug:10:1
    8| include header.pug
    9| div(id='main')
  > 10| mixin result
--------^
    11| ui
    12| li #{result.user_name}
    13| include left.pug

Mixin result declared without body
    at makeError (F:dojoabcdabcc
ode_modulespug-errorindex.js:32:13)
    at Parser.error (F:dojoabcdabcc
ode_modulespug-parserindex.js:53:15)
    at Parser.parseMixin (F:dojoabcdabcc
ode_modulespug-parserindex.js:871:12)
    at Parser.parseExpr (F:dojoabcdabcc
ode_modulespug-parserindex.js:204:21)
    at Parser.parse (F:dojoabcdabcc
ode_modulespug-parserindex.js:112:25)
    at parse (F:dojoabcdabcc
ode_modulespug-parserindex.js:12:20)
    at Object.parse (F:dojoabcdabcc
ode_modulespuglibindex.js:126:22)
    at Function.loadString [as string] (F:dojoabcdabcc
ode_modulespug-loadindex.js:45:21)
    at compileBody (F:dojoabcdabcc
ode_modulespuglibindex.js:86:18)
    at Object.exports.compile (F:dojoabcdabcc
ode_modulespuglibindex.js:243:16)

2、错误原因

doctype html
html
head 
style
link(rel='stylesheet', href='../../stylesheets/main.css')
body
block content
include header.pug
div(id='main')
mixin result
ui
li #{result.user_name}
include left.pug

router.get('/main',function(req,res){
  var conn = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: 'root',
    database: 'cdm'
  });

  conn.connect();
  conn.query('select * from b_user',function(error,results,fields){
    if(error) throw error;
    console.log(results);
    res.render('main/main',{result:results});
  });
  
});

3、解决办法