遇到下面这种问题应该怎么调试？在调试上有什么技巧？（我看了我index.ejs没发现什么问题啊）

Error
Looks like something broke!

Message:       
Unexpected identifier in "index.ejs"
       
Stack:  
SyntaxError: Unexpected identifier in "index.ejs"
    at Function (native)
    at exports.compile (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:339:15)
    at exports.render (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:381:66)
    at next (native)
    at exports.renderFile (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:412:17)
    at next (native)
    at Object.app.context.render (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:167:23)
    at next (native)
    at onFulfilled (/home/quoniam/projects/V-club/node_modules/koa/node_modules/co/index.js:65:19)
    at process._tickCallback (node.js:356:9)