Malformed descriptor

[guhaizhous]

var schema = new Schema(fs.readFileSync('./buftest.proto'));
Error: Malformed descriptor
at Error (native)
at Object. (D:\mytest\game\test.js:76:14)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
at startup (node.js:129:16)
at node.js:814:3

buftest.proto

package com.game.buftest;

message BufTest{
optional float num =1;
optional bytes payload =2;
}

I don't know where it was,

[goudan0096]

I have the same issue,Is there anyone who knows the reason?