Node.js中未显示行上的隐形神话意外令牌

Question

So today, node don't run my app, because it finds unexpected token at line 219. Here is the full error log:

syberic@syberic:~/Web/lotalot$ node app.js
/home/syberic/Web/lotalot/config/passport.js:219
});
 ^

SyntaxError: Unexpected token )
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:387:25)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at Object.<anonymous> (/home/syberic/Web/lotalot/app.js:22:1)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:141:18)
    at node.js:933:3

BUT the PROBLEM is, the file passport.js Has 217 lines! Here is a screenshot of how the end of this file looks in VIM: I inspected the file with some other text editors, mousepad, gedit, etc. But the file always have 217 lines. When i add some empty lines to the end of the file, unexpected token moves down respectively. What kind of MAGIC is this? How can this happen? I'm so damn frustrated.

Answer 1

I think this means you have an extra opening brace in your program. Internally, Node pastes the text of your program inside a function, so there are some extra characters before your file contents and an extra line after it. I can reproduce this easily with this one-line file that has just an open brace in it:

$ cat foo.js 
{
$ node foo.js
/Users/dap/foo.js:3
});
 ^
SyntaxError: Unexpected token )
    at Module._compile (module.js:439:25)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:906:3

I would suggest using a tool like javascriptlint to find the extra open brace.