Unclosed INDENT in line 6 ( CoffeeScript ) Compiler Error

Here is my code in CoffeeScript for a simple test with MongoDB. When I run

coffee -c UserDataProvider.coffee

I end up with an error UNCLOSED INDENT ON LINE 6

This is my code:

Db   = require('mongodb/db').Db
ObjectID = require('mongodb/bson/bson').ObjectID
Server   = require('mongodb/connection').Server

class UserDataProvider
    constructor = (host,port)->
        this.db = new Db( 'test' , new Server(host ,port,{}))

    getCollection = (callback) ->
        this.db.collection('data',(error,data)->
            if error then callback(error)
            else callback(data)

The StackTrace is:

Error: In UserDataProvider.coffee, unclosed IN开发者_如何学运维DENT on line 6
    at Error (unknown source)
    at Rewriter.ensureBalance (/usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/rewriter.js:283:17)
    at Rewriter.rewrite (/usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/rewriter.js:21:12)
    at Lexer.tokenize (/usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/lexer.js:37:29)
    at Object.compile (/usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/coffee-script.js:26:34)
    at /usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/command.js:117:33
    at /usr/local/lib/node/.npm/coffee-script/1.0.1/package/lib/command.js:85:26
    at [object Object].<anonymous> (fs.js:86:5)
    at [object Object].emit (events.js:39:17)
    at afterRead (fs.js:843:12)

Can anyone help?

The first left parenthesis on this line is never closed:

this.db.collection('data',(error,data) ->

It is actually not needed at all, so you probably want to remove it all together, if your intention is to pass "data" as the first argument and the function(error, data) { ... } as the second argument.

FYI, the unhelpful error message is a bug in current version.

• https://github.com/jashkenas/coffee-script/issues/1120