simple throwing errors will not response the data i want

[yuchienho]

the doc said that :"To return an error as your response, simply throw the error you want. "
then i do this:
if (err) {
throw new geddy.errors.BadRequestError();
}
i get follow:
Bad Request
at Steps.index (/Users/hyq/Brisker/Server/to_do/app/controllers/steps.js:9:17)
at utils.mixin.load (/Users/hyq/Brisker/Server/to_do/node_modules/geddy/node_modules/model/lib/adapters/mongo/index.js:310:13)
at Cursor.toArray (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/cursor.js:163:16)
at Cursor.nextObject.commandHandler (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/cursor.js:709:16)
at Db._executeQueryCommand (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/db.js:1847:9)
at Server.Base._callHandler (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/connection/base.js:445:41)
at Server.connect.connectionPool.on.server._serverState (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/connection/server.js:478:18)
at MongoReply.parseBody (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/responses/mongo_reply.js:68:5)
at Server.connect.connectionPool.on.server._serverState (/Users/hyq/Brisker/Server/to_do/node_modules/mongodb/lib/mongodb/connection/server.js:436:20)
at emit (events.js:95:17)

Process finished with exit code 8

The process exist in development mode while catching the uncaughtException in production mode.
How should i do to get the correct error response?

[ben-ng]

Are you using bcrypt by any chance? Modules that use native bindings can result in this problem because the errors happen outside the domain.