Error: cyclic dependency detected
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:296:33)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:618:17)
at serializeObject (/project/test/node_modules/bson/lib/bson/parser/serializer.js:308:18)
at serializeInto (/project/test/node_modules/bson/lib/bson/parser/serializer.js:776:17)
at BSON.serialize (/project/test/node_modules/bson/lib/bson/bson.js:58:27)
at Query.toBin (/project/test/node_modules/mongodb-core/lib/connection/commands.js:140:25)
at Pool.write (/project/test/node_modules/mongodb-core/lib/connection/pool.js:921:23)
at Server.command (/project/test/node_modules/mongodb-core/lib/topologies/server.js:515:15)
at Server.command (/project/test/node_modules/mongodb/lib/server.js:376:17)
at executeCommand (/project/test/node_modules/mongodb/lib/db.js:310:19)
at Db.command (/project/test/node_modules/mongodb/lib/db.js:334:44)
at Collection.aggregate (/project/test/node_modules/mongodb/lib/collection.js:2686:13)

Code to reproduce:

const mongoose = require('mongoose');
mongoose.Promise = require('bluebird');
const

{ Schema }

= mongoose;

const connect = () => {
const options =

{ promiseLibrary: require('bluebird') }

;
mongoose.connect('mongodb://localhost:27017/mongoose_test', options);
};
connect();

mongoose.connection.on('error', (err) =>

{ console.error(err); }

);

const UserSchema = new Schema({
location: {
type:

{ type: String, default: 'Point' }

,
coordinates:

{ type: Array, default: [0, 0] }

}
});
UserSchema.index(

{ location: '2dsphere' }

);

const User = mongoose.model('User', UserSchema);

const userId = '586d3620f6da431b4aec1a12';

let user = new User(

{ _id: userId }

)

user.save();

function getUserLocation() {
return User.findById(userId)
.then((user) => {
return new Promise((resolve, reject) => {
if (user && user.location)

{ resolve(user.location); }

else

{ reject(); }

});
});
}

function myAwesomeFunction(userLocation) {
return User.aggregate([{
$geoNear:

{ near: userLocation, distanceField: 'distance', maxDistance: 1000, spherical: true }

}
]);
}

getUserLocation()
.then(myAwesomeFunction)
.then(console.log)
.catch(console.error);