It seems like a function in pool.js is trying to access an undefined variable err

pool.js, line 867:

{{
while(self.queue.length > 0) {
var workItem = self.queue.shift();
if(typeof workItem.cb == 'function')

}
}}

This leads to an unexpected Javascript error when loosing the connection due to timeout settings.

{{
node_modules/mongodb-core/lib/connection/pool.js:867
workItem.cb(null, err);
^

ReferenceError: err is not defined
at Pool.destroy (/Users/masa/Code/docoyo.trackable/beacontrack.connectors/src/connectors2/node_modules/mongodb-core/lib/connection/pool.js:867:27)
at Connection.<anonymous> (/Users/masa/Code/docoyo.trackable/beacontrack.connectors/src/connectors2/node_modules/mongodb-core/lib/connection/pool.js:265:14)
at Connection.g (events.js:292:16)
at emitTwo (events.js:106:13)
at Connection.emit (events.js:191:7)
at Socket.<anonymous> (/Users/masa/Code/docoyo.trackable/beacontrack.connectors/src/connectors2/node_modules/mongodb-core/lib/connection/connection.js:197:10)
at Socket.g (events.js:292:16)
at emitNone (events.js:86:13)
at Socket.emit (events.js:185:7)
at Socket._onTimeout (net.js:338:8)
at ontimeout (timers.js:386:14)
at tryOnTimeout (timers.js:250:5)
at Timer.listOnTimeout (timers.js:214:5)
}}