Fix uncaught error issue

Author: juliusza

lib/client.js

@@ -424,20 +424,22 @@ Client.prototype.query = function (config, values, callback) {
     queryCallback = query.callback;
 
     readTimeoutTimer = setTimeout(() => {
-      var error = new Error('Query read timeout');
+      var error = new Error('Query read timeout')
 
       this.emit('error', error)
       queryCallback(error)
 
       // we already returned an error,
-      // just do nothing when query completes
-      delete query.callback
+      // just do nothing if query completes
+      query.callback = () => {}
 
       // Remove from queue
       var index = this.queryQueue.indexOf(query)
       if (index > -1) {
         this.queryQueue.splice(index, 1)
       }
+
+      this._pulseQueryQueue()
     }, readTimeout)
 
     query.callback = (err, res) => {