Remove the lazy client error handler on close

lib/queue.js

@@ -144,7 +144,9 @@ const Queue = function Queue(name, url, opts) {
   this.clients = [];
   const lazyClient = redisClientGetter(this, opts, (type, client) => {
     // bubble up Redis error events
-    client.on('error', this.emit.bind(this, 'error'));
+    const handler = this.emit.bind(this, 'error');
+    client.on('error', handler);
+    this.once('close', () => client.removeListener('error', handler));
 
     if (type === 'client') {
       this._initializing = commands(client).then(
@@ -561,6 +563,7 @@ Queue.prototype.close = function(doNotWaitJobs) {
     .finally(() => {
       this.childPool && this.childPool.clean();
       this.closed = true;
+      this.emit('close');
     }));
 };