Anonymous Function Reference Memory Leak (#20)

It seems that inside the checkQueue method, the anonymous function defined as the same name is causing a memory leak.

If we forcefully set the variable to null when we will not be calling it recursively, it stops the memory leak from occurring.

Author: ellisonpatterson

src/Discord/Bucket.php

@@ -133,13 +133,15 @@ public function checkQueue()
                 }
                 $this->logger->info($this.' expecting rate limit, timer interval '.($interval * 1000).' ms');
                 $this->checkerRunning = false;
+                $checkQueue = null;
 
                 return;
             }
 
             // Queue is empty, job done.
             if ($this->queue->isEmpty()) {
                 $this->checkerRunning = false;
+                $checkQueue = null;
 
                 return;
             }
@@ -191,6 +193,8 @@ public function checkQueue()
                     // Will be restarted when global rate-limit finished.
                     else {
                         $this->checkerRunning = false;
+                        $checkQueue = null;
+
                         $this->logger->debug($this.' stopping queue checker');
                     }
                 } else {