From c4dd6a9df8412e854bde574461d1309511d2ad11 Mon Sep 17 00:00:00 2001
From: demojie <1426134543@qq.com>
Date: Tue, 11 Feb 2020 20:02:48 +0800
Subject: [PATCH] Fix memory leak by setting position of popped element to
 null.

---
 src/main/java/com/github/hcsp/Stack.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/github/hcsp/Stack.java b/src/main/java/com/github/hcsp/Stack.java
index db23e86..1491b9d 100644
--- a/src/main/java/com/github/hcsp/Stack.java
+++ b/src/main/java/com/github/hcsp/Stack.java
@@ -21,7 +21,11 @@ public Object pop() {
         if (size == 0) {
             throw new EmptyStackException();
         }
-        return elements[--size];
+        int currentIndex = --size;
+        Object element = elements[currentIndex];
+        // Release the reference
+        elements[currentIndex] = null;
+        return element;
     }
 
     /**