From b4deb85edec9ae1a22b5e99e77a66e26ab2be699 Mon Sep 17 00:00:00 2001
From: erikzhang <erik@neo.org>
Date: Fri, 6 Dec 2019 16:09:38 +0800
Subject: [PATCH] Dispose ApplicationEngine after using

---
 RpcNep5Tracker/RpcNep5Tracker.cs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/RpcNep5Tracker/RpcNep5Tracker.cs b/RpcNep5Tracker/RpcNep5Tracker.cs
index 75788a683..183ae23b3 100644
--- a/RpcNep5Tracker/RpcNep5Tracker.cs
+++ b/RpcNep5Tracker/RpcNep5Tracker.cs
@@ -165,10 +165,12 @@ public void OnPersist(StoreView snapshot, IReadOnlyList<Blockchain.ApplicationEx
                     script = sb.ToArray();
                 }
 
-                ApplicationEngine engine = ApplicationEngine.Run(script, snapshot, extraGAS: 100000000);
-                if (engine.State.HasFlag(VMState.FAULT)) continue;
-                if (engine.ResultStack.Count <= 0) continue;
-                nep5BalancePair.Value.Balance = engine.ResultStack.Pop().GetBigInteger();
+                using (ApplicationEngine engine = ApplicationEngine.Run(script, snapshot, extraGAS: 100000000))
+                {
+                    if (engine.State.HasFlag(VMState.FAULT)) continue;
+                    if (engine.ResultStack.Count <= 0) continue;
+                    nep5BalancePair.Value.Balance = engine.ResultStack.Pop().GetBigInteger();
+                }
                 nep5BalancePair.Value.LastUpdatedBlock = snapshot.Height;
                 if (nep5BalancePair.Value.Balance == 0)
                 {