From e3c8d3cf1c45479944d864bd9678cf25b796563a Mon Sep 17 00:00:00 2001
From: Jianping Wu <jianpingw@gmail.com>
Date: Sat, 29 Dec 2018 14:12:45 -0800
Subject: [PATCH] Fixed macOS crash.

---
 src/chainparams.h    | 3 +++
 src/coins.h          | 2 +-
 src/net_processing.h | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/chainparams.h b/src/chainparams.h
index 3510ebc2e..16ca41a32 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -77,6 +77,9 @@ public:
     const CCheckpointData& Checkpoints() const { return checkpointData; }
     const ChainTxData& TxData() const { return chainTxData; }
     void UpdateVersionBitsParameters(Consensus::DeploymentPos d, int64_t nStartTime, int64_t nTimeout);
+
+    virtual ~CChainParams() {}
+
 protected:
     CChainParams() {}
 
diff --git a/src/coins.h b/src/coins.h
index 9a529c74c..2087f5607 100644
--- a/src/coins.h
+++ b/src/coins.h
@@ -214,7 +214,7 @@ public:
     bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock, const CKevaCache &names) override;
     CCoinsViewCursor *Cursor() const override;
     size_t EstimateSize() const override;
-    bool ValidateNameDB() const;
+    bool ValidateNameDB() const override;
 };
 
 
diff --git a/src/net_processing.h b/src/net_processing.h
index fc160756e..c87fbbd28 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -42,6 +42,8 @@ private:
 public:
     explicit PeerLogicValidation(CConnman* connman, CScheduler &scheduler);
 
+    virtual ~PeerLogicValidation() {}
+
     void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
     void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
     void BlockChecked(const CBlock& block, const CValidationState& state) override;