From 028f0bdb8ddc5394322f535048060ce8dce08eac Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 25 Aug 2017 14:45:58 -0400
Subject: [PATCH] Fixed #931. don't insert null pointer into DHkeys list

---
 libi2pd/Transports.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/libi2pd/Transports.cpp b/libi2pd/Transports.cpp
index b531bf71..f375296f 100644
--- a/libi2pd/Transports.cpp
+++ b/libi2pd/Transports.cpp
@@ -102,9 +102,14 @@ namespace transport
 
 	void DHKeysPairSupplier::Return (std::shared_ptr<i2p::crypto::DHKeys> pair)
 	{
-		std::unique_lock<std::mutex>l(m_AcquiredMutex);
-		if ((int)m_Queue.size () < 2*m_QueueSize)
-			m_Queue.push (pair);
+		if (pair)
+		{
+			std::unique_lock<std::mutex>l(m_AcquiredMutex);
+			if ((int)m_Queue.size () < 2*m_QueueSize)
+				m_Queue.push (pair);
+		}
+		else
+			LogPrint(eLogError, "Transports: return null DHKeys");
 	}
 
 	Transports transports;