From 8fe79459d5d2ee40719fe0c306a190dbb48b54dc Mon Sep 17 00:00:00 2001
From: Dmytro Bogovych <dmytro.bogovych@gmail.com>
Date: Fri, 20 Jul 2018 10:54:28 +0300
Subject: [PATCH] - fix for access violation

---
 src/engine/helper/HL_Sync.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/engine/helper/HL_Sync.cpp b/src/engine/helper/HL_Sync.cpp
index 624b96dc..fbd320f3 100644
--- a/src/engine/helper/HL_Sync.cpp
+++ b/src/engine/helper/HL_Sync.cpp
@@ -127,7 +127,7 @@ BufferQueue::Block BufferQueue::pull(std::chrono::milliseconds timeout)
         status = mSignal.wait_for(l, timeout);
 
     Block r;
-    if (status == std::cv_status::no_timeout)
+    if (status == std::cv_status::no_timeout && !mBlockList.empty())
     {
         r = mBlockList.front();
         mBlockList.erase(mBlockList.begin());