From 682baeba6f2bd5a3dcdef07abb79b8662be1301a Mon Sep 17 00:00:00 2001
From: hvlad <hvlad@users.sourceforge.net>
Date: Thu, 22 Oct 2015 13:40:43 +0000
Subject: [PATCH] Fixed AV on client : when disconnect happens while event
 callback run

---
 src/yvalve/why.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/yvalve/why.cpp b/src/yvalve/why.cpp
index bf4d9d421c..c40abfcccd 100644
--- a/src/yvalve/why.cpp
+++ b/src/yvalve/why.cpp
@@ -3872,9 +3872,15 @@ FB_API_HANDLE& YEvents::getHandle()
 void YEvents::destroy(unsigned dstrFlags)
 {
 	attachment->childEvents.remove(this);
-
 	removeHandle(&events, handle);
 
+	if (!(dstrFlags & DF_RELEASE))
+	{
+		const bool allowCancel = destroyed.compareExchange(0, 1);
+		if (!allowCancel)
+			return;
+	}
+
 	destroy2(dstrFlags);
 }