From 85660d7397c225be395e70b623df301349e45154 Mon Sep 17 00:00:00 2001
From: Daniel Black <grooverdan@users.sourceforge.net>
Date: Sat, 11 Apr 2015 18:13:08 +1000
Subject: [PATCH] MDEV-7977 MYSQL_BIN_LOG::write_incident failing to release
 LOCK_log

This adds a unlock(LOCK_log) for the unlikely(!is_open()) branch
---
 sql/log.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sql/log.cc b/sql/log.cc
index 5db32831443e7..78b00d4d377ec 100644
--- a/sql/log.cc
+++ b/sql/log.cc
@@ -5784,6 +5784,10 @@ bool MYSQL_BIN_LOG::write_incident(THD *thd)
     if (check_purge)
       purge();
   }
+  else
+  {
+    mysql_mutex_unlock(&LOCK_log);
+  }
 
   DBUG_RETURN(error);
 }