From 036920c7262dfaf1532f3ba77a013b7ec04d5f7c Mon Sep 17 00:00:00 2001
From: Vladislav Vaintroub <wlad@mariadb.com>
Date: Thu, 4 Jun 2020 22:07:13 +0200
Subject: Fix crash on Windows

srv_thread_pool->disable_aio() followed by os_file_close()
causes crash, even though it should be OK.
---
 tpool/tpool.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tpool/tpool.h b/tpool/tpool.h
index ae9baf236b0..239be53c27e 100644
--- a/tpool/tpool.h
+++ b/tpool/tpool.h
@@ -229,7 +229,7 @@ public:
     m_aio.reset();
   }
   int bind(native_file_handle &fd) { return m_aio->bind(fd); }
-  void unbind(const native_file_handle &fd) { m_aio->unbind(fd); }
+  void unbind(const native_file_handle &fd) { if (m_aio) m_aio->unbind(fd); }
   int submit_io(aiocb *cb) { return m_aio->submit_io(cb); }
   virtual void wait_begin() {};
   virtual void wait_end() {};
-- 
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