From 543f2ce8b601b51cc2b625f633bb9795c7a62aa8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Javier=20Jaramago=20Fern=C3=A1ndez?=
 <jaramago.fernandez.javier@gmail.com>
Date: Wed, 1 Jul 2020 22:08:57 +0200
Subject: [PATCH] Fixes #2921: Prevent 'child_mysql' to access 'GloMTH' if it's
 already de-initialized

---
 lib/ProxySQL_Admin.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/ProxySQL_Admin.cpp b/lib/ProxySQL_Admin.cpp
index e672a38ed..983093dab 100644
--- a/lib/ProxySQL_Admin.cpp
+++ b/lib/ProxySQL_Admin.cpp
@@ -4603,6 +4603,7 @@ void ProxySQL_Admin::vacuum_stats(bool is_admin) {
 
 
 void *child_mysql(void *arg) {
+	if (GloMTH == nullptr) { return NULL; }
 
 	pthread_attr_t thread_attr;
 	size_t tmp_stack_size=0;