From 50724bfe137703c51084481c9741b8bcddea1f67 Mon Sep 17 00:00:00 2001
From: Tristan Su <sooqing@gmail.com>
Date: Wed, 27 Jun 2018 19:46:46 +0800
Subject: [PATCH] Catch exception by reference instead of by value

---
 sql/gis/is_simple.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/gis/is_simple.cc b/sql/gis/is_simple.cc
index ed539f6f1af..c6f75741a90 100644
--- a/sql/gis/is_simple.cc
+++ b/sql/gis/is_simple.cc
@@ -123,7 +123,7 @@ bool Is_simple::eval(const Geometrycollection &g) const {
     auto extension_of_touches = [&](const Geometry &g1, const Geometry &g2) {
       try {
         return touches(&g1, &g2);
-      } catch (null_value_exception) {
+      } catch (const null_value_exception &) {
         return false;
       }
     };