From ed72843dece85b1ec3852ce4a94ad1f5d44351b1 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Wed, 7 Nov 2018 23:04:42 +0200
Subject: [PATCH] - fixed undefined behavior when grouping sections

The current group should not be accessed by reference because its container can be reallocated during iteration

https://forum.zdoom.org/viewtopic.php?t=62487
---
 src/r_data/r_sections.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/r_data/r_sections.cpp b/src/r_data/r_sections.cpp
index fcc273d33..9186a13a1 100644
--- a/src/r_data/r_sections.cpp
+++ b/src/r_data/r_sections.cpp
@@ -565,7 +565,7 @@ public:
 			// Don't use iterators here. These arrays are modified inside.
 			for (unsigned j = 0; j < build.Size(); j++)
 			{
-				auto &current = build[j];
+				auto current = build[j];
 				for (int i = 0; i < (int)workingSet.Size(); i++)
 				{
 					// Are both sections close together?