From c4bfee070e3f9ae0b4cac4c5524524a1162ed0ca Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Tue, 19 Apr 2022 13:39:26 +0200
Subject: [PATCH] =?UTF-8?q?-=20don=E2=80=99t=20crash=20on=20sector-less=20?=
 =?UTF-8?q?walls.?=
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---
 source/core/rendering/hw_vertexmap.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/core/rendering/hw_vertexmap.cpp b/source/core/rendering/hw_vertexmap.cpp
index 3f19320788a..6d977fd03a4 100644
--- a/source/core/rendering/hw_vertexmap.cpp
+++ b/source/core/rendering/hw_vertexmap.cpp
@@ -71,7 +71,7 @@ void CreateVertexMap()
 				if (processed[w]) return;	// broken wall setups can trigger this.
 				walls.Push(w);
 				processed.Set(w);
-				if (!sectors.Contains(wal->sector))
+				if ((unsigned)wal->sector < sector.Size() && !sectors.Contains(wal->sector))
 				{
 					sectors.Push(wal->sector);
 					countpersector[wal->sector]++;