From 726821c014581bc1fad84fbd866ca291cdd80f10 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Sun, 2 Sep 2012 01:07:14 +0200
Subject: [PATCH] Fix a possible infinite recursion in the BSP splitter.

---
 opt.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/opt.cc b/opt.cc
index bd70b41..bb318a4 100644
--- a/opt.cc
+++ b/opt.cc
@@ -128,6 +128,13 @@ BSPTreeNode* make_bsp_tree(const vector<int>& remaining_roads)
 		}
 	}
 
+	if (left.empty() || right.empty()) {
+		node->is_leaf = true;
+		node->left = node->right = NULL;
+		node->roads_this_node = remaining_roads;
+		return node;
+	}
+
 	if (left.size() == 0) {
 		node->left = NULL;
 	} else {
-- 
2.39.2