From b3d860dfd06e8c3ab2e2fa8ef3a797c1490179e4 Mon Sep 17 00:00:00 2001
From: Jakob Erdmann <jakob.erdmann@dlr.de>
Date: Mon, 7 Oct 2024 09:07:19 +0200
Subject: [PATCH] fix #15547

---
 src/netbuild/NBOwnTLDef.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/netbuild/NBOwnTLDef.cpp b/src/netbuild/NBOwnTLDef.cpp
index fdbc8bad4e02..7101a6c9bd2e 100644
--- a/src/netbuild/NBOwnTLDef.cpp
+++ b/src/netbuild/NBOwnTLDef.cpp
@@ -1017,6 +1017,10 @@ NBOwnTLDef::patchNEMAStateForCrossings(const std::string& state,
     //std::cout << " patchNEMAStateForCrossings green=" << greenEdge->getID() << " other=" << Named::getIDSecure(otherChosen) << " end=" << Named::getIDSecure(end) << " all=" << toString(all) << "\n";
 
     EdgeVector::const_iterator end = std::find(all.begin(), all.end(), endEdge);
+    if (end == all.end()) {
+        // at least prevent an infinite loop
+        end = start;
+    }
     auto it = start;
     NBContHelper::nextCCW(all, it);
     for (; it != end; NBContHelper::nextCCW(all, it)) {