From 7b78270f4bb8437ab1e69e8b8d8e4037f2f86276 Mon Sep 17 00:00:00 2001
From: Dennis Luxen <info@project-osrm.org>
Date: Mon, 2 Jun 2014 19:23:50 +0200
Subject: [PATCH] safe-guard against broken input data

---
 Extractor/ExtractorCallbacks.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Extractor/ExtractorCallbacks.cpp b/Extractor/ExtractorCallbacks.cpp
index 4acc19a4f..f493400d3 100644
--- a/Extractor/ExtractorCallbacks.cpp
+++ b/Extractor/ExtractorCallbacks.cpp
@@ -68,6 +68,11 @@ void ExtractorCallbacks::ProcessWay(ExtractionWay &parsed_way)
         return;
     }
 
+    if (parsed_way.path.size() <= 1)
+    { // safe-guard against broken data
+        return;
+    }
+
     if (std::numeric_limits<unsigned>::max() == parsed_way.id)
     {
         SimpleLogger().Write(logDEBUG) << "found bogus way with id: " << parsed_way.id
@@ -110,7 +115,7 @@ void ExtractorCallbacks::ProcessWay(ExtractionWay &parsed_way)
     const bool split_bidirectional_edge =
         (parsed_way.backward_speed > 0) && (parsed_way.speed != parsed_way.backward_speed);
 
-    for (unsigned n = 0; n < parsed_way.path.size() - 1; ++n)
+    for (unsigned n = 0; n < (parsed_way.path.size() - 1); ++n)
     {
         external_memory.all_edges_list.push_back(InternalExtractorEdge(
             parsed_way.path[n],