fix: Segfault in UnresolvedManeuverOverride::Turns() on Australia extracts (#7112)

Author: kinkard

CHANGELOG.md

@@ -79,6 +79,7 @@
       - FIXED: Ensure required file check in osrm-routed is correctly enforced. [#6655](https://github.com/Project-OSRM/osrm-backend/pull/6655)
       - FIXED: Correct HTTP docs to reflect summary output dependency on steps parameter. [#6655](https://github.com/Project-OSRM/osrm-backend/pull/6655)
       - ADDED: Extract prerelease/build information from package semver [#6839](https://github.com/Project-OSRM/osrm-backend/pull/6839)
+      - FIXED: Segfault in `UnresolvedManeuverOverride::Turns()` on Australia extracts [#7112](https://github.com/Project-OSRM/osrm-backend/pull/7112)
       - CHANGED: Replaced PL:trunk with PL:expressway to match the latest changes in Polish tagging [#7079](https://github.com/Project-OSRM/osrm-backend/pull/7079)
     - Profiles:
       - FIXED: Bicycle and foot profiles now don't route on proposed ways [#6615](https://github.com/Project-OSRM/osrm-backend/pull/6615)

src/extractor/turn_path_filter.cpp

@@ -42,8 +42,11 @@ std::vector<T> removeInvalidTurnPaths(std::vector<T> turn_relations,
                is_valid_edge(via_node_path.via, via_node_path.to);
     };
 
-    const auto is_valid_way = [is_valid_edge](const auto &via_way_path)
+    const auto is_valid_way = [is_valid_edge](const ViaWayPath &via_way_path)
     {
+        if (!via_way_path.Valid())
+            return false;
+
         if (!is_valid_edge(via_way_path.from, via_way_path.via.front()))
             return false;
 
@@ -59,13 +62,16 @@ std::vector<T> removeInvalidTurnPaths(std::vector<T> turn_relations,
 
     const auto is_invalid = [is_valid_way, is_valid_node](const auto &turn_relation)
     {
-        if (turn_relation.turn_path.Type() == TurnPathType::VIA_NODE_TURN_PATH)
+        switch (turn_relation.turn_path.Type())
         {
+        case TurnPathType::VIA_NODE_TURN_PATH:
             return !is_valid_node(turn_relation.turn_path.AsViaNodePath());
+        case TurnPathType::VIA_WAY_TURN_PATH:
+            return !is_valid_way(turn_relation.turn_path.AsViaWayPath());
+        default:
+            break;
         }
-
-        BOOST_ASSERT(turn_relation.turn_path.Type() == TurnPathType::VIA_WAY_TURN_PATH);
-        return !is_valid_way(turn_relation.turn_path.AsViaWayPath());
+        return true;
     };
 
     const auto end_valid_relations =