From 444331501f26f58a8bfbac93d9fb4a3f87336c8d Mon Sep 17 00:00:00 2001
From: Corentin Le Molgat <corentinl@google.com>
Date: Mon, 24 Nov 2025 08:29:59 +0100
Subject: [PATCH] routing: export filters update from google3

---
 ortools/constraint_solver/routing_filters.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ortools/constraint_solver/routing_filters.cc b/ortools/constraint_solver/routing_filters.cc
index 9e194bb6d0..8ec9f76568 100644
--- a/ortools/constraint_solver/routing_filters.cc
+++ b/ortools/constraint_solver/routing_filters.cc
@@ -172,6 +172,8 @@ class MaxActiveVehiclesFilter : public IntVarLocalSearchFilter {
         routing_model_(routing_model),
         is_active_(routing_model.vehicles(), false),
         active_vehicles_(0) {}
+  ~MaxActiveVehiclesFilter() override = default;
+  std::string DebugString() const override { return "MaxActiveVehiclesFilter"; }
   bool Accept(const Assignment* delta, const Assignment* /*deltadelta*/,
               int64_t /*objective_min*/, int64_t /*objective_max*/) override {
     const int64_t kUnassigned = -1;