From dde4761e9d8dc5b7d8524286349a19ea3eb9e6eb Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sun, 23 Apr 2023 11:59:58 +0100
Subject: [PATCH] Fix: Violation of strict weak ordering in engine
 value/running cost sorter

---
 src/build_vehicle_gui.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
index 47b5c8276b..4015639bb9 100644
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -418,7 +418,7 @@ static bool GenericEngineValueVsRunningCostSorter(const GUIEngineListItem &a, co
 	 * since we want consistent sorting.
 	 * Also if both have no power then sort with reverse of running cost to simulate
 	 * previous sorting behaviour for wagons. */
-	if (v_a == 0 && v_b == 0) return !EngineRunningCostSorter(a, b);
+	if (v_a == 0 && v_b == 0) return EngineRunningCostSorter(b, a);
 	if (v_a == v_b)  return EngineNumberSorter(a, b);
 	return _engine_sort_direction != (v_a < v_b);
 }