From f247451c61d8b7da4803add2208413bcd1639e16 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Sun, 21 Jan 2024 02:07:32 +0000
Subject: [PATCH] Fix division by zero when wrapping lateness_counter with 0
 timetable duration

---
 src/timetable_cmd.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/timetable_cmd.cpp b/src/timetable_cmd.cpp
index 5823912c54..726f63a7d6 100644
--- a/src/timetable_cmd.cpp
+++ b/src/timetable_cmd.cpp
@@ -1044,7 +1044,11 @@ void UpdateVehicleTimetable(Vehicle *v, bool travelling)
 	if (v->lateness_counter > (int)timetabled) {
 		Ticks cycle = v->orders->GetTimetableTotalDuration();
 		if (cycle != INVALID_TICKS && v->lateness_counter > cycle) {
-			v->lateness_counter %= cycle;
+			if (cycle == 0) {
+				v->lateness_counter = 0;
+			} else {
+				v->lateness_counter %= cycle;
+			}
 		}
 	}