From f72983e1a6e1b1164a27a3c2a58915039a7d7ea4 Mon Sep 17 00:00:00 2001
From: James Turner <james@flightgear.org>
Date: Wed, 4 Aug 2021 09:08:02 +0100
Subject: [PATCH] TrafficL Avoid crash on invalid active runway

Work-around + log message when the AI flight has an invalid
arrival runway.
---
 src/AIModel/AIFlightPlanCreate.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/AIModel/AIFlightPlanCreate.cxx b/src/AIModel/AIFlightPlanCreate.cxx
index 04d365d2b..0dcd86e71 100644
--- a/src/AIModel/AIFlightPlanCreate.cxx
+++ b/src/AIModel/AIFlightPlanCreate.cxx
@@ -989,6 +989,11 @@ bool FGAIFlightPlan::createLanding(FGAIAircraft * ac, FGAirport * apt,
     double decelMetric      = decel       * SG_KT_TO_MPS;
 
     char buffer[12];
+    if (!apt->hasRunwayWithIdent(activeRunway)) {
+        SG_LOG(SG_AI, SG_WARN, "FGAIFlightPlan::createLanding: No such runway " << activeRunway << " at " << apt->ident());
+        return false;
+    }
+
     FGRunway * rwy = apt->getRunwayByIdent(activeRunway);
     if (!rwy)
         return false;