From 9389c6564fccbe7c26440aa6e1d2c81a2556d4f7 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Fri, 13 Mar 2020 16:46:54 +0000
Subject: [PATCH] Nasal geodinfo: warn when scenery is not loaded

---
 src/Scripting/NasalPositioned.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Scripting/NasalPositioned.cxx b/src/Scripting/NasalPositioned.cxx
index 1246ad951..a78f04add 100644
--- a/src/Scripting/NasalPositioned.cxx
+++ b/src/Scripting/NasalPositioned.cxx
@@ -1457,8 +1457,10 @@ static naRef f_geodinfo(naContext c, naRef me, int argc, naRef* args)
   if (scenery == nullptr)
     return naNil();
 
-  if(!scenery->get_elevation_m(geod, elev, &material))
-    return naNil();
+    if(!scenery->get_elevation_m(geod, elev, &material)) {
+        SG_LOG(SG_TERRAIN, SG_DEV_WARN, "Nasal geodinfo() querying location with no loaded tiles:" << geod);
+        return naNil();
+    }
 
   naRef vec = naNewVector(c);
   naVec_append(vec, naNum(elev));