From f26672a38b4d71d1348515f3bd5ae15526f67288 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 28 Dec 2021 15:31:35 +0100
Subject: [PATCH] msProjectCreateReprojector() PROJ < 6 case: avoid potential
 crash in later calls (related to next commit)

---
 mapproject.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mapproject.c b/mapproject.c
index cd5bd15349..0a540727cb 100644
--- a/mapproject.c
+++ b/mapproject.c
@@ -559,6 +559,12 @@ reprojectionObj* msProjectCreateReprojector(projectionObj* in, projectionObj* ou
     {
         obj->no_op = MS_TRUE;
     }
+    else if( (in == NULL || in->proj == NULL) &&
+             (out == NULL || out->proj == NULL) )
+    {
+        msProjectDestroyReprojector(obj);
+        return NULL;
+    }
     return obj;
 }