From 1c5243721cfc4031a9da4976c56d2d69dca8e711 Mon Sep 17 00:00:00 2001
From: Nabil Ghodbane <nabil.ghodbane@cea.fr>
Date: Thu, 4 May 2023 16:45:45 +0200
Subject: [PATCH] spns #33658: in case environment variable does not exist,
 getenv returns nullptr, which triggers an exception

Test rewrite parameter first, then check if environment variable is nullptr, and finally check if environment variable exists but is empty

Useful for setting MeshGems license
---
 src/Basics/Basics_Utils.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Basics/Basics_Utils.cxx b/src/Basics/Basics_Utils.cxx
index 1725a319c..63fe64c69 100644
--- a/src/Basics/Basics_Utils.cxx
+++ b/src/Basics/Basics_Utils.cxx
@@ -175,7 +175,7 @@ namespace Kernel_Utils
   {
     std::stringstream sstr;
     sstr<<name<<'='<<value;
-    if(rewrite || std::string(getenv(name)).length() == 0)
+    if(rewrite || getenv(name) == nullptr || std::string(getenv(name)).length() == 0)
       return _putenv(sstr.str().c_str());
     else return -1;
   }
-- 
2.39.2