From b731b6265344530b4ee810e8e0eba0b500d40b4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?LAURENS=20J=C3=A9r=C3=B4me?= <jerome.laurens@u-bourgogne.fr>
Date: Sat, 3 Aug 2024 08:26:10 +0200
Subject: [PATCH] Update class.lua

According to the documentation, `compat.getfenv` may return nil such that `env` may be nil.
---
 lua/pl/class.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lua/pl/class.lua b/lua/pl/class.lua
index cd041c82..98b5c2ac 100644
--- a/lua/pl/class.lua
+++ b/lua/pl/class.lua
@@ -227,7 +227,9 @@ class = setmetatable({},{
         return function(...)
             local c = _class(...)
             c._name = key
-            rawset(env,key,c)
+            if env then
+                rawset(env,key,c)
+            end
             return c
         end
     end