From 12fb09f452364da6c2986db5b35190c61d0b1d64 Mon Sep 17 00:00:00 2001
From: beyondlimits <beyondlimits@10g.pl>
Date: Wed, 18 Jul 2018 21:49:34 +0200
Subject: [PATCH] Fix crash when error()ing an invalid value on programming
 (#418)

---
 mesecons_luacontroller/init.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mesecons_luacontroller/init.lua b/mesecons_luacontroller/init.lua
index 325e16f..59c2442 100644
--- a/mesecons_luacontroller/init.lua
+++ b/mesecons_luacontroller/init.lua
@@ -718,7 +718,7 @@ local function on_receive_fields(pos, form_name, fields, sender)
 	local ok, err = set_program(pos, fields.code)
 	if not ok then
 		-- it's not an error from the server perspective
-		minetest.log("action", "Lua controller programming error: " .. err)
+		minetest.log("action", "Lua controller programming error: " .. tostring(err))
 	end
 end