From f8cf65de542cbb7d933655f51ecf13d1a5046e79 Mon Sep 17 00:00:00 2001
From: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
Date: Sun, 13 Nov 2022 17:02:50 +0100
Subject: [PATCH] add nil check

---
 conditions.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/conditions.lua b/conditions.lua
index ba80070..0fc3250 100644
--- a/conditions.lua
+++ b/conditions.lua
@@ -82,7 +82,7 @@ building_lib.register_condition("group", {
 		local building_info = building_lib.get_placed_building_info(mapblock_pos)
 		if building_info then
 			local building_def = building_lib.get_building(building_info.name)
-			if building_def and building_def.groups[value] then
+			if building_def and building_def.groups and building_def.groups[value] then
 				return true
 			end
 		end