From 907797ba1154e07970e23ec629bdc05817180ef4 Mon Sep 17 00:00:00 2001
From: Jat15 <jinan15@hotmail.com>
Date: Fri, 25 May 2018 03:01:24 +0200
Subject: Fix crash if sign is "unknown block"

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

diff --git a/init.lua b/init.lua
index f5b39c7..bd16ecb 100644
--- a/init.lua
+++ b/init.lua
@@ -950,7 +950,7 @@ signs_text_on_activate = function(self)
 	local meta = minetest.get_meta(pos)
 	local text = meta:get_string("text")
 	local new = (meta:get_int("__signslib_new_format") ~= 0)
-	if text then
+	if text and minetest.registered_nodes[minetest.get_node(pos).name] then
 		text = trim_input(text)
 		set_obj_text(self.object, text, new, pos)
 	end
-- 
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