From d844a5f8b74de5586dbefb98f5b2be54e36231ea Mon Sep 17 00:00:00 2001
From: flux <25628292+fluxionary@users.noreply.github.com>
Date: Fri, 9 Dec 2022 10:58:29 -0800
Subject: [PATCH] give a more informative error when trying to register stairs
 for an unregistered node

---
 stairsplus/compat/stairs.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/stairsplus/compat/stairs.lua b/stairsplus/compat/stairs.lua
index 1fb6f6c..69e940b 100644
--- a/stairsplus/compat/stairs.lua
+++ b/stairsplus/compat/stairs.lua
@@ -5,6 +5,8 @@ if not stairsplus.has.stairs then
 	return
 end
 
+local f = string.format
+
 local api = stairsplus.api
 
 local S = stairsplus.S
@@ -19,6 +21,9 @@ function stairs.register_stair(subname, node, groups, tiles, description, sounds
 	local meta = {
 		align_style = worldaligntex and "world" or default_align_style
 	}
+	if not minetest.registered_nodes[node] then
+		error(f("cannot register stairs for unknown node %q", node))
+	end
 	if is_legacy_drawtype(node) then
 		meta.ignore_drawtype = true
 	end