Avoid crash if place a stair like node on colored one of same categorie

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [2.2.0] - 2021-06-28
+
 ### Changed
 
 - Refactored recipe override mechanism to avoid re-coding recipes
@@ -131,7 +133,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Initial versioned release.
 
-[Unreleased]: https://github.com/minetest-mods/moreblocks/compare/v2.1.0...HEAD
+[Unreleased]: https://github.com/minetest-mods/moreblocks/compare/v2.2.0...HEAD
+[2.2.0]: https://github.com/minetest-mods/moreblocks/compare/v2.1.0...v2.2.0
 [2.1.0]: https://github.com/minetest-mods/moreblocks/compare/v2.0.0...v2.1.0
 [2.0.0]: https://github.com/minetest-mods/moreblocks/compare/v1.3.0...v2.0.0
 [1.3.0]: https://github.com/minetest-mods/moreblocks/compare/v1.2.0...v1.3.0

stairsplus/common.lua

@@ -49,6 +49,8 @@ stairsplus.rotate_node_aux = function(itemstack, placer, pointed_thing)
 	local under = pointed_thing.under
 	local under_node = minetest.get_node(under)
 	local under_prefix = under_node and name_to_category(under_node.name)
+	-- NALC Addition to avoid coloredwood/unifiedbricks crash by Sys4
+	local under_pmod = string.sub(under_node.name, 1, string.find(under_node.name, ":")-1)
 
 	local same_cat = item_prefix == under_prefix
 
@@ -65,7 +67,8 @@ stairsplus.rotate_node_aux = function(itemstack, placer, pointed_thing)
 	-- under node has a non-standard shape, so use the distance between under and above
 	local wallmounted = minetest.dir_to_wallmounted(vector.subtract(pointed_thing.above, under))
 
-	if same_cat and not aux then
+	if same_cat and (under_pmod ~= "coloredwood" and under_pmod ~= "unifiedbricks")
+	and not aux then
 		p2 = under_node.param2
 		-- flip if placing above or below an upright or upside-down node
 		-- TODO should we also flip when placing next to a side-mounted node?