//walls: Prevent crash if not parameters are specified by defaulting to dirt as the replace_node

CHANGELOG.md

@@ -30,6 +30,7 @@ Note to self: See the bottom of this file for the release template text.
  - `//replacemix`: Improve error handling to avoid crashes (thanks, Jonathon for reporting via Discord!)
  - Cloud wand: Improve chat message text
  - Fix `bonemeal` mod detection to look for the global `bonemeal`, not whether the `bonemeal` mod name has been loaded
+ - `//walls`: Prevent crash if not parameters are specified by defaulting to `dirt` as the replace_node
 
 
 ## v1.12: The selection tools update (26th June 2021)

Chat-Command-Reference.md

@@ -146,10 +146,11 @@ Additional examples:
 ```
 
 
-### `//walls <replace_node> [<thickness=1>]`
-Creates vertical walls of `<replace_node>` around the inside edges of the defined region, optionally specifying the thickness thereof.
+### `//walls [<replace_node=dirt> [<thickness=1>]]`
+Creates vertical walls of `<replace_node>` around the inside edges of the defined region, optionally specifying the thickness thereof. Defaults to a replace node of `dirt` and a wall thickness of 1.
 
 ```weacmd
+//walls
 //walls dirt
 //walls stone
 //walls goldblock

worldeditadditions_commands/commands/walls.lua

@@ -4,11 +4,12 @@
 -- ██ ███ ██ ██   ██ ██      ██           ██
 --  ███ ███  ██   ██ ███████ ███████ ███████
 worldedit.register_command("walls", {
-	params = "<replace_node> [<thickness=1>]",
+	params = "[<replace_node=dirt> [<thickness=1>]]",
 	description = "Creates vertical walls of <replace_node> around the inside edges of the defined region. Optionally specifies a thickness for the walls to be created (defaults to 1)",
 	privs = { worldedit = true },
 	require_pos = 2,
 	parse = function(params_text)
+		if not params_text or params_text == "" then params_text = "dirt" end
 		local parts = worldeditadditions.split_shell(params_text)
 		
 		local target_node