From b2b2b9364d7dac5a96924b753b588f40ee415ff0 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Thu, 15 Nov 2018 20:48:20 +0100
Subject: [PATCH] Warn about invalid //stretch usage

---
 ChatCommands.md             | 6 +++---
 worldedit_commands/init.lua | 5 ++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/ChatCommands.md b/ChatCommands.md
index ea1f955..528f2df 100644
--- a/ChatCommands.md
+++ b/ChatCommands.md
@@ -289,9 +289,9 @@ Stack the current WorldEdit region `<count>` times by offset `<x>`, `<y>`, `<z>`
 
 Scale the current WorldEdit positions and region by a factor of `<stretchx>`, `<stretchy>`, `<stretchz>` along the X, Y, and Z axes, repectively, with position 1 as the origin.
 
-    //scale 2 2 2
-    //scale 1 2 1
-    //scale 10 20 1
+    //stretch 2 2 2
+    //stretch 1 2 1
+    //stretch 10 20 1
 
 ### `//transpose x/y/z/? x/y/z/?`
 
diff --git a/worldedit_commands/init.lua b/worldedit_commands/init.lua
index 131c49b..763e895 100644
--- a/worldedit_commands/init.lua
+++ b/worldedit_commands/init.lua
@@ -905,9 +905,12 @@ minetest.register_chatcommand("/stretch", {
 		stretchx, stretchy, stretchz = tonumber(stretchx), tonumber(stretchy), tonumber(stretchz)
 		if stretchx == 0 or stretchy == 0 or stretchz == 0 then
 			worldedit.player_notify(name, "invalid scaling factors: " .. param)
+			return nil
 		end
 		local count = check_region(name, param)
-		if count then return tonumber(stretchx) * tonumber(stretchy) * tonumber(stretchz) * count end
+		if count then
+			return stretchx * stretchy * stretchz * count
+		end
 		return nil
 	end),
 })