From: sapier <Sapier at GMX dot net>
Date: Sat, 24 Aug 2013 22:43:20 +0000 (+0200)
Subject: Add sanity check to sort function
X-Git-Tag: 0.4.8~164
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=848998003939d1617dad649dc9842b11ffc83ead;p=oweals%2Fminetest.git

Add sanity check to sort function
---

diff --git a/builtin/filterlist.lua b/builtin/filterlist.lua
index fd337ae92..1c2ceb031 100644
--- a/builtin/filterlist.lua
+++ b/builtin/filterlist.lua
@@ -240,6 +240,12 @@ end
 function sort_worlds_alphabetic(this) 
 
 	table.sort(this.m_processed_list, function(a, b)
+		--fixes issue #857 (crash due to sorting nil in worldlist)
+		if a == nil or b == nil then
+			if a == nil and b ~= nil then return false end
+			if b == nil and a ~= nil then return true end
+			return false
+		end
 		if a.name:lower() == b.name:lower() then
 			return a.name < b.name
 		end