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-rw-r--r--builtin/filterlist.lua6
1 files changed, 6 insertions, 0 deletions
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