From 42cd70a86237d2acc1d2861bad9f6c18e0e2ee93 Mon Sep 17 00:00:00 2001
From: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
Date: Mon, 19 Dec 2022 08:23:01 +0100
Subject: [PATCH] file checks

---
 mtt.lua       | 2 +-
 serialize.lua | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/mtt.lua b/mtt.lua
index 6a74185..c9070b0 100644
--- a/mtt.lua
+++ b/mtt.lua
@@ -18,7 +18,7 @@ mtt.register("register and export", function(callback)
 end)
 
 
-mtt.register("serlize_chunk", function(callback)
+mtt.register("serialize_chunk", function(callback)
     local pos1 = { x=0, y=0, z=0 }
     local pos2 = { x=20, y=20, z=20 }
 
diff --git a/serialize.lua b/serialize.lua
index b1190c0..54cc5a9 100644
--- a/serialize.lua
+++ b/serialize.lua
@@ -5,6 +5,10 @@ local char, encode_uint16, insert = string.char, mapsync.encode_uint16, table.in
 
 function mapsync.serialize_chunk(chunk_pos, filename)
     local f = global_env.io.open(filename, "w")
+    if not f then
+        return false, "could not open '" .. filename .. "'"
+    end
+
     local zip = mtzip.zip(f)
 
     local blockdata_list = {}