I don't have to close it myself anymore

ccpi.lua

@@ -74,12 +74,10 @@ local function parse(fp)
     elseif magic:sub(1, 3) == "CPI" then
         local version = magic:byte(4, 4)
         if decoders[version] == nil then
-            fp:close()
             return nil, string.format("Invalid CPI version 0x%02x", version)
         end
         res, err = decoders[version](image, fp)
     else
-        fp:close()
         return nil, "Invalid header: expected CCPI got " .. magic
     end