use table.pack()

using_xpcall.lua

@@ -61,7 +61,7 @@ end
 -- same [multiple] values if no error happens. On error, logs it.
 local function safe_wrap(func)
     local function wrap_f(...)
-        local res = {xpcall(func, error_printer, ...)}
+        local res = table.pack(xpcall(func, error_printer, ...))
         if res[1] then
             -- no error, just return rest of the values
             return select(2, unpack(res))