--- a/util/logger.lua	Wed Feb 28 20:06:26 2018 +0100
+++ b/util/logger.lua	Wed Feb 28 20:17:21 2018 +0100
@@ -8,6 +8,8 @@
 -- luacheck: ignore 213/level
 
 local pairs = pairs;
+local ipairs = ipairs;
+local require = require;
 
 local _ENV = nil;
 -- luacheck: std none