Lazy loaders not worked as suspected

[litmit]

Try this code (simulate index.js loaders)

test.js

var obj = {};

Object.defineProperties(obj, {

  'util': {
    get: function() {
      console.log('wrapper called');
      return obj.util = require('util');
    }
  },
});

obj.util.isArray([]);
obj.util.isArray("");

node test.js
Output:

wrapper called
wrapper called

I think this is behavior that was not suspected.

Moreover:
node --use-strict test.js
Output:

wrapper called

TypeError: Cannot set property util of #<Object> which has only a getter
    at Object.defineProperties.util.get (test.js:8:23)
    at Object.<anonymous> (test.js:13:4)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:902:3

---

Well working code snippet:
test.js

var obj = {};

Object.defineProperties(obj, {

  'util': {
    get: function() {
      console.log('wrapper called');
      delete obj.util;
      return obj.util = require('util');
    },
    configurable: true
  },
});

obj.util.isArray([]);
obj.util.isArray("");

Run the test:
node --use-strict test.js
Output:

wrapper called

[3rd-Eden]

Great find, this indeed seems to cause some pointless overhead. We could just use https://github.com/observing/initialise for the lazyloading which just takes care of every need there would ever be.