leak.c

int some_method() {
  SOME_STRUCT* reallyBigObject = malloc(sizeof(SOME_STRUCT));

  // FORGET TO DEREFERENCE reallyBigObject
  
  return 42;
}

leak.js

var trolls = (function () {
  var reallyBigObject = eatMemory();

  (function () {
    var lulz = reallyBigObject;
  })();

  // FORGET TO DEREFERENCE reallyBigObject

  return function () {
    return 42;
  };
})();