Anonymous functions don't delete

[Kirko]

I noticed that these functions don't delete and are stored until I clearVars. Is this normal or should I be doing something to clear them? I tried to destroy the function after I use it but that didn't work.

PHP Code:

function onCreated() {
  //this.clearVars(); // Will clear it

  temp.fn = function(result) {
    printf("Test: %d", result);
  };
  test(5, 5, fn);

  temp.fn.destroy();  // Function function_2107071_1.destroy not found at line 9

  echo("Errors: " @ this.scriptErrors);
  echo("Useless crap: " @ getStringKeys("this.function").size()); // Goes up everyime script is updated
}


function test(a, b, callback) {
  (@ callback)(a + b);
}