Description:
------------
I'm on 5.4.14
I won't upgrade to test this, if someone have 5.4.21, can he tests and reports.

If you call a constant of a class in a trait (of that class), it works.

BUT, if you want to test its existence by 'defined' it's always return false.



Test script:
---------------
class MyClass{

  use MyTrait;
  const MY_CONST = 'TEST';

}

Trait MyTrait{
  public function testConst()
  {
    echo self::MY_CONST;
    var_dump(defined(self::MY_CONST));
  }
}

$myClass = new MyClass();
$myClass->testConst();

Expected result:
----------------
Test
boolean true

Actual result:
--------------
Test
boolean false