Description:
------------
When a PHP closure is created, it is supposed to capture the late bound class of the enclosing function. There are a number of cases involving derived classes and static methods or static closures (or both) where it doesn't work correctly.

The test script I've included demonstrates the problem. I've tested it on PHP 5.6.0alpha1, but I can also reproduce the problem on various builds of PHP 5.5.

Test script:
---------------
<?php
class A {
  static function name() { return 'A'; }
  function foo() {
    $fn = function() { return static::name(); };
    echo static::name() . ' vs ' . $fn() . "\n";
  }
  function bar() {
    $fn = static function() { return static::name(); };
    echo static::name() . ' vs ' . $fn() . "\n";
  }
  static function baz() {
    $fn = function() { return static::name(); };
    echo static::name() . ' vs ' . $fn() . "\n";
  }
}
class B extends A {
  static function name() { return 'B'; }
}
function test() {
  (new B)->foo();
  B::foo();
  (new B)->baz();
  B::baz();
  (new B)->bar();
  B::bar();
}
test();

Expected result:
----------------
B vs B
B vs B
B vs B
B vs B
B vs B
B vs B

Actual result:
--------------
B vs B
B vs A
B vs A
B vs A
B vs A
B vs A