Description:
------------
When creating an object which has as property an object of the same class - this creates an infinite loop -, the page doesn't display (that's normal) but no error is raised.

Reproduce code:
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class A {
 private $B;

 public function __construct() {
  $this->B = new A();
 }
}

Expected result:
----------------
PHP should bug and raise an error.

Actual result:
--------------
Nothing. Blank page and no error raised.