(using a debug build)

Declaring the same namespace multiple times leaks memory. The leak is repeated for every further occurence of the same namespace.

$ cat namesapce.php
<?php
        namespace whatever { }
?>

$ php namesapce.php
$

$ cat namesapce.php
<?php
        namespace whatever { }
        namespace whatever { }
?>
$ php namesapce.php
/home/mfischer/isrc/cvs/php5/Zend/zend_language_scanner.l(1114) :  Freeing 0x401B0B70 (9 bytes), script=namesapce.php

 cat namesapce.php
<?php
        namespace whatever { }
        namespace whatever { }
        namespace whatever { }
?>
$ php namesapce.php
/home/mfischer/isrc/cvs/php5/Zend/zend_language_scanner.l(1114) :  Freeing 0x401B0BF8 (9 bytes), script=namesapce.php
Last leak repeated 1 time