Description:
------------
When running a simple file that only instantiates objects using autoload, there is a memory leak.

The leak appears to be caused by some combination of string concatenation and exception throwing.  The line that causes the leak is in Pyrus/src/Pyrus/Registry/Sqlite3.php in the constructor:

        if ($path && $path != ':memory:') {
            if (dirname($path) . DIRECTORY_SEPARATOR . '.pear2registry' != $path) {
                $path = $path . DIRECTORY_SEPARATOR . '.pear2registry';
            }
        }

The line "$path = $path . DIRECTORY_SEPARATOR . '.pear2registry';"

leaks the value "/usr/local/lib/php/.pear2registry" on my machine, and the zval allocated for $path.

Reproduce code:
---------------
<?php
// run from checkout of http://svn.pear.php.net/PEAR2/all
function __autoload($class)
{
    if ($class == 'PEAR2_Exception') {
        include __DIR__ . '/Exception/src/Exception.php';
        return;
    }
    $class = str_replace('PEAR2_', '', $class);
    $class = str_replace('_', '/', $class);
    include __DIR__ . '/Pyrus/src/' . $class . '.php';
}
$a = PEAR2_Pyrus_Config::current();


Expected result:
----------------
no output

Actual result:
--------------
user@ubuntu8041:~/workspace/all/Pyrus/tests/AtomicFileTransaction/rmrf$ php -n test.phpt
[Sun May  3 22:58:31 2009]  Script:  'test.phpt'
/home/user/workspace/php5/Zend/zend_execute.c(723) :  Freeing 0xB7B52AE4 (20 bytes), script=test.phpt
[Sun May  3 22:58:31 2009]  Script:  'test.phpt'
/home/user/workspace/php5/Zend/zend_operators.c(1231) :  Freeing 0x088CE1EC (34 bytes), script=test.phpt
=== Total 2 memory leaks detected ===