BC break in 5.4.29 and 5.5.13

Hi. Following http://news.php.net/php.internals/73957 This change breaks at least doctrine and phpunit. Source code: https://github.com/doctrine/doctrine2/blob/master/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php#L911 https://github.com/sebastianbergmann/phpunit-mock-objects/blob/master/src/Framework/MockObject/Generator.php#L274 Something like, (used to not call __construct) : $object = unserialize(sprintf('O:%d:"%s":0:{}', strlen($className), $className) Big reproducer: # pear channel-discover pear.horde.org # pear install horde/Horde_Test # pear install horde/Horde_Imap_Client # pear download horde/Horde_Imap_Client # tar xf Horde_Imap_Client-2.20.0.tgz # cd Horde_Imap_Client-2.20.0/ # cd test/Horde/Imap/Client/ # wget https://phar.phpunit.de/phpunit.phar # php phpunit.phar . PHPUnit 4.1.0 by Sebastian Bergmann. Configuration read from /root/Horde_Imap_Client-2.20.0/test/Horde/Imap/Client/phpunit.xml ...............EEEEEEEEEEEEEEEEEEEEEEEEEEEE.................... 63 / 211 ( 29%) .................................FF............................ 126 / 211 ( 59%) SS............................................................. 189 / 211 ( 89%) ...................... Time: 1.07 seconds, Memory: 18.50Mb There were 28 errors: 1) Horde_Imap_Client_Cache_CacheTest::testGet Erroneous data format for unserializing 'Mock_Horde_Imap_Client_Socket_1e0b6300' /root/Horde_Imap_Client-2.20.0/test/Horde/Imap/Client/Cache/TestBase.php:36 phar:///root/Horde_Imap_Client-2.20.0/test/Horde/Imap/Client/phpunit.phar/phpunit/TextUI/Command.php:179 phar:///root/Horde_Imap_Client-2.20.0/test/Horde/Imap/Client/phpunit.phar/phpunit/TextUI/Command.php:132 2) Horde_Imap_Client_Cache_CacheTest::testGetCachedUids Erroneous data format for unserializing 'Mock_Horde_Imap_Client_Socket_1e0b6300' .... Remi.