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<?php $class = 'PDO'; var_dump(unserialize(sprintf( 'O:%d:"%s":0:{}', strlen($class), $class )));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Exception: Unserialization of 'PDO' is not allowed in /in/6Sgjt:4 Stack trace: #0 /in/6Sgjt(4): unserialize('O:3:"PDO":0:{}') #1 {main} thrown in /in/6Sgjt on line 4
Process exited with code 255.

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