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<?php $instance = new stdClass; var_dump(serialize([1, 2, 3, 5 => $instance, [$instance]]));
Output for git.master, git.master_jit, rfc.property-hooks
string(71) "a:5:{i:0;i:1;i:1;i:2;i:2;i:3;i:5;O:8:"stdClass":0:{}i:6;a:1:{i:0;r:5;}}"

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