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<?php var_dump(isset($a)); var_dump(is_object($a)); $b = null; var_dump(isset($b)); var_dump(is_object($b));
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) Warning: Undefined variable $a in /in/4IkZC on line 3 bool(false) bool(false) bool(false)

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