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<?php echo var_dump(array(NAN == NAN, NAN > NAN, NAN < NAN, NAN <= NAN, NAN >= NAN));
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> bool(false) [1]=> bool(false) [2]=> bool(false) [3]=> bool(false) [4]=> bool(false) }

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