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Output for 4.3.0 - 5.0.1, 5.0.3 - 5.6.0rc2, ng@20140507, ng@20140521, ng@20140701, hhvm-3.0.1, hhvm-3.1.0, hhvm-3.2@0529
printf 64-bit signed int '18446744073709551615' (2^64)-1 = 0
Output for 5.0.2
printf 64-bit signed int '18446744073709551615' (2^64)-1 = 4294967295