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Output for 4.3.5 - 5.6.0rc3, ng@20140507, ng@20140521, ng@20140701, ng@20140801, hhvm-3.0.1, hhvm-3.1.0, hhvm-3.2.0
bool(true)
Output for 4.3.0 - 4.3.4
int(1)