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run code in 150+ php & hhvm versions
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<?hh class A {} class B {} function foo(): A { try { return new B; } finally { return new B; } } foo();
based on kcHQL
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.34
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/Xa06o on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.32
<?hh class A {} class B {} function foo(): A { try { return new B; } finally { return new B; } } foo();