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<?php class Foo { public function bar(self $baz) {}} var_dump((new ReflectionParameter('Foo::bar', 'baz'))->getClass());
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught ReflectionException: Function Foo::bar() does not exist in /in/oDngM:6 Stack trace: #0 /in/oDngM(6): ReflectionParameter->__construct('Foo::bar', 'baz') #1 {main} thrown in /in/oDngM on line 6
Process exited with code 255.
Output for hhvm-3.12.0
object(ReflectionClass)#3 (2) { ["name"]=> string(3) "Foo" ["obj":"ReflectionClass":private]=> NULL }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.6.28
Fatal error: Uncaught exception 'ReflectionException' with message 'Function Foo::bar() does not exist' in /in/oDngM:6 Stack trace: #0 /in/oDngM(6): ReflectionParameter->__construct('Foo::bar', 'baz') #1 {main} thrown in /in/oDngM on line 6
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/oDngM on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/oDngM on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/oDngM on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/oDngM on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/oDngM on line 3
Process exited with code 255.