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<?php class Foo { public function __toString() { throw new Exception('test'); } } echo new Foo;
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Exception: test in /in/f7BLm:4 Stack trace: #0 /in/f7BLm(8): Foo->__toString() #1 {main} thrown in /in/f7BLm on line 4
Process exited with code 255.
Output for 7.0.1 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Method Foo::__toString() must not throw an exception, caught Exception: test in /in/f7BLm on line 0
Process exited with code 255.
Output for 5.3.0 - 5.3.2, 5.3.18 - 5.3.29, 5.4.8 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0
Fatal error: Method Foo::__toString() must not throw an exception in /in/f7BLm on line 0
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.3 - 5.3.17, 5.4.0 - 5.4.7
Fatal error: Method Foo::__toString() must not throw an exception in /in/f7BLm on line 8
Process exited with code 255.
Output for 5.0.5, 5.1.0 - 5.1.6
Fatal error: Uncaught exception 'Exception' with message 'test' in /in/f7BLm:4 Stack trace: #0 /in/f7BLm(8): Foo->__toString() #1 {main} thrown in /in/f7BLm on line 4
Process exited with code 255.
Output for 5.0.3 - 5.0.4
Fatal error: Uncaught exception 'Exception' with message 'test' in /in/f7BLm:4 Stack trace: #0 /in/f7BLm(4): Foo::__toString() #1 /in/f7BLm(8): Foo->__toString() #2 /in/f7BLm(8): unknown() #3 {main} thrown in /in/f7BLm on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.2
Fatal error: Uncaught exception 'Exception' with message 'test' in /in/f7BLm:4 Stack trace: #0 /in/f7BLm(8): Foo->__toString() #1 /in/f7BLm(8): unknown() #2 {main} thrown in /in/f7BLm on line 4
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/f7BLm on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/f7BLm 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/f7BLm on line 3
Process exited with code 255.

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