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<?php class test { function __toString() { throw new exception("test!"); } } $foo = new test(); $bar = (string)$foo;
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Exception: test! in /in/M1NDQ:7 Stack trace: #0 /in/M1NDQ(12): test->__toString() #1 {main} thrown in /in/M1NDQ on line 7
Process exited with code 255.
Output for 7.0.1 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33
Fatal error: Method test::__toString() must not throw an exception, caught Exception: test! in /in/M1NDQ 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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0
Fatal error: Method test::__toString() must not throw an exception in /in/M1NDQ 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 test::__toString() must not throw an exception in /in/M1NDQ on line 12
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_NEW in /in/M1NDQ on line 7
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_NEW in /in/M1NDQ on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/M1NDQ on line 7
Process exited with code 255.

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