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<?php try { $x = new NonexistantClass(); } catch (Exception $e) { var_dump($e->getMessage()); } echo "Don't worry, everything is still fine!\n";
Output for 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 Error: Class "NonexistantClass" not found in /in/LGM0o:4 Stack trace: #0 {main} thrown in /in/LGM0o on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Class 'NonexistantClass' not found in /in/LGM0o:4 Stack trace: #0 {main} thrown in /in/LGM0o on line 4
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.30
Fatal error: Class 'NonexistantClass' not found in /in/LGM0o on line 4
Process exited with code 255.

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