Fatal error: Uncaught Error: Call to undefined function sum() in /in/c9n8h:5
Stack trace:
#0 {main}
thrown in /in/c9n8h on line 5
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined function sum() in /in/c9n8h on line 5
Process exited with code 255.