Fatal error: Uncaught Error: Call to undefined function sum() in /in/Q2bJe:8
Stack trace:
#0 /in/Q2bJe(11): test('sum')
#1 {main}
thrown in /in/Q2bJe on line 8
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/Q2bJe on line 8
Process exited with code 255.