Fatal error: Uncaught ValueError: func_get_arg(): Argument #1 ($position) must be greater than or equal to 0 in /in/khFQA:4
Stack trace:
#0 /in/khFQA(4): func_get_arg(-1)
#1 /in/khFQA(7): x()
#2 {main}
thrown in /in/khFQA on line 4
Process exited with code 255.