Fatal error: Uncaught Error: Value of type null is not callable in /in/JN7pl:11
Stack trace:
#0 /in/JN7pl(15): {closure}('abc')
#1 /in/JN7pl(19): {closure}('abc')
#2 {main}
thrown in /in/JN7pl on line 11
Process exited with code 255.
Fatal error: Uncaught Error: Function name must be a string in /in/JN7pl:11
Stack trace:
#0 /in/JN7pl(15): {closure}('abc')
#1 /in/JN7pl(19): {closure}('abc')
#2 {main}
thrown in /in/JN7pl on line 11
Process exited with code 255.