Fatal error: Uncaught ArgumentCountError: Too few arguments to function f(), 1 passed in /in/ibun3 on line 6 and exactly 2 expected in /in/ibun3:2
Stack trace:
#0 /in/ibun3(6): f(1)
#1 {main}
thrown in /in/ibun3 on line 2
Process exited with code 255.
Warning: Missing argument 2 for f(), called in /in/ibun3 on line 6 and defined in /in/ibun3 on line 2
Notice: Undefined variable: b in /in/ibun3 on line 3