Fatal error: Uncaught ArgumentCountError: Too few arguments to function f(), 0 passed in /in/tBtKh on line 7 and exactly 1 expected in /in/tBtKh:5
Stack trace:
#0 /in/tBtKh(7): f()
#1 {main}
thrown in /in/tBtKh on line 5
Process exited with code 255.
Warning: Missing argument 1 for f(), called in /in/tBtKh on line 7 and defined in /in/tBtKh on line 5
Notice: Undefined variable: a in /in/tBtKh on line 5
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