How to reproduce?

config:

'no-var': ['error']

code:

var fx = function (i = 0) {
  if (i < 5) {
    return fx(i + 1);
  }
  console.log(i);
};

fx();

What did you expect to happen?

var fx autofixed to let fx

I tried the code in a sandpit and it behaves the same.

What actually happened?

not autofixed, Unexpected var, use let or const instead no-var error is generated

(autofix of var -> let works in other cases, the problem is present only when the variable is referred in anonymous function in the same declaration)