rescript convert: incorrect conversion of function keyword

[cknitt]

The following code example is from jscomp/stdlib-406/list.ml, but the same issue occurs in many places in the OCaml stdlib code and prevents successful conversion from OCaml syntax to ReScript syntax.

rescript convert converts

let rec mem x = function
  | [] -> false
  | a :: l -> compare a x = 0 || mem x l

to

let rec mem = (x, x) =>
  switch x {
  | list{} => false
  | list{a, ...l} => compare(a, x) == 0 || mem(x, l)
  }

instead of something like

let rec mem = (x, param) =>
  switch param {
  | list{} => false
  | list{a, ...l} => compare(a, x) == 0 || mem(x, l)
  }

[cristianoc]

Yes need to rename the x before converting an anonymous function from .ml.