Parameter name repeated in function declaration in compiled output

[bandersongit]

Compiling the following function from this file

  let purple = (~underline=false, ~invert=false, ~dim=false, ~bold=false, s) =>
    <Pastel underline inverse=invert dim bold color=Magenta> s </Pastel>;

Results in generated output with duplicate paramater names (parameter s is both the second and the last parameter)

JS

function purple(opt, s, r, q, s) {
  if (opt) {
    var sth = opt[1];
    var underline = sth;
  }
  else var underline = 0;
  if (s) {
    var sth__0 = s[1];
    var invert = sth__0;
  }
  else var invert = 0;
  if (r) {
    var sth__1 = r[1];
    var dim = sth__1;
  }
  else var dim = 0;
  if (q) {
    var sth__2 = q[1];
    var bold = sth__2;
  }
  else var bold = 0;
  return call12(
    Pastel[36],
    0,
    [0,bold],
    [0,dim],
    0,
    [0,underline],
    [0,invert],
    0,
    0,
    f,
    0,
    [0,s,0],
    0
  );
}

Hack

$purple = function(
      dynamic $opt,
      dynamic $s,
      dynamic $r,
      dynamic $q,
      dynamic $s,
    ) use ($Pastel, $call12, $f) {
      if ($opt) {
        $sth = $opt[1];
        $underline = $sth;
      } else {
        $underline = 0;
      }
      if ($s) {
        $sth__0 = $s[1];
        $invert = $sth__0;
      } else {
        $invert = 0;
      }
      if ($r) {
        $sth__1 = $r[1];
        $dim = $sth__1;
      } else {
        $dim = 0;
      }
      if ($q) {
        $sth__2 = $q[1];
        $bold = $sth__2;
      } else {
        $bold = 0;
      }
      return $call12(
        $Pastel[36],
        0,
        Vector {0, $bold},
        Vector {0, $dim},
        0,
        Vector {0, $underline},
        Vector {0, $invert},
        0,
        0,
        $f,
        0,
        Vector {0, $s, 0},
        0,
      );
    };