Recursive function with no parameters generate while loop which contains assignment to undeclared _param variable

[hackwaly]

Thank you for filing! Check list:

• Is it a bug? Usage questions should often be asked in the forum instead.
• Concise, focused, friendly issue title & description.

Recursive function with no parameters generate while loop which contains assignment to undeclared _param variable

let test = () => {
  let rec loop = () => {
    switch () {
    | _ => loop()
    }
  }
  loop()
}

// Generated by ReScript, PLEASE EDIT WITH CARE


function test() {
  var loop = function () {
    while(true) {
      _param = undefined;
      continue ;
    };
  };
  return loop();
}

export {
  test ,
}
/* No side effect */

• A minimal, reproducible example.
• OS and browser versions, if relevant.
• Is it already fixed in master? Instructions

[hackwaly]

Any plan to fix this bug?

[philiparvidsson]

The biggest problem I see with this is that it will silently freeze instead of overflow the stack...