Safari - SyntaxError: cannot declare let variable twice

Question

This is a mistake that I have never seen before.

Here's a simple replay: https://jsfiddle.net/jakelauer/qr0ysmst/3/

const x = myVar => {

  console.log(myVar);

  for(let myVar of [1,2,3]){
    console.log(myVar);
  }

};

x(10);

Exit to the Chrome: 10, 1, 2, 3
output in Safari:SyntaxError: Cannot declare a let variable twice: 'myVar'.

Ideas? Is this a bug in Safari?

Edit - It is worth noting that I will never do this on purpose. I noticed this because I use the ASP.NET build and minimize system, and this system did it (so my site crashed on Safari)

Edit 2 - Interestingly, this works in both browsers

let x = 10;

for(let x of [1,2,3])
{
    console.log(x);
}

https://jsfiddle.net/jakelauer/aw37pd2s/1/

Answer 1

Safari. .