es/minifier: Labelled loops in combination with continue can lead to name clash

[Ocean-OS]

Describe the bug

Using any code that uses a loop with a label, and a continue label statement may end up with name clashes:

outer: for (let i = 0; i < 100; i++) {
    for (let k = 0; k < 100; k++) {
        if (k === 10 && i === 10) continue outer;
    }
}

is compiled to

i:for(var i=0;i<100;i++){for(var r=0;r<100;r++){if(r===10&&i===10)continue i}}

which leads to a name conflict between the label i and the variable i.

Input code

outer: for (let i = 0; i < 100; i++) {
    for (let k = 0; k < 100; k++) {
        if (k === 10 && i === 10) continue outer;
    }
}

Config

{
  "jsc": {
    "parser": {
      "syntax": "ecmascript",
      "jsx": false
    },
    "target": "es5",
    "loose": false,
    "minify": {
      "compress": false,
      "mangle": {
        "toplevel": false,
        "keep_classnames": false,
        "keep_fnames": false,
        "keep_private_props": false,
        "ie8": false,
        "safari10": false
      }
    }
  },
  "module": {
    "type": "es6"
  },
  "minify": true,
  "isModule": true
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.10.7&code=H4sIAAAAAAAAA8svLUktslJIyy9S0MhJLVHIVLBVMLAGUjYKhgYghra2pkI1L5cCEMAVZUMUZcMUZSMpAoHMNAUNoBpbW6C0gpoayFAwW1MhOT%2BvJDOvNFUhH2SvNURLLS9XLQAlydKLiAAAAA%3D%3D&config=H4sIAAAAAAAAA32QQQ6CMBBF95yCzNqFLjTGO3gGM6kDKba06RQiIdzdFqiCEjdt5%2F83M%2BnvszyHigVc8j48Q2HRMbl3HRTuao%2FPoAAJjSyctB52ya04WgUqplEaJgc8upL82MXHGQdlDFPCZ03LWhbdcqEw2jpiXoMRxbpUtEDjHmMVtaS%2B4WA9iOxNKGSuUdPPuEQUf13rZIuewm3sFiTpvKEyFujkYb%2BKJoSTpXOMCbS5N4sPge8sTZGd4AOlgLxrxh0g%2BZoao5YNL76116fHAQAA

SWC Info output

No response

Expected behavior

I would've expected the code to work, and there wouldn't be any name conflicts between the label and any variables.

Actual behavior

The label, which has been renamed to i in the compilation, now clashes with the variable i.

Version

1.10.7

Additional context

No response

[Austaras]

It should be fine for label to share same name with variable.

[Ocean-OS]

It should be fine for label to share same name with variable.

When I try to run the code, it doesn't work.

[Austaras]

It should be fine for label to share same name with variable.

When I try to run the code, it doesn't work.

What's your js runtime? I've tried in Firefox and node.js. They both work fine.