Missing parenthesis in initializer of for loop

[nicolo-ribaudo]

Describe the bug

SWC is removing some parentheses form this for loop, and the resulting code logs 0 instead of 1

Input code

let count = 0;
for (var a = 1 || (2 in {}) in { x: 1 }) count++;
console.log(count);

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": true,
      "decorators": true
    },
    "loose": false,
    "minify": {
      "compress": false,
      "mangle": false
    },
    "target": "es2022"
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": false
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.6.7&code=H4sIAAAAAAAAA8tJLVFIzi%2FNK1GwVTCw5krLL1LQKEssUkgE8g0VamoUNIwUMvMUqms1wZRChRVQWAHIA2vS1rbmSs7PK87PSdXLyU%2FXAAtqWnMBADlkkHNWAAAA&config=H4sIAAAAAAAAA1WPMQ7DIAxF95wCee5QMXToHXoIRJyIKgFkO1KjKHcvJICSDf%2F3P9%2FeOqXgyxbeakvPNERDjNTmpPDqxfySArJGZEsuCjwqFc5IaMEm9WgDGQnEhRxgPzlMITAmMJiJSwZm592wXkttmCMh892YrcaPU8vffhZDI0peFFk%2FtYauMJhDvxyhcmQ%2B5PS9Lqa6RCsEx5%2BaPOv2P70hJh0xAQAA

SWC Info output

No response

Expected behavior

Same code

Actual behavior

let count = 0;
for(var a = 1 || 2 in {} in {
    x: 1
})count++;
console.log(count);

Version

1.6.7

Additional context

Babel has the same bug: babel/babel#16628

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.