TS namespace containing just declare class incorrectly removed

[nicolo-ribaudo]

Describe the bug

TS doesn't remove namespaces that contain declare class, while SWC does

Input code

namespace NS {
  declare class D {}
}

console.log(typeof NS)

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": false
    },
    "target": "es2019",
    "loose": false,
    "minify": {
      "compress": false,
      "mangle": false
    }
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": true
}

Playground link

https://play.swc.rs/?version=1.3.70&code=H4sIAAAAAAAAA8tLzE0tLkhMTlXwC1ao5lJQSElNzkksSlUAksXFCi4K1bVctVxcyfl5xfk5qXo5%2BekaJZUFqflpQPWaXADOIbDEPgAAAA%3D%3D&config=H4sIAAAAAAAAA1VPSQ7CMAy85xWRzxyAAxL8gUdEwa2Csil2JaKqfydpk0Jv9iye8SykhDdpeMi5jGWJKhGmfS8IZc%2FqUxDgHJF0MpHh1FmmSg3KEq7QsjHAKo3I1YV0PV%2FuzQE2BMLuaJgz3gz5P1MHFxMSHYVVqvxo8ZgoWiq48JpWsv1S%2B24NbvAT9bD9MBh6dienCcXyBaIK9Y0XAQAA

Expected behavior

var NS;
(function (NS) {
})(NS || (NS = {}));
console.log(typeof NS);

Actual behavior

console.log(typeof NS);

and at runtime it throws that NS is not declared

Version

1.3.70

Additional context

No response

[magic-akari]

duplicate #5197
will be fixed in #7202

[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.