Calling a private optional chained field fails with TypeError is not a function

[smvv]

Describe the bug

• I've read if you think transpilation is wrong.

When target is es2017 (< es2022), the optional chained private field in method search becomes undefined() causing this runtime error:

: _class_private_field_get1.call)(this)

TypeError: (intermediate value)(intermediate value)(intermediate value) is not a function

Input code

class Foo {
  #priv
  search() {
    this.#priv?.()
  }
}

console.log(new Foo().search())

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": false
    },
    "target": "es2017",
    "loose": false,
    "minify": {
      "compress": false,
      "mangle": false
    }
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": true
}

Playground link

https://play.swc.rs/?version=1.3.74&code=H4sIAAAAAAAAA0vOSSwuVnDLz1eo5lJQUC4oyiwD0sWpiUXJGRqaYEEFhZKMzGI9sJy9noYmUKiWq5aLKzk%2Frzg%2FJ1UvJz9dIy%2B1HGSIhqYeTKumAgCEDmZWWwAAAA%3D%3D&config=H4sIAAAAAAAAA1VPSQ7CMAy85xWRzxyAA0j8gUdEwa2Csil2JaKqfydpk0Jv9iye8SykhDdpeMi5jGWJKhGmfS8IZc%2FqUxDgHJF0MpHh1FmmSg3KEq7QsjHAKo3I1YV0PV%2FuzQE2BMLuaJgz3gz5P1MHFxMSHYVVqvxo8ZgoWiq48JpWsv1S%2B24NbvAT9bD9MBh6dienCcXyBZ3DefIXAQAA

SWC Info output

No response

Expected behavior

I would expect that the function is not invoked:

search() {
  var _class_private_field_get1;
  (_class_private_field_get1 = _class_private_field_get(this, _priv)) === null || _class_private_field_get1 === void 0 ? void 0 : _class_private_field_get1.call(this);
}

Related, tsc generates:

search() {
  var _a;
  (_a = __classPrivateFieldGet(this, _Foo_priv, "f")) === null || _a === void 0 ? void 0 : _a.call(this);
}

Actual behavior

The search method is transpiled as:

search() {
  var _class_private_field_get1;
  ((_class_private_field_get1 = _class_private_field_get(this, _priv)) === null || _class_private_field_get1 === void 0 ? void 0 : _class_private_field_get1.call)(this);
}

notice the _class_private_field_get1.call)(this).

Version

1.3.74

Additional context

Issue related to private optional chaining: #3610 (but that issue does not call the property's value)

[swc-bot]

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