Incorrect output from async-to-generator transform when nested async methods

[overlookmotel]

Input:

const outer = {
  value: 0,
  async method() {
    () => super.value;

    const inner = {
      value: 0,
      async method() {
        () => super.value;
      }
    };

    () => super.value;
  }
};

Desired output:

const outer = {
  value: 0,
  method() {
    var _superprop_getValue = () => super.value;

    return _asyncToGenerator(function* () {
      () => _superprop_getValue();

      const inner = {
        value: 0,
        method() {
          var _superprop_getValue2 = () => super.value;
          return _asyncToGenerator(function* () {
            () => _superprop_getValue2();
          })();
        }
      };

      () => _superprop_getValue();
    })();
  }
};

Actual output:

const outer = {
  value: 0,
  method() {
    var _superprop_getValue3 = () => super.value;

    return _asyncToGenerator(function* () {
      // OOPS! `_superprop_getValue` doesn't exist
      () => _superprop_getValue();

      const inner = {
        value: 0,
        method() {
          var _superprop_getValue2 = () => super.value;
          return _asyncToGenerator(function* () {
            () => _superprop_getValue2();
          })();
        }
      };

      () => _superprop_getValue3();
    })();
  }
};

I believe that when exiting a function which has super bindings, need to restore previous state of super_methods. It probably needs to be a stack.

Babel REPL

Failing test: #7314