Regression in adjacent-descendant selector traversal

[koal44]

Here's a minimal repro

import { JSDOM } from 'jsdom';

describe('nwsapi', () => {
  it('should find the target', () => {
    const doc = new JSDOM(`
      <div>
        <div class="neighbor"></div>
        <div>
          <a>
            <img class="target"></img>
          </a>
        </div>
      </div>
    `).window.document;

    const plusDiv = doc.querySelector('.neighbor + div .target');
    const plusStar = doc.querySelector('.neighbor + * .target');

    assert.ok(plusDiv, '+ div should match');
    assert.ok(plusStar, '+ * should also match'); // fails
  });
});

I traced the regression to 3d8f8d2 and more specifically to this area of the code:

  case '~':
    source = 'var N' + k + '=e;while(e&&(e=e.previousElementSibling)){' + source + '}e=N' + k + ';';
  case '+':
    source = 'var N' + k + '=e;if(e&&(e=e.previousElementSibling)){' + source + '}e=N' + k + ';';
  case '\x20':
    source = 'var N' + k + '=e;while(e&&(e=e.parentElement)){' + source + '}e=N' + k + ';';

In the commit, the restoration of e after branch traversal was dropped.