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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - IntersectionObserver leaks documents"
   href="https://bugs.webkit.org/show_bug.cgi?id=189128">189128</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>IntersectionObserver leaks documents
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebCore Misc.
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>simon.fraser@apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Testing with changes from <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Have WebKitTestRunner check for abandoned documents"
   href="show_bug.cgi?id=186214">bug 186214</a>, I see that the following IntersectionObserver tests leak their documents:

imported/w3c/web-platform-tests/intersection-observer/client-rect.html
imported/w3c/web-platform-tests/intersection-observer/cross-origin-iframe.html
imported/w3c/web-platform-tests/intersection-observer/disconnect.html
imported/w3c/web-platform-tests/intersection-observer/isIntersecting-change-events.html
imported/w3c/web-platform-tests/intersection-observer/observer-attributes.html
imported/w3c/web-platform-tests/intersection-observer/shadow-content.html
imported/w3c/web-platform-tests/intersection-observer/text-target.html
imported/w3c/web-platform-tests/intersection-observer/timestamp.html
imported/w3c/web-platform-tests/intersection-observer/unclipped-root.html
imported/w3c/web-platform-tests/intersection-observer/zero-area-element-hidden.html
imported/w3c/web-platform-tests/intersection-observer/zero-area-element-visible.html

In manual testing, I see that the IntersectionObserver never goes away, which retains the callback, which retains the Document.</pre>
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      </p>


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