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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 - Whitespace underlines are not repainted on color changes"
   href="https://bugs.webkit.org/show_bug.cgi?id=149086">149086</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Whitespace underlines are not repainted on color changes
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </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>CSS
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>pdr&#64;google.com
          </td>
        </tr></table>
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        <pre>Created <span class=""><a href="attachment.cgi?id=261042" name="attach_261042" title="Repro for webkit">attachment 261042</a> <a href="attachment.cgi?id=261042&amp;action=edit" title="Repro for webkit">[details]</a></span>
Repro for webkit

wkrev.com/150259 introduced a small regression where text decorations such as underlines are not repainted for whitespace text.

A user recently reported this against Chrome and I had merged the above patch a few years ago so we shared this bug. I fixed this by removing the whitespace check which keeps the original optimization but causes whitespace runs to be repainted. My fix landed in <a href="https://src.chromium.org/viewvc/blink?revision=202164&amp;view=revision">https://src.chromium.org/viewvc/blink?revision=202164&amp;view=revision</a> and a similar fix would work in WebKit too.</pre>
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