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      <base href="https://bugs.webkit.org/" />
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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 - Crash in WebCore::SVGRenderSupport::updateMaskedAncestorShouldIsolateBlending"
   href="https://bugs.webkit.org/show_bug.cgi?id=164774">164774</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Crash in WebCore::SVGRenderSupport::updateMaskedAncestorShouldIsolateBlending
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>Safari Technology Preview
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>URL</th>
          <td>https://www.theguardian.com/world/2016/nov/15/japan-fixes-vast-fukuoka-city-sinkhole-repaired-two-days
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>macOS 10.12
          </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&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>dieter&#64;komendera.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=294836" name="attach_294836" title="crash log">attachment 294836</a> <a href="attachment.cgi?id=294836&amp;action=edit" title="crash log">[details]</a></span>
crash log

I can reliably reproduce the crash with these steps:

1) Go go <a href="https://www.theguardian.com/world/2016/nov/15/japan-fixes-vast-fukuoka-city-sinkhole-repaired-two-days">https://www.theguardian.com/world/2016/nov/15/japan-fixes-vast-fukuoka-city-sinkhole-repaired-two-days</a>
2) Scroll down towards the &quot;related content&quot; section

macOS 10.12.1 (16B2555)
Release 17 (Safari 10.1, WebKit 12603.1.11.1)

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                 0x000000010cb8844b WebCore::SVGRenderSupport::updateMaskedAncestorShouldIsolateBlending(WebCore::RenderElement const&amp;) + 123
1   com.apple.WebCore                 0x000000010cadcdda WebCore::RenderElement::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 122
2   com.apple.WebCore                 0x000000010be22e1d WebCore::RenderSVGModelObject::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) + 77
3   com.apple.WebCore                 0x000000010cbc74fa WebCore::RenderTreeUpdater::createRenderer(WebCore::Element&amp;, WebCore::RenderStyle&amp;&amp;) + 778
4   com.apple.WebCore                 0x000000010cbc652d WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&amp;, WebCore::Style::ElementUpdate&amp;) + 349
5   com.apple.WebCore                 0x000000010cbc5700 WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&amp;) + 592
6   com.apple.WebCore                 0x000000010cbc543b WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr&lt;WebCore::Style::Update, std::__1::default_delete&lt;WebCore::Style::Update&gt; &gt;) + 411
7   com.apple.WebCore                 0x000000010c193a8e WebCore::Document::recalcStyle(WebCore::Style::Change) + 766
8   com.apple.WebCore                 0x000000010bd824d6 WebCore::Document::updateLayout() + 134</pre>
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      </p>
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