<!DOCTYPE html>
<title>CSS Filters: Crash when a SVG filter is deleted</title>
<link rel="author" title="Stephen White" href="mailto:senorblanco@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#FilterElement">
<link rel="issue" href="https://bugs.webkit.org/show_bug.cgi?id=90405">
<meta name="assert" content="Check that crash doesn't happen when a SVG filter is deleted that used to be referenced by an HTML element but is no longer.">
<body>
  <img id="html" style="filter: url(