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<!DOCTYPE html>
<html reftest-async-scroll
      reftest-displayport-x="0" reftest-displayport-y="0"
      reftest-displayport-w="800" reftest-displayport-h="2000"
      reftest-async-scroll-x="0" reftest-async-scroll-y="50">

<title>position:fixed should not be clipped by the subframe clip, but it should be clipped by the "clip" clip, and the "clip" clip should be moved by the subframe.</title>

<style>

body {
  margin: 0;
  height: 4000px;
}

.subframe {
  margin-top: 300px;
  width: 400px;
  height: 400px;
  overflow: auto;
}

.subframeScrolled {
  height: 800px;
  position: relative;
}

.absoluteClip {
  position: absolute;
  top: 0px;
  left: 100px;
  width: 200px;
  height: 200px;
  background: red;
  clip: rect(auto auto auto auto);
}

.fixed {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(lime, lime) black 0 100px no-repeat;
  background-size: 100% 200px;
}

</style>

<div class="subframe"
      reftest-displayport-x="0" reftest-displayport-y="0"
      reftest-displayport-w="400" reftest-displayport-h="800"
      reftest-async-scroll-x="0" reftest-async-scroll-y="150">
  <div class="subframeScrolled">
    <div class="absoluteClip">
      <div class="fixed"></div>
    </div>
  </div>
</div>