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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!--
+     Testcase with absolutely positioned children of a flex container.
+     This positioning is with respect to the containing block's left edge.
+-->
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <style>
+      div.containingBlock {
+        top: 15px;
+        left: 20px;
+        height: 400px;
+        position: absolute;
+        border: 2px dashed purple;
+      }
+      .abspos {
+        position: absolute;
+        left: 5px;
+        border: 2px dotted black;
+      }
+      div.flexbox {
+        width: 200px;
+        height: 100px;
+        display: flex;
+      }
+      div.a {
+        flex: 1 0 auto;
+        width: 30px;
+        height: 100px;
+        background: lightgreen;
+      }
+      div.b {
+        flex: 2 0 auto;
+        width: 20px;
+        height: 100px;
+        background: yellow;
+      }
+      div.inflex {
+        flex: none;
+        width: 20px;
+        height: 100px;
+        background: gray;
+      }
+      div.noFlexFn {
+        width: 15px;
+        height: 15px;
+        background: teal;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="containingBlock">
+      <!-- First child abspos: -->
+      <div class="flexbox"><div class="a abspos"/><div class="b"/></div>
+      <!-- Second child abspos: -->
+      <div class="flexbox"><div class="a"/><div class="b abspos"/></div>
+      <!-- Middle child abspos: -->
+      <div class="flexbox"
+           ><div class="a"/><div class="inflex abspos"/><div class="b"/></div>
+      <!-- Third child abspos, w/ inflexible items & justify-content: space-around: -->
+      <div class="flexbox" style="justify-content: space-around"
+           ><div class="inflex"/><div class="inflex"/><div class="inflex"
+          /><div class="noFlexFn abspos"/><div class="inflex"/></div>
+    </div>
+  </body>
+</html>