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+<!DOCTYPE html>
+<link rel="help" href="https://www.w3.org/TR/css-position-3/#abspos-breaking">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<!-- Fragmented OOF element with block-size percentage resolution. -->
+<style>
+ #multicol {
+ column-count: 3;
+ column-fill: auto;
+ column-gap: 0px;
+ /* last child is a spanner that takes up 33.33% so available height for
+ .rel and .abs is 100px */
+ height: 150px;
+ width: 150px;
+ margin-left: -50px;
+ }
+ .rel {
+ position: relative;
+ }
+ .abs {
+ position: absolute;
+ /* offset one full 100px column (accounted for by negative margin on #multicol */
+ top: 100px;
+ width: 50px;
+ height: 66.667%;
+ background: green;
+ }
+ .spanner {
+ column-span: all;
+ height: 33.33%;
+ }
+</style>
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div id="multicol">
+ <div class="rel">
+ <div class="abs"></div>
+ <div style="width: 10px; height: 300px;"></div>
+ </div>
+ <div class="spanner"></div>
+</div>