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<!DOCTYPE html>
<html>
<style>
.grid {
display: grid;
grid-auto-flow: dense;
grid-auto-columns: min-content;
grid-template-rows: repeat(5, 50px);
}
</style>
<body>
<p>Ensure that dense-packing in grid-lanes properly handles "split" track openings.</p>
<div class="grid">
<div style="background: brown; width: 80px; grid-row: 5;"></div>
<div style="background: brown; width: 20px; grid-row: 3 / span 2"></div>
<div style="background: brown; width: 40px; grid-row: 2;"></div>
<div style="background: brown; width: 100px; grid-row: 1;"></div>
<div style="background: brown; width: 10px; grid-row: 1 / span 5;"></div>
<div style="background: pink; width: 10px; grid-row: 2 / span 4; transform: translateX(-30px);"></div>
<div style="background: lightgreen; width: 10px; grid-row: 3 / span 2; transform: translateX(-100px);"></div>
</div>
</body>
</html>