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+<!DOCTYPE html>
+<html lang="en">
+<meta charset="utf-8">
+<title>Moving a layer in a box with a rounded clip shouldn't invalidate.</title>
+
+<style>
+
+#outer {
+ position: absolute;
+ top: 50px;
+ left: 50px;
+ width: 300px;
+ height: 200px;
+ background-color: #DDD;
+ overflow: hidden;
+ border-radius: 10px;
+}
+
+#animatedLeft {
+ position: absolute;
+ top: 50px;
+ left: 40px;
+ box-model: border-box;
+ border: 1px solid lime;
+ width: 100px;
+ height: 100px;
+}
+
+</style>
+
+<body>
+
+<div id="outer">
+ <div id="animatedLeft" class="reftest-no-paint"></div>
+</div>
+
+<script>
+
+var animatedLeft = document.getElementById("animatedLeft");
+
+function doTest() {
+ animatedLeft.style.left = "100px";
+ document.documentElement.removeAttribute("class");
+}
+
+// Layerize #animatedLeft
+animatedLeft.offsetLeft;
+animatedLeft.style.left = "60px";
+animatedLeft.offsetLeft;
+animatedLeft.style.left = "40px";
+animatedLeft.offsetLeft;
+
+document.addEventListener("MozReftestInvalidate", doTest);
+
+</script>