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Test Info:

<!DOCTYPE HTML>
<!--
Any copyright is dedicated to the Public Domain.
-->
<html><head>
<title>Testcase for Bug 1633737</title>
<style>
html,body {
color:black; background-color:white; font:15px/1 monospace; padding:0; margin:0;
}
.grid {
display: grid;
width: min-content;
grid-auto-columns: 500px; /* should not be used */
border: 1px solid;
margin-bottom: 2px;
}
x { grid-column: 1 / foo; }
</style>
</head>
<body>
<script>
const MAX_LINE_NUMBER = 10000;
const sz = ["5px", "10px", "15px", "20px", "25px"];
const cols = [9997, 9998, 9999, 10000, 10001];
for (let len = 1; len <= sz.length; ++len) {
for (const c of cols) {
if (c + len + 1 < MAX_LINE_NUMBER) {
continue;
}
let grid = document.createElement("div");
grid.className = "grid";
let s = "repeat(" + c + ",0) " + "repeat(auto-fill,";
for (let i = 0; i < len; ++i) {
s += " " + sz[i];
}
s += ")";
grid.style.gridTemplateColumns = s;
console.log(s);
let item = document.createElement("x");
grid.appendChild(item);
document.body.appendChild(grid);
}
}
</script>
</body>
</html>