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diff --git a/layout/generic/crashtests/1633737-4.html b/layout/generic/crashtests/1633737-4.html
new file mode 100644
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+++ b/layout/generic/crashtests/1633737-4.html
@@ -0,0 +1,53 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<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>