1 files changed, 23 insertions, 0 deletions
diff --git a/dom/animation/test/crashtests/1656419.html b/dom/animation/test/crashtests/1656419.html
new file mode 100644
index 0000000000..4e76cb0a55
--- /dev/null
+++ b/dom/animation/test/crashtests/1656419.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<style>
+#target {
+  width: 200vw;
+  height: 200vh;
+}
+</style>
+<div id="target"></div>
+<script>
+const animA = target.animate(
+  { transform: 'translateX(100px)' },
+  { duration: 50 }
+);
+const animB = target.animate(
+  { transform: 'translateX(100px)', composite: 'add' },
+  { duration: 100 }
+);
+animB.finished.then(() => {
+  document.documentElement.classList.remove("reftest-wait");
+});
+</script>
+</html>