1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/web-animations/interfaces/Animation/commitStyles-crash.html b/testing/web-platform/tests/web-animations/interfaces/Animation/commitStyles-crash.html
new file mode 100644
index 0000000000..063fe5a4eb
--- /dev/null
+++ b/testing/web-platform/tests/web-animations/interfaces/Animation/commitStyles-crash.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1741491">
+<script>
+  class CustomElement0 extends HTMLElement {
+    constructor () {
+      super()
+    }
+
+    static get observedAttributes () { return ["style"] }
+
+    async attributeChangedCallback () {
+      const animation = this.animate([{
+        "boxShadow": "none",
+        "visibility": "collapse"
+      }], 1957)
+      animation.commitStyles()
+    }
+  }
+
+  customElements.define("custom-element-0", CustomElement0)
+  window.addEventListener("load", () => {
+    const custom = document.createElement("custom-element-0")
+    document.documentElement.appendChild(custom)
+    custom.style.fontFamily = "family_name_0"
+  })
+</script>