1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/non262/ShadowRealms/function-copy-name-and-length-fails-error-realm.js b/js/src/tests/non262/ShadowRealms/function-copy-name-and-length-fails-error-realm.js
new file mode 100644
index 0000000000..23040c9fb3
--- /dev/null
+++ b/js/src/tests/non262/ShadowRealms/function-copy-name-and-length-fails-error-realm.js
@@ -0,0 +1,27 @@
+// |reftest| shell-option(--enable-shadow-realms) skip-if(!xulRuntime.shell)
+
+var sr = new ShadowRealm();
+
+var id = sr.evaluate(`x => x()`);
+
+// |id| is a Function from the current realm and _not_ from ShadowRealm.
+assertEq(id instanceof Function, true);
+
+function f() {
+  return 1;
+}
+
+// Smoke test: Ensure calling |f| through the ShadowRealm works correctly.
+assertEq(id(f), 1);
+
+// Add an accessor for "name" which throws. This will lead to throwing an
+// exception in CopyNameAndLength. The thrown exception should be from the
+// realm of |id|, i.e. the current realm.
+Object.defineProperty(f, "name", {
+  get() { throw new Error; }
+});
+
+assertThrowsInstanceOf(() => id(f), TypeError);
+
+if (typeof reportCompare === 'function')
+  reportCompare(true, true);