1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testDirectProxyKeys8.js b/js/src/jit-test/tests/proxy/testDirectProxyKeys8.js
new file mode 100644
index 000000000..448691930
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyKeys8.js
@@ -0,0 +1,16 @@
+load(libdir + "asserts.js");
+
+/*
+ * Throw a TypeError if the trap skips an existing own enumerable property on a
+ * non-extensible object
+ */
+var target = {};
+Object.defineProperty(target, 'foo', {
+    enumerable: true,
+    configurable: true
+});
+Object.preventExtensions(target);
+
+var handler = { ownKeys: () => [] };
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy])
+    assertThrowsInstanceOf(() => Object.keys(p), TypeError);