1 files changed, 63 insertions, 3 deletions
diff --git a/deps/v8/test/mjsunit/regress/regress-5085.js b/deps/v8/test/mjsunit/regress/regress-5085.js
index 0ed034dc2d0..167bfa0f447 100644
--- a/deps/v8/test/mjsunit/regress/regress-5085.js
+++ b/deps/v8/test/mjsunit/regress/regress-5085.js
@@ -4,11 +4,71 @@
 
 // Flags: --allow-natives-syntax
 
+g = async function () {
+  await 10;
+}
+assertEquals(undefined, g.prototype)
+g();
+assertEquals(undefined, g.prototype)
+
+gen = function* () {
+  yield 10;
+}
+assertTrue(gen.prototype != undefined && gen.prototype != null)
+gen()
+assertTrue(gen.prototype != undefined && gen.prototype != null)
+
+async_gen = async function* () {
+  yield 10;
+}
+assertTrue(async_gen.prototype != undefined && async_gen.prototype != null)
+async_gen()
+assertTrue(async_gen.prototype != undefined && async_gen.prototype != null)
+
 function foo(x) {
   return x instanceof Proxy;
 }
 
-assertFalse(foo({}));
-assertFalse(foo({}));
+function test_for_exception() {
+  caught_exception = false;
+  try {
+    foo({});
+  } catch (e) {
+    caught_exception = true;
+    assertEquals(
+        'Function has non-object prototype \'undefined\' in instanceof check',
+        e.message);
+  } finally {
+    assertTrue(caught_exception)
+  }
+}
+
+test_for_exception();
+test_for_exception();
 %OptimizeFunctionOnNextCall(foo);
-assertFalse(foo({}));
+test_for_exception();
+
+Proxy.__proto__.prototype = Function.prototype;
+assertTrue((() => {}) instanceof Proxy);
+
+assertEquals(
+    new Proxy({}, {
+      get(o, s) {
+        return s
+      }
+    }).test,
+    'test');
+
+Proxy.__proto__ = {
+  prototype: {b: 2},
+  a: 1
+};
+assertEquals(Proxy.prototype, {b: 2});
+
+(function testProxyCreationContext() {
+  let realm = Realm.create();
+  let p1 = new Proxy({}, {});
+  let p2 = Realm.eval(realm, "new Proxy({}, {})");
+  assertEquals(0, Realm.owner(p1));
+  assertEquals(1, Realm.owner(p2));
+})();