1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testPropCache.cpp b/js/src/jsapi-tests/testPropCache.cpp
new file mode 100644
index 0000000000..6b501a65a1
--- /dev/null
+++ b/js/src/jsapi-tests/testPropCache.cpp
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jsapi-tests/tests.h"
+
+static int g_counter;
+
+static bool CounterAdd(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+                       JS::HandleValue v) {
+  g_counter++;
+  return true;
+}
+
+static const JSClassOps CounterClassOps = {
+    CounterAdd,  // addProperty
+    nullptr,     // delProperty
+    nullptr,     // enumerate
+    nullptr,     // newEnumerate
+    nullptr,     // resolve
+    nullptr,     // mayResolve
+    nullptr,     // finalize
+    nullptr,     // call
+    nullptr,     // hasInstance
+    nullptr,     // construct
+    nullptr,     // trace
+};
+
+static const JSClass CounterClass = {"Counter", /* name */
+                                     0,         /* flags */
+                                     &CounterClassOps};
+
+BEGIN_TEST(testPropCache_bug505798) {
+  g_counter = 0;
+  EXEC("var x = {};");
+  CHECK(JS_DefineObject(cx, global, "y", &CounterClass, JSPROP_ENUMERATE));
+  EXEC(
+      "var arr = [x, y];\n"
+      "for (var i = 0; i < arr.length; i++)\n"
+      "    arr[i].p = 1;\n");
+  CHECK_EQUAL(g_counter, 1);
+  return true;
+}
+END_TEST(testPropCache_bug505798)