1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testArgumentsPropLookup.js b/js/src/jit-test/tests/basic/testArgumentsPropLookup.js
new file mode 100644
index 0000000000..6e8a4cda75
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testArgumentsPropLookup.js
@@ -0,0 +1,19 @@
+(function() {
+    var s = "__proto__";
+    assertEq(arguments[s], Object.prototype);   
+})();
+
+Object.defineProperty(Object.prototype, "foo", {
+    get:function() {
+        this.bar = 42;
+        return 41
+    }
+});
+
+(function() {
+    var s = "foo";
+    assertEq(arguments[s], 41);
+    s = "bar";
+    assertEq(arguments[s], 42);
+    assertEq("bar" in Object.prototype, false);
+})();