1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/non262/regress/regress-601399.js b/js/src/tests/non262/regress/regress-601399.js
new file mode 100644
index 0000000000..7f727c697c
--- /dev/null
+++ b/js/src/tests/non262/regress/regress-601399.js
@@ -0,0 +1,25 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 4 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ *
+ * Test courtesy of Olov Lassus <olov.lassus@gmail.com>.
+ */
+
+function keys(o) {
+    var a = [];
+    for (var key in o) {
+        a.push(key);
+    }
+    return a;
+}
+
+var obj = {
+    'a': function() {}, 'b': function() {}, 'c': function() {}
+};
+var orig_order = keys(obj).toString();
+var tmp = obj["b"];
+var read_order = keys(obj).toString();
+
+reportCompare(orig_order, read_order,
+              "property enumeration order should not change after reading a method value");