diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-551763-0.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-551763-0.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+(function() {
+    var o = {'arguments': 42};
+    with (o) { // Definitely forces heavyweight.
+        // Note syntax is not a property access.
+        reportCompare(delete arguments, true,
+                      "arguments property deletion within with block");
+    }
+    reportCompare('arguments' in o, false,
+                  "property deletion observable");
+})();
+
+(function() {
+    var o = {'arguments': 42};
+    delete o.arguments;
+    reportCompare('arguments' in o, false,
+                  "arguments property deletion with property access syntax");
+})();
+
+(function() {
+    var arguments = 42; // Forces heavyweight.
+    reportCompare(delete arguments, false,
+                  "arguments variable");
+})();
+
+(function() {
+    reportCompare(delete arguments, false, "arguments object");
+})();