1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/js1_8_5/regress/regress-551763-0.js b/js/src/tests/js1_8_5/regress/regress-551763-0.js
new file mode 100644
index 000000000..6aeceac23
--- /dev/null
+++ b/js/src/tests/js1_8_5/regress/regress-551763-0.js
@@ -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");
+})();