arguments object, non-strict immutable name binding fixup (#1278)

test/language/arguments-object/S10.1.6_A1_T3.js

@@ -1,20 +0,0 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: >
-    The activation object is initialised with a property with name arguments
-    and attributes {DontDelete}
-es5id: 10.1.6_A1_T3
-description: Checking function which returns "this"
-flags: [noStrict]
----*/
-
-function f1() {
-  if (delete arguments) {
-    $ERROR("#1: Function parameters have attribute {DontDelete}" + arguments);
-  }
-  return arguments;
-}
-
-f1();

test/language/arguments-object/non-strict-arguments-object-is-immutable.js

@@ -0,0 +1,21 @@
+// Copyright 2017 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-functiondeclarationinstantiation
+description: Non-strict mode function execution context has a mutable "arguments" binding, however it is created with a "false" argument, which means it may not be deleted.
+info: |
+  envRec.CreateMutableBinding("arguments", false).
+
+  CreateMutableBinding(N, D)
+
+  Create a new but uninitialized mutable binding in an Environment Record. The String value N is the text of the bound name. If the Boolean argument D is true the binding may be subsequently deleted.
+
+flags: [noStrict]
+---*/
+
+function f1() {
+  assert.sameValue(delete arguments, false);
+}
+
+f1();