Fix issue with setting __proto__ on a value

test/mjsunit/proto-accessor.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 80 matching lines @@
   assertThrows(function() { getProto.call(null); }, TypeError);
   assertThrows(function() { getProto.call(undefined); }, TypeError);
 }
 TestGetProtoOfValues();
 
 
 var values = [1, true, false, 's', Symbol()];
 
 
 function TestSetProtoOfValues() {
+  var proto = {};
   for (var i = 0; i < values.length; i++) {
-    assertEquals(setProto.call(values[i], i), undefined);
+    assertEquals(setProto.call(values[i], proto), undefined);
   }
 
-  assertThrows(function() { setProto.call(null, 7); }, TypeError);
-  assertThrows(function() { setProto.call(undefined, 8); }, TypeError);
+  assertThrows(function() { setProto.call(null, proto); }, TypeError);
+  assertThrows(function() { setProto.call(undefined, proto); }, TypeError);
 }
 TestSetProtoOfValues();
 
 
 function TestSetProtoToValue() {
   var object = {};
   var proto = {};
   setProto.call(object, proto);
 
   var valuesWithUndefined = values.concat(undefined);
@@ skipping 16 matching lines @@
   var p = {};
   o.__proto__ = p;
   assertEquals(Object.getPrototypeOf(o), Object.prototype);
   var desc4 = Object.getOwnPropertyDescriptor(o, "__proto__");
   assertTrue(desc4.configurable);
   assertTrue(desc4.enumerable);
   assertTrue(desc4.writable);
   assertEquals(desc4.value, p);
 }
 TestDeleteProto();