[es6] Handle conflicts for sloppy let

test/mjsunit/harmony/block-conflicts-sloppy.js

Index: test/mjsunit/harmony/block-conflicts-sloppy.js
diff --git a/test/mjsunit/es6/block-conflicts.js b/test/mjsunit/harmony/block-conflicts-sloppy.js
similarity index 83%
copy from test/mjsunit/es6/block-conflicts.js
copy to test/mjsunit/harmony/block-conflicts-sloppy.js
index fdd581dd70b0e7b1d840054f527d6dcc940f24c7..25694edc5b0857f1a3b67ff0c6f4f99fe7e00915 100644
--- a/test/mjsunit/es6/block-conflicts.js
+++ b/test/mjsunit/harmony/block-conflicts-sloppy.js
@@ -4,7 +4,7 @@
 
 // Test for conflicting variable bindings.
 
-"use strict";
+// Flags: --no-legacy-const --harmony-sloppy
 
 function CheckException(e) {
   var string = e.toString();
@@ -44,8 +44,12 @@ function TestAll(expected,s,opt_e) {
   var e = "";
   var msg = s;
   if (opt_e) { e = opt_e; msg += opt_e; }
-  assertEquals(expected === 'LocalConflict' ? 'NoConflict' : expected,
-      TestGlobal(s,e), "global:'" + msg + "'");
+  // TODO(littledan): https://code.google.com/p/v8/issues/detail?id=4288
+  // It is also not clear whether these tests makes sense in sloppy mode.
+  // TODO(littledan): Add tests using Realm.eval to ensure that global eval
+  // works as expected.
+  // assertEquals(expected === 'LocalConflict' ? 'NoConflict' : expected,
+  //     TestGlobal(s,e), "global:'" + msg + "'");
   assertEquals(expected === 'LocalConflict' ? 'NoConflict' : expected,
       TestFunction(s,e), "function:'" + msg + "'");
   assertEquals(expected === 'LocalConflict' ? 'Conflict' : expected,
@@ -55,17 +59,22 @@ function TestAll(expected,s,opt_e) {
 
 function TestConflict(s) {
   TestAll('Conflict', s);
-  TestAll('Conflict', 'eval("' + s + '");');
+  // TODO(littledan): https://code.google.com/p/v8/issues/detail?id=4288
+  // It is also not clear whether these tests makes sense in sloppy mode.
+  // TestAll('Conflict', 'eval("' + s + '");');
 }
 
 function TestNoConflict(s) {
   TestAll('NoConflict', s, "'NoConflict'");
-  TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'");
+  // TODO(littledan): https://code.google.com/p/v8/issues/detail?id=4288
+  // TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'");
 }
 
 function TestLocalConflict(s) {
   TestAll('LocalConflict', s, "'NoConflict'");
-  TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'");
+  // TODO(littledan): https://code.google.com/p/v8/issues/detail?id=4288
+  // It is also not clear whether these tests makes sense in sloppy mode.
+  // TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'");
 }
 
 var letbinds = [ "let x;",