Allocate block-scoped global bindings to global context.

test/mjsunit/harmony/block-conflicts.js

 // Copyright 2011 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 17 matching lines @@
 // Flags: --harmony-scoping
 
 // Test for conflicting variable bindings.
 
 // TODO(ES6): properly activate extended mode
 "use strict";
 
 function CheckException(e) {
   var string = e.toString();
   assertTrue(string.indexOf("has already been declared") >= 0 ||
-             string.indexOf("redeclaration") >= 0);  return 'Conflict';
+             string.indexOf("redeclaration") >= 0);
+  return 'Conflict';
 }
 
 
 function TestFunction(s,e) {
   try {
     return eval("(function(){" + s + ";return " + e + "})")();
   } catch (x) {
     return CheckException(x);
   }
 }
@@ skipping 76 matching lines @@
 
 // Test conflicting catch/var bindings.
 for (var v = 0; v < varbinds.length; ++v) {
   TestConflict('try {} catch (x) { ' + varbinds[v] + '; }');
 }
 
 // Test conflicting parameter/var bindings.
 for (var v = 0; v < varbinds.length; ++v) {
   TestNoConflict('(function (x) { ' + varbinds[v] + '; })()');
 }