Block scoped const variables.

src/hydrogen.cc

 // 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 6035 matching lines @@
 
 
 void HGraphBuilder::VisitDeclaration(Declaration* decl) {
   HandleDeclaration(decl->proxy(), decl->mode(), decl->fun());
 }
 
 
 void HGraphBuilder::HandleDeclaration(VariableProxy* proxy,
                                       VariableMode mode,
                                       FunctionLiteral* function) {
-  if (mode == LET) return Bailout("unsupported let declaration");
+  if (mode == LET || mode == CONST_HARMONY) {
+    return Bailout("unsupported harmony declaration");
+  }
   Variable* var = proxy->var();
   switch (var->location()) {
     case Variable::UNALLOCATED:
       return Bailout("unsupported global declaration");
     case Variable::PARAMETER:
     case Variable::LOCAL:
     case Variable::CONTEXT:
       if (mode == CONST || function != NULL) {
         HValue* value = NULL;
         if (mode == CONST) {
@@ skipping 946 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal