[generators] Desugar yield*.

src/messages.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 298 matching lines @@
   T(StrongDeleteProperty,                                                      \
     "Deleting property '%' of strong object '%' is deprecated")                \
   T(StrongExtendNull, "In strong mode, classes extending null are deprecated") \
   T(StrongImplicitConversion,                                                  \
     "In strong mode, implicit conversions are deprecated")                     \
   T(StrongRedefineDisallowed,                                                  \
     "On strong object %, redefining writable, non-configurable property '%' "  \
     "to be non-writable is deprecated")                                        \
   T(StrongSetProto,                                                            \
     "On strong object %, redefining the internal prototype is deprecated")     \
+  T(SymbolIteratorInvalid,                                                     \
+    "Result of the Symbol.iterator method is not an object")                   \
   T(SymbolKeyFor, "% is not a symbol")                                         \
   T(SymbolToNumber, "Cannot convert a Symbol value to a number")               \
   T(SymbolToString, "Cannot convert a Symbol value to a string")               \
   T(SimdToNumber, "Cannot convert a SIMD value to a number")                   \
+  T(ThrowMethodMissing, "The iterator does not provide a 'throw' method.")     \
   T(UndefinedOrNullToObject, "Cannot convert undefined or null to object")     \
   T(ValueAndAccessor,                                                          \
     "Invalid property descriptor. Cannot both specify accessors and a value "  \
     "or writable attribute, %")                                                \
   T(VarRedeclaration, "Identifier '%' has already been declared")              \
   T(WrongArgs, "%: Arguments list has wrong type")                             \
   /* ReferenceError */                                                         \
   T(NonMethod, "'super' is referenced from non-method")                        \
   T(NotDefined, "% is not defined")                                            \
   T(StrongSuperCallMissing,                                                    \
@@ skipping 224 matching lines @@
   static Handle<String> GetMessage(Isolate* isolate, Handle<Object> data);
   static base::SmartArrayPointer<char> GetLocalizedMessage(Isolate* isolate,
                                                            Handle<Object> data);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_