Add missing compile-time errors for async/await.

pkg/compiler/lib/src/diagnostics/messages.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.messages;
 
 import '../tokens/token.dart' show ErrorToken, Token;
 
 import 'invariant.dart' show invariant;
 import 'spannable.dart' show CURRENT_ELEMENT_SPANNABLE;
@@ skipping 168 matching lines @@
   INHERITED_IMPLICIT_GETTER,
   INHERITED_METHOD,
   INJECTED_PUBLIC_MEMBER,
   INIT_STATIC_FIELD,
   INITIALIZING_FORMAL_NOT_ALLOWED,
   INSTANCE_STATIC_SAME_NAME,
   INSTANCE_STATIC_SAME_NAME_CONT,
   INTERNAL_LIBRARY,
   INTERNAL_LIBRARY_FROM,
   INVALID_ARGUMENT_AFTER_NAMED,
+  INVALID_AWAIT,
   INVALID_AWAIT_FOR,
+  INVALID_AWAIT_FOR_IN,
   INVALID_BREAK,
   INVALID_CASE_DEFAULT,
   INVALID_CONSTRUCTOR_ARGUMENTS,
   INVALID_CONSTRUCTOR_NAME,
   INVALID_CONTINUE,
   INVALID_FOR_IN,
   INVALID_INITIALIZER,
   INVALID_METADATA,
   INVALID_METADATA_GENERIC,
   INVALID_OVERRIDDEN_FIELD,
@@ skipping 12 matching lines @@
   INVALID_PACKAGE_URI,
   INVALID_PARAMETER,
   INVALID_RECEIVER_IN_INITIALIZER,
   INVALID_SOURCE_FILE_LOCATION,
   INVALID_SYMBOL,
   INVALID_SYNC_MODIFIER,
   INVALID_TYPE_VARIABLE_BOUND,
   INVALID_UNNAMED_CONSTRUCTOR_NAME,
   INVALID_URI,
   INVALID_USE_OF_SUPER,
+  INVALID_YIELD,
   JS_INTEROP_CLASS_CANNOT_EXTEND_DART_CLASS,
   JS_INTEROP_CLASS_NON_EXTERNAL_MEMBER,
   JS_OBJECT_LITERAL_CONSTRUCTOR_WITH_POSITIONAL_ARGUMENTS,
   JS_INTEROP_METHOD_WITH_NAMED_ARGUMENTS,
   JS_PLACEHOLDER_CAPTURE,
   LIBRARY_NAME_MISMATCH,
   LIBRARY_NOT_FOUND,
   LIBRARY_NOT_SUPPORTED,
   LIBRARY_TAG_MUST_BE_FIRST,
   MAIN_NOT_A_FUNCTION,
@@ skipping 364 matching lines @@
   MessageKind.INHERITED_METHOD: "INHERITED_METHOD",
   MessageKind.INJECTED_PUBLIC_MEMBER: "INJECTED_PUBLIC_MEMBER",
   MessageKind.INIT_STATIC_FIELD: "INIT_STATIC_FIELD",
   MessageKind.INITIALIZING_FORMAL_NOT_ALLOWED:
       "INITIALIZING_FORMAL_NOT_ALLOWED",
   MessageKind.INSTANCE_STATIC_SAME_NAME: "INSTANCE_STATIC_SAME_NAME",
   MessageKind.INSTANCE_STATIC_SAME_NAME_CONT: "INSTANCE_STATIC_SAME_NAME_CONT",
   MessageKind.INTERNAL_LIBRARY: "INTERNAL_LIBRARY",
   MessageKind.INTERNAL_LIBRARY_FROM: "INTERNAL_LIBRARY_FROM",
   MessageKind.INVALID_ARGUMENT_AFTER_NAMED: "INVALID_ARGUMENT_AFTER_NAMED",
+  MessageKind.INVALID_AWAIT: "INVALID_AWAIT",
   MessageKind.INVALID_AWAIT_FOR: "INVALID_AWAIT_FOR",
+  MessageKind.INVALID_AWAIT_FOR_IN: "INVALID_AWAIT_FOR_IN",
   MessageKind.INVALID_BREAK: "INVALID_BREAK",
   MessageKind.INVALID_CASE_DEFAULT: "INVALID_CASE_DEFAULT",
   MessageKind.INVALID_CONSTRUCTOR_ARGUMENTS: "INVALID_CONSTRUCTOR_ARGUMENTS",
   MessageKind.INVALID_CONSTRUCTOR_NAME: "INVALID_CONSTRUCTOR_NAME",
   MessageKind.INVALID_CONTINUE: "INVALID_CONTINUE",
   MessageKind.INVALID_FOR_IN: "INVALID_FOR_IN",
   MessageKind.INVALID_INITIALIZER: "INVALID_INITIALIZER",
   MessageKind.INVALID_METADATA: "INVALID_METADATA",
   MessageKind.INVALID_METADATA_GENERIC: "INVALID_METADATA_GENERIC",
   MessageKind.INVALID_OVERRIDDEN_FIELD: "INVALID_OVERRIDDEN_FIELD",
@@ skipping 18 matching lines @@
   MessageKind.INVALID_RECEIVER_IN_INITIALIZER:
       "INVALID_RECEIVER_IN_INITIALIZER",
   MessageKind.INVALID_SOURCE_FILE_LOCATION: "INVALID_SOURCE_FILE_LOCATION",
   MessageKind.INVALID_SYMBOL: "INVALID_SYMBOL",
   MessageKind.INVALID_SYNC_MODIFIER: "INVALID_SYNC_MODIFIER",
   MessageKind.INVALID_TYPE_VARIABLE_BOUND: "INVALID_TYPE_VARIABLE_BOUND",
   MessageKind.INVALID_UNNAMED_CONSTRUCTOR_NAME:
       "INVALID_UNNAMED_CONSTRUCTOR_NAME",
   MessageKind.INVALID_URI: "INVALID_URI",
   MessageKind.INVALID_USE_OF_SUPER: "INVALID_USE_OF_SUPER",
+  MessageKind.INVALID_YIELD: "INVALID_YIELD",
   MessageKind.JS_INTEROP_CLASS_CANNOT_EXTEND_DART_CLASS:
       "JS_INTEROP_CLASS_CANNOT_EXTEND_DART_CLASS",
   MessageKind.JS_INTEROP_CLASS_NON_EXTERNAL_MEMBER:
       "JS_INTEROP_CLASS_NON_EXTERNAL_MEMBER",
   MessageKind.JS_OBJECT_LITERAL_CONSTRUCTOR_WITH_POSITIONAL_ARGUMENTS:
       "JS_OBJECT_LITERAL_CONSTRUCTOR_WITH_POSITIONAL_ARGUMENTS",
   MessageKind.JS_INTEROP_METHOD_WITH_NAMED_ARGUMENTS:
       "JS_INTEROP_METHOD_WITH_NAMED_ARGUMENTS",
   MessageKind.JS_PLACEHOLDER_CAPTURE: "JS_PLACEHOLDER_CAPTURE",
   MessageKind.LIBRARY_NAME_MISMATCH: "LIBRARY_NAME_MISMATCH",
@@ skipping 249 matching lines @@
   static String get MIRRORS_NOT_SUPPORTED_BY_BACKEND_PADDING =>
       dart2js_messages.MIRRORS_NOT_SUPPORTED_BY_BACKEND_PADDING;
 
   static String get DISALLOWED_LIBRARY_IMPORT_PADDING =>
       dart2js_messages.DISALLOWED_LIBRARY_IMPORT_PADDING;
 
   static Map<MessageKind, MessageTemplate> _constructMessageTemplates() {
     Map<MessageKind, MessageTemplate> result = <MessageKind, MessageTemplate>{};
     for (MessageKind kind in MessageKind.values) {
       String name = _KIND_TO_STRING_MAP[kind];
+      if (name == null) {
+        throw new ArgumentError("No mapping for $kind in _KIND_TO_STRING_MAP");
+      }
       Map data =
           shared_messages.MESSAGES[name] ?? dart2js_messages.MESSAGES[name];
       if (data == null) throw new ArgumentError.value(name);
 
       String id = data['id'];
       String template = data['template'];
       String howToFix = data['howToFix'];
       List examples = data['examples'];
       List<String> options = data['options'] ?? const <String>[];
       result[kind] =
@@ skipping 54 matching lines @@
   static String convertToString(value) {
     if (value is ErrorToken) {
       // Shouldn't happen.
       return value.assertionMessage;
     } else if (value is Token) {
       value = value.value;
     }
     return '$value';
   }
 }