Don't permit annotations inside variable declarations.

pkg/analyzer/test/generated/compile_time_error_code_test.dart

 // Copyright (c) 2014, 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 engine.compile_time_error_code_test;
 
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:unittest/unittest.dart' as _ut;
@@ skipping 558 matching lines @@
     Source source = addSource('''
 f() sync* {
   var await = 1;
 }
 ''');
     resolve(source);
     assertErrors(source, [ParserErrorCode.ASYNC_KEYWORD_USED_AS_IDENTIFIER]);
     verify([source]);
   }
 
+  void test_bug_23176() {
+    Source source = addSource('''
+class A {
+  const A([x]);
+}
+class B {
+  dynamic @A(const A()) x;
+}
+''');
+    resolve(source);
+    assertErrors(source, [
+      ParserErrorCode.EXPECTED_CLASS_MEMBER,
+      ParserErrorCode.MISSING_CONST_FINAL_VAR_OR_TYPE
+    ]);
+    verify([source]);
+  }
+
   void test_builtInIdentifierAsMixinName_classTypeAlias() {
     Source source = addSource(r'''
 class A {}
 class B {}
 class as = A with B;''');
     resolve(source);
     assertErrors(
         source, [CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME]);
     verify([source]);
   }
@@ skipping 5084 matching lines @@
         source, [CompileTimeErrorCode.WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR]);
     verify([source]);
     reset();
   }
 
   void _check_wrongNumberOfParametersForOperator1(String name) {
     _check_wrongNumberOfParametersForOperator(name, "");
     _check_wrongNumberOfParametersForOperator(name, "a, b");
   }
 }