Issue 30034. Parse annotations for typedef(s) and resynthesize from Kernel in analyzer.

pkg/analyzer/lib/src/dart/element/element.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 analyzer.src.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 5009 matching lines @@
       _enclosingElement as CompilationUnitElementImpl;
 
   @override
   List<kernel.TypeParameter> get kernelTypeParams => _kernel?.typeParameters;
 
   @override
   ElementKind get kind => ElementKind.FUNCTION_TYPE_ALIAS;
 
   @override
   List<ElementAnnotation> get metadata {
+    if (_kernel != null) {
+      _metadata ??= enclosingUnit._kernelContext
+          .buildAnnotations(enclosingUnit, _kernel.annotations);
+    }
     if (_unlinkedTypedef != null) {
       return _metadata ??=
           _buildAnnotations(enclosingUnit, _unlinkedTypedef.annotations);
     }
     return super.metadata;
   }
 
   @override
   String get name {
     if (_kernel != null) {
@@ skipping 4701 matching lines @@
 
   @override
   DartObject computeConstantValue() => null;
 
   @override
   void visitChildren(ElementVisitor visitor) {
     super.visitChildren(visitor);
     _initializer?.accept(visitor);
   }
 }