Don't serialize Label in NamedExpression as a label declaration.

pkg/analyzer/test/src/summary/summary_common.dart

 // Copyright (c) 2015, 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.test.src.summary.summary_common;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/scanner/reader.dart';
@@ skipping 4655 matching lines @@
     }
   }
 
   test_executable_localLabels_inTopLevelFunction() {
     String code = r'''
 f() {
   aaa: while (true) {}
   bbb: switch (42) {
     ccc: case 0:
       break;
+    ddd: default:
+      break;
   }
 }
 ''';
     UnlinkedExecutable executable = serializeExecutableText(code);
     List<UnlinkedLabel> labels = executable.localLabels;
-    expect(labels, hasLength(3));
+    expect(labels, hasLength(4));
     {
       UnlinkedLabel aaa = labels.singleWhere((l) => l.name == 'aaa');
       expect(aaa, isNotNull);
       expect(aaa.isOnSwitchMember, isFalse);
       expect(aaa.isOnSwitchStatement, isFalse);
     }
     {
       UnlinkedLabel bbb = labels.singleWhere((l) => l.name == 'bbb');
       expect(bbb, isNotNull);
       expect(bbb.isOnSwitchMember, isFalse);
       expect(bbb.isOnSwitchStatement, isTrue);
     }
     {
       UnlinkedLabel ccc = labels.singleWhere((l) => l.name == 'ccc');
       expect(ccc, isNotNull);
       expect(ccc.isOnSwitchMember, isTrue);
       expect(ccc.isOnSwitchStatement, isFalse);
     }
+    {
+      UnlinkedLabel ccc = labels.singleWhere((l) => l.name == 'ddd');
+      expect(ccc, isNotNull);
+      expect(ccc.isOnSwitchMember, isTrue);
+      expect(ccc.isOnSwitchStatement, isFalse);
+    }
   }
 
   test_executable_localLabels_inTopLevelGetter() {
     String code = r'''
 get g {
   aaa: while (true) {}
   bbb: while (true) {}
 }
 ''';
     UnlinkedExecutable executable =
         serializeExecutableText(code, executableName: 'g');
     List<UnlinkedLabel> labels = executable.localLabels;
     expect(labels, hasLength(2));
     {
       UnlinkedLabel aaa = labels.singleWhere((l) => l.name == 'aaa');
       expect(aaa, isNotNull);
       expect(aaa.isOnSwitchMember, isFalse);
       expect(aaa.isOnSwitchStatement, isFalse);
     }
     {
       UnlinkedLabel bbb = labels.singleWhere((l) => l.name == 'bbb');
       expect(bbb, isNotNull);
       expect(bbb.isOnSwitchMember, isFalse);
       expect(bbb.isOnSwitchStatement, isFalse);
     }
   }
 
+  test_executable_localLabels_namedExpressionLabel() {
+    String code = r'''
+f() {
+  foo(p: 42);
+}
+foo({int p}) {}
+''';
+    UnlinkedExecutable executable = serializeExecutableText(code);
+    List<UnlinkedLabel> labels = executable.localLabels;
+    expect(labels, isEmpty);
+  }
+
   test_executable_localVariables_catch() {
     String code = r'''
 f() { // 1
   try {
     throw 42;
   } on int catch (e, st) { // 2
     print(e);
     print(st);
   } // 3
 } // 4
@@ skipping 3366 matching lines @@
 class _PrefixExpectation {
   final ReferenceKind kind;
   final String name;
   final String absoluteUri;
   final String relativeUri;
   final int numTypeParameters;
 
   _PrefixExpectation(this.kind, this.name,
       {this.absoluteUri, this.relativeUri, this.numTypeParameters: 0});
 }