Issue 27689. Fix incremental resolution with body modifiers changes.

pkg/analyzer/test/generated/incremental_resolver_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 analyzer.test.generated.incremental_resolver_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
@@ skipping 993 matching lines @@
 ''');
     _updateAndValidate(
         r'''
 class A {
   int m() => 10 * 100;
 }
 ''',
         expectedSuccess: false);
   }
 
+  void test_false_inBody_addAsync() {
+    _resolveUnit(r'''
+class C {
+  test() {}
+}
+''');
+    _updateAndValidate(
+        r'''
+class C {
+  test() async {}
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_inBody_async_addStar() {
+    _resolveUnit(r'''
+import 'dart:async';
+class C {
+  Stream test() async {}
+}
+''');
+    _updateAndValidate(
+        r'''
+import 'dart:async';
+class C {
+  Stream test() async* {}
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_inBody_async_removeStar() {
+    _resolveUnit(r'''
+import 'dart:async';
+class C {
+  Stream test() async* {}
+}
+''');
+    _updateAndValidate(
+        r'''
+import 'dart:async';
+class C {
+  Stream test() async {}
+}
+''',
+        expectedSuccess: false);
+  }
+
   void test_false_inBody_functionExpression() {
     _resolveUnit(r'''
 class C extends D {
   static final f = () {
     var x = 0;
   }();
 }
 
 class D {}
 ''');
     _updateAndValidate(
         r'''
 class C extends D {
   static final f = () {
     var x = 01;
   }();
 }
 
 class D {}
 ''',
         expectedSuccess: false);
   }
 
+  void test_false_inBody_removeAsync() {
+    _resolveUnit(r'''
+class C {
+  test() async {}
+}
+''');
+    _updateAndValidate(
+        r'''
+class C {
+  test() {}
+}
+''',
+        expectedSuccess: false);
+  }
+
+  void test_false_inBody_sync_addStar() {
+    _resolveUnit(r'''
+class C {
+  test() {}
+}
+''');
+    _updateAndValidate(
+        r'''
+class C {
+  test() sync* {}
+}
+''',
+        expectedSuccess: false);
+  }
+
   void test_false_topLevelFunction_name() {
     _resolveUnit(r'''
 a() {}
 b() {}
 ''');
     _updateAndValidate(
         r'''
 a() {}
 bb() {}
 ''',
@@ skipping 1295 matching lines @@
   void logException(Object exception, [Object stackTrace]) {
     lastException = exception;
     lastStackTrace = stackTrace;
   }
 
   @override
   logging.LoggingTimer startTimer() {
     return new logging.LoggingTimer(this);
   }
 }