Issue 25504. Fix for ignoring expression bodies in incremental resolver.

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/element/element.dart';
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 3929 matching lines @@
 ''');
     _updateAndValidate(
         r'''
 class A {
   final f = (() => 2)();
 }
 ''',
         expectedSuccess: false);
   }
 
+  void test_false_expressionBody2() {
+    _resolveUnit(r'''
+class A {
+  int m() => 10 * 10;
+}
+''');
+    _updateAndValidate(
+        r'''
+class A {
+  int m() => 10 * 100;
+}
+''',
+        expectedSuccess: false);
+  }
+
   void test_false_topLevelFunction_name() {
     _resolveUnit(r'''
 a() {}
 b() {}
 ''');
     _updateAndValidate(
         r'''
 a() {}
 bb() {}
 ''',
@@ skipping 1099 matching lines @@
   @override
   void logException(Object exception, [Object stackTrace]) {
     hasError = true;
   }
 
   @override
   logging.LoggingTimer startTimer() {
     return new logging.LoggingTimer(this);
   }
 }