fix invocation completion with trailing stmt

pkg/analysis_server/test/services/completion/invocation_computer_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 test.services.completion.invocation;
 
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
@@ skipping 46 matching lines @@
           (CompletionSuggestion s) => s.completion == 'x').toList();
       if (shouldBeShadowed) {
         expect(suggestionsForX, hasLength(1));
         expect(suggestionsForX[0].declaringType, 'Derived');
       } else {
         expect(suggestionsForX, hasLength(2));
       }
     });
   }
 
+  fail_test_PrefixedIdentifier_trailingStmt_const_untyped() {
+    // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
+    addTestSource('const g = "hello"; f() {g.^ int y = 0;}');
+    computeFast();
+    return computeFull((bool result) {
+      assertSuggestInvocationGetter('length', 'int');
+    });
+  }
+
   @override
   void setUpComputer() {
     computer = new InvocationComputer();
   }
 
   test_generic_field() {
     addTestSource('''
 class C<T> {
   T t;
 }
@@ skipping 409 matching lines @@
 }
 void test(Derived d) {
   d.^
 }
 ''');
     return computeFull((bool result) {
       assertSuggestMethod('f', 'Base', 'void');
     });
   }
 }