Fix for indexing synthetic enum fields.

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

Index: pkg/analyzer/test/src/summary/index_unit_test.dart
diff --git a/pkg/analyzer/test/src/summary/index_unit_test.dart b/pkg/analyzer/test/src/summary/index_unit_test.dart
index 90547ec654a056b7701bb658b0a10b4b77dc783d..2da6b61bdb401bf423408fa08ced90155606f7f7 100644
--- a/pkg/analyzer/test/src/summary/index_unit_test.dart
+++ b/pkg/analyzer/test/src/summary/index_unit_test.dart
@@ -735,6 +735,27 @@ class A {
     }
   }
 
+  void test_isReferencedBy_FieldElement_ofEnum() {
+    verifyNoTestUnitErrors = false;
+    _indexTestUnit('''
+enum MyEnum {
+  A, B, C
+}
+main() {
+  print(MyEnum.values);
+  print(MyEnum.A.index);
+  print(MyEnum.A);
+  print(MyEnum.B);
+}
+''');
+    ClassElement enumElement = findElement('MyEnum');
+    assertThat(enumElement.getGetter('values'))
+      ..isReferencedAt('values);', true);
+    assertThat(enumElement.getGetter('index'))..isReferencedAt('index);', true);
+    assertThat(enumElement.getGetter('A'))..isReferencedAt('A);', true);
+    assertThat(enumElement.getGetter('B'))..isReferencedAt('B);', true);
+  }
+
   void test_isReferencedBy_FunctionElement() {
     _indexTestUnit('''
 foo() {}