Resolve issue with latest analyzer, enums and annotations

Fixes #1083

Author: kevmoo

json_serializable/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 6.1.4
+
+- Fix issues with latest `package:analyzer` related to enums and annotations.
+
 ## 6.1.3
 
 - Allow latest `package:analyzer`.

json_serializable/lib/src/utils.dart

@@ -45,7 +45,7 @@ T enumValueForDartObject<T>(
   List<T> items,
   String Function(T) name,
 ) =>
-    items.singleWhere((v) => source.getField(name(v)) != null);
+    items[source.getField('index')!.toIntValue()!];
 
 /// Return an instance of [JsonSerializable] corresponding to a the provided
 /// [reader].

json_serializable/pubspec.yaml

@@ -1,5 +1,5 @@
 name: json_serializable
-version: 6.1.3
+version: 6.1.4
 description: >-
   Automatically generate code for converting to and from JSON by annotating
   Dart classes.