Fix overly specific cast, prepare to release v1.2.4 (#621)

Author: kevmoo

source_gen/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.2.4
+
+* Fix overly-specific cast.
+
 ## 1.2.3
 
 * Require `analyzer: '>=4.6.0 <6.0.0'`

source_gen/lib/src/constants/reader.dart

@@ -271,7 +271,7 @@ class _DartObjectConstant extends ConstantReader {
   ConstantReader read(String field) {
     final reader = peek(field);
     if (reader == null) {
-      assertHasField(objectValue.type?.element2 as ClassElement, field);
+      assertHasField(objectValue.type!.element2 as InterfaceElement, field);
       return const _NullConstant();
     }
     return reader;

source_gen/pubspec.yaml

@@ -1,5 +1,5 @@
 name: source_gen
-version: 1.2.3
+version: 1.2.4
 description: >-
   Source code generation builders and utilities for the Dart build system
 repository: https://github.com/dart-lang/source_gen