fix for 1.12.0-dev SDK and 0.25.1 analyzer breaking changes

test/checker/checker_test.dart

Index: test/checker/checker_test.dart
diff --git a/test/checker/checker_test.dart b/test/checker/checker_test.dart
index 374da04ad460449f4d2c715707193052f5d0027c..70dabc4120b752173aabc90051d68fe28490c60e 100644
--- a/test/checker/checker_test.dart
+++ b/test/checker/checker_test.dart
@@ -836,39 +836,41 @@ void main() {
     testChecker({
       '/main.dart': '''
 
-      class A {}
-      class B extends A {}
-
-      typedef T Function2<S, T>(S z);
-
-      void main() {
-        {
-          Function2<Function2<A, B>, Function2<B, A>> top;
-          Function2<Function2<B, A>, Function2<B, A>> right;
-          Function2<Function2<A, B>, Function2<A, B>> left;
-          Function2<Function2<B, A>, Function2<A, B>> bot;
-
-          top = right;
-          top = bot;
-          top = top;
-          top = left;
-
-          left = /*pass should be warning:DownCastComposite*/top;
-          left = left;
-          left = /*pass should be severe:StaticTypeError*/right;
-          left = bot;
-
-          right = /*pass should be warning:DownCastComposite*/top;
-          right = /*pass should be severe:StaticTypeError*/left;
-          right = right;
-          right = bot;
-
-          bot = /*pass should be warning:DownCastComposite*/top;
-          bot = /*pass should be warning:DownCastComposite*/left;
-          bot = /*pass should be warning:DownCastComposite*/right;
-          bot = bot;
-        }
+    class A {}
+    class B extends A {}
+
+    typedef T Function2<S, T>(S z);
+
+    void main() {
+      {
+        Function2<Function2<A, B>, Function2<B, A>> top;
+        Function2<Function2<B, A>, Function2<B, A>> right;
+        Function2<Function2<A, B>, Function2<A, B>> left;
+        Function2<Function2<B, A>, Function2<A, B>> bot;
+
+        top = right;
+        top = bot;
+        top = top;
+        top = left;
+
+        left = /*warning:DownCastComposite*/top;
+        left = left;
+        left =
+            /*warning:DownCastComposite should be severe:StaticTypeError*/right;
+        left = bot;
+
+        right = /*warning:DownCastComposite*/top;
+        right =
+            /*warning:DownCastComposite should be severe:StaticTypeError*/left;
+        right = right;
+        right = bot;
+
+        bot = /*warning:DownCastComposite*/top;
+        bot = /*warning:DownCastComposite*/left;
+        bot = /*warning:DownCastComposite*/right;
+        bot = bot;
       }
+    }
    '''
     });
   });