Update confuse() on syncstar_less_than_test

tests/language/syncstar_less_than_test.dart

Index: tests/language/syncstar_less_than_test.dart
diff --git a/tests/language/syncstar_less_than_test.dart b/tests/language/syncstar_less_than_test.dart
index b0551a8750816f430f3ff26a963350b47f9b6b7a..db2f6f345984a9fc514d9b11a998f6501077b416 100644
--- a/tests/language/syncstar_less_than_test.dart
+++ b/tests/language/syncstar_less_than_test.dart
@@ -4,7 +4,8 @@
 
 import "package:expect/expect.dart";
 
-confuse(x) => [1, 'x', true, null, x].last;
+@NoInline() @AssumeDynamic()
+confuse(x) => x;
 
 Iterable<int> foo() sync* {
  var a = confuse(1);
@@ -15,4 +16,4 @@ Iterable<int> foo() sync* {
 
 main() {
   Expect.listEquals(foo().toList(), [2]);
-}
+}