MirrorsUsed values are interpreted differently based on position, so they must be cached in differe…

dart/tests/compiler/dart2js/mirrors_used_test.dart

Index: dart/tests/compiler/dart2js/mirrors_used_test.dart
diff --git a/dart/tests/compiler/dart2js/mirrors_used_test.dart b/dart/tests/compiler/dart2js/mirrors_used_test.dart
index aa25c0da8c892d192038f5757a98be9611623185..1eb58921080df0bd55a5edd5dfaeb13f66121bdc 100644
--- a/dart/tests/compiler/dart2js/mirrors_used_test.dart
+++ b/dart/tests/compiler/dart2js/mirrors_used_test.dart
@@ -123,7 +123,9 @@ void main() {
 
 const MEMORY_SOURCE_FILES = const <String, String> {
   'main.dart': """
-@MirrorsUsed(targets: const [Foo], override: '*')
+// The repeated constant value for symbols and targets used to crash dart2js in
+// host-checked mode, and could potentially lead to other problems.
+@MirrorsUsed(symbols: 'Foo', targets: 'Foo', override: '*')
 import 'dart:mirrors';
 
 import 'library.dart';