Add tests for initializer list execution in object initialization

pkg/kernel/lib/interpreter/interpreter.dart

Index: pkg/kernel/lib/interpreter/interpreter.dart
diff --git a/pkg/kernel/lib/interpreter/interpreter.dart b/pkg/kernel/lib/interpreter/interpreter.dart
index 9723700f41409b250ec643c3fc9658d795711a4d..bb40ab71fa65be0db3766d279d7d50c9a8f96e80 100644
--- a/pkg/kernel/lib/interpreter/interpreter.dart
+++ b/pkg/kernel/lib/interpreter/interpreter.dart
@@ -666,7 +666,7 @@ class InitializerContinuation extends ExpressionContinuation {
     }
 
     var cont = new InitializerContinuation(newObject, currentClass,
-        initializerEnvironment, initializers.skip(1), continuation);
+        initializerEnvironment, initializers.skip(1).toList(), continuation);
     return new ExpressionConfiguration(
         _getExpression(next), initializerEnvironment, cont);
   }