Change error handling.

test/kernel/regression/unresolved_constructor.dart

Index: test/kernel/regression/unresolved_constructor.dart
diff --git a/test/kernel/regression/issue_000008.dart b/test/kernel/regression/unresolved_constructor.dart
similarity index 79%
copy from test/kernel/regression/issue_000008.dart
copy to test/kernel/regression/unresolved_constructor.dart
index b9f1f6e480aefc2eb0cbaf399221abf9426bcb71..3106df6a03ab388be221dd2821af805ef297a57a 100644
--- a/test/kernel/regression/issue_000008.dart
+++ b/test/kernel/regression/unresolved_constructor.dart
@@ -2,11 +2,11 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
-class C {
-  final x;
-  C(this.x);
+class Foo {
+  Foo(x, y);
 }
 
 main() {
-  new C(42);
+  new Foo();
+  new Foo.notHere();
 }