Typecheck constructor initializers properly

test/dart_codegen/expect/core/string.dart

Index: test/dart_codegen/expect/core/string.dart
diff --git a/test/dart_codegen/expect/core/string.dart b/test/dart_codegen/expect/core/string.dart
index eb769a7fccaa73f6e05645d6d6b2707f813a3361..6de766102a9e3ad9dd03e460414a1361d10a069a 100644
--- a/test/dart_codegen/expect/core/string.dart
+++ b/test/dart_codegen/expect/core/string.dart
@@ -73,7 +73,7 @@ if (index > 0 && index < string.length && _isLeadSurrogate(string.codeUnitAt(ind
 throw new ArgumentError('Index inside surrogate pair: $index');
 }
 }
- int get rawIndex => ((__x9) => DDC$RT.cast(__x9, dynamic, int, "CastGeneral", """line 665, column 24 of dart:core/string.dart: """, __x9 is int, true))((_position != _nextPosition) ? _position : null);
+ int get rawIndex => ((__x13) => DDC$RT.cast(__x13, dynamic, int, "CastGeneral", """line 665, column 24 of dart:core/string.dart: """, __x13 is int, true))((_position != _nextPosition) ? _position : null);
  void set rawIndex(int rawIndex) {
 RangeError.checkValidIndex(rawIndex, string, "rawIndex");
  reset(rawIndex);