Copy all fields of NullCheck

pkg/compiler/lib/src/cps_ir/inline.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library cps_ir.optimization.inline;
 
 import 'cps_fragment.dart';
 import 'cps_ir_builder.dart' show ThisParameterLocal;
 import 'cps_ir_nodes.dart';
 import 'optimizers.dart';
@@ skipping 452 matching lines @@
                                    invoke.sourceInformation));
       condition.type = typeSystem.boolType;
       Primitive check = _fragment.letPrim(
           new NullCheck.guarded(
               condition, dartReceiver, selector, invoke.sourceInformation));
       check.type = abstractReceiver.nonNullable();
       return check;
     }
 
     Primitive check = _fragment.letPrim(
-        new NullCheck(dartReceiver, invoke.sourceInformation));
+        new NullCheck(dartReceiver, invoke.sourceInformation,
+                      selector: selector));
     check.type = abstractReceiver.nonNullable();
     return check;
   }
 
 
   @override
   Primitive visitInvokeStatic(InvokeStatic node) {
     return tryInlining(node, node.target, null);
   }
 
@@ skipping 23 matching lines @@
       // We cannot inline a constructor invocation containing type arguments
       // because CreateInstance in the body does not know the type arguments.
       // We would incorrectly instantiate a class like A instead of A<B>.
       // TODO(kmillikin): try to fix this.
       GenericType generic = node.dartType;
       if (generic.typeArguments.any((DartType t) => !t.isDynamic)) return null;
     }
     return tryInlining(node, node.target, null);
   }
 }