Fis crash https://code.google.com/p/dart/issues/detail?id=14242, by calling resolveArguments on the…

sdk/lib/_internal/compiler/implementation/inferrer/inferrer_visitor.dart

 // Copyright (c) 2013, 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 inferrer_visitor;
 
 import '../dart2jslib.dart' hide Selector, TypedSelector;
 import '../dart_types.dart';
 import '../elements/elements.dart';
 import '../tree/tree.dart';
@@ skipping 205 matching lines @@
   }
 }
 
 /**
  * Placeholder for inferred arguments types on sends.
  */
 class ArgumentsTypes<T> {
   final List<T> positional;
   final Map<String, T> named;
   ArgumentsTypes(this.positional, named)
-    : this.named = (named == null || named.isEmpty) ? const {} : named;
+    : this.named = (named == null || named.isEmpty) ? const {} : named {
+    assert(this.positional.every((T type) => type != null));
+    assert(this.named.values.every((T type) => type != null));
+  }
 
   int get length => positional.length + named.length;
 
   String toString() => "{ positional = $positional, named = $named }";
 
   bool operator==(other) {
     if (positional.length != other.positional.length) return false;
     if (named.length != other.named.length) return false;
     for (int i = 0; i < positional.length; i++) {
       if (positional[i] != other.positional[i]) return false;
@@ skipping 902 matching lines @@
     return type;
   }
 
   T visitCascade(Cascade node) {
     // Ignore the result of the cascade send and return the type of the cascade
     // receiver.
     visit(node.expression);
     return cascadeReceiverStack.removeLast();
   }
 }