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

Index: sdk/lib/_internal/compiler/implementation/inferrer/inferrer_visitor.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/inferrer/inferrer_visitor.dart	(revision 28918)
+++ sdk/lib/_internal/compiler/implementation/inferrer/inferrer_visitor.dart	(working copy)
@@ -223,7 +223,10 @@
   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;