Fix handling of sends with wrong arity

sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart

Index: sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart b/sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart
index 1d8731d2a19aaa59156709536720465c44e3462f..c13831a1eca10c261322ab971188534a71ec5620 100644
--- a/sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart
+++ b/sdk/lib/_internal/compiler/implementation/types/concrete_types_inferrer.dart
@@ -601,13 +601,11 @@ class ConcreteTypesInferrer {
     ConcreteType result = new ConcreteType.empty();
     Map<Element, ConcreteType> argumentMap =
         associateArguments(function, argumentsTypes);
-    argumentMap.forEach((Element parameter, ConcreteType type) {
-      augmentParameterType(parameter, type);
-    });
     // if the association failed, this send will never occur or will fail
     if (argumentMap == null) {
       return new ConcreteType.empty();
     }
+    argumentMap.forEach(augmentParameterType);
     ConcreteTypeCartesianProduct product =
         new ConcreteTypeCartesianProduct(receiverType, argumentMap);
     for (ConcreteTypesEnvironment environment in product) {