Doing a call on a getter does not yield the return type of that getter.

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

Index: sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart	(revision 24244)
+++ sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart	(working copy)
@@ -805,6 +805,10 @@
       ContainerTypeMask mask = selector.mask;
       TypeMask elementType = mask.elementType;
       return elementType == null ? dynamicType : elementType;
+    } else if (element.isGetter()) {

[kasperl, 2013/06/21 05:58:00]

What happens if element is a field? Can we ever get an abstract field here?

+      // Closure call.
+      assert(selector.isCall());
+      return dynamicType;
     } else {
       return returnTypeOfElement(element);
     }