fix cache-invalidation in ProductDispatcher. Fixes all tests that use...

fix cache-invalidation in ProductDispatcher. Fixes all tests that use late-initialized products in test-profiles

CHANGES.rst

@@ -11,6 +11,11 @@ http://docs.zope.org/zope2/
 Bugs Fixed
 ++++++++++
 
+- bobo_traverse of ProductDispatcher did not correctly invalidate cache
+  when a product was not initializes after first access of the cache. Types
+  that were added in test-profiles were not useable.
+  [pbauer, jensens]
+
 - Fix pt_editForm after the help-system was removed.
   [pbauer]
 

src/App/FactoryDispatcher.py

@@ -79,8 +79,8 @@ class ProductDispatcher(Implicit):
         # Try to get a custom dispatcher from a Python product
         global _packages
         try:
-            package = _packages.get(name, None)
-        except NameError:
+            package = _packages[name]
+        except (NameError, KeyError):
             _packages = _product_packages()
             package = _packages.get(name, None)