copy the list of packages to initialize. install_package calls...

copy the list of packages to initialize. install_package calls package_initialized which removes from the list

doc/CHANGES.rst

@@ -11,6 +11,9 @@ http://docs.zope.org/zope2/releases/.
 Bugs Fixed
 ++++++++++
 
+- Avoid iterating over the list of packages to initialize while it is being
+  mutated, which was skipping some packages.
+
 - Fixed two unit tests that failed on fast Windows machines.
 
 - Fixed OverflowError in Products.ZCatalog.Lazy on 64bit python

src/OFS/Application.py

@@ -535,7 +535,7 @@ def install_products(app):
                         folder_permissions, raise_exc=debug_mode)
 
     # Delayed install of packages-as-products
-    for module, init_func in get_packages_to_initialize():
+    for module, init_func in tuple(get_packages_to_initialize()):
         install_package(app, module, init_func, raise_exc=debug_mode)
 
     Products.meta_types=Products.meta_types+tuple(meta_types)