It's not possible to use xrange inside __getslice__ in 64bit python on

Windows, because xrange uses 32bit integers and __getslice__ gets 64bit integers

doc/CHANGES.rst

@@ -13,6 +13,9 @@ Bugs Fixed
 
 - Fixed two unit tests that failed on fast Windows machines.
 
+- Fixed OverflowError in Products.ZCatalog.Lazy on 64bit python
+  on Windows.
+
 - Fixed ``testZODBCompat`` tests in ZopeTestCase to match modern ZODB
   semantics.
 

src/Products/ZCatalog/Lazy.py

@@ -11,6 +11,9 @@
 #
 ##############################################################################
 
+from itertools import islice, count
+
+
 class Lazy(object):
 
     # Allow (reluctantly) access to unprotected attributes
@@ -43,7 +46,7 @@ class Lazy(object):
 
     def __getslice__(self, i1, i2):
         r = []
-        for i in xrange(i1, i2):
+        for i in islice(count(i1), i2-i1):
             try:
                 r.append(self[i])
             except IndexError: