On Fri, Aug 7, 2009 at 14:55, Martijn Pieters <m...@zopatista.com> wrote: > Here is the simple test case: > > from Acquisition import Implicit > > class Root(Implicit): > pass > > class Slicer(Implicit): > def __getslice__(self, start, end): > return [start, end] > > root = Root() > slicer = Slicer().__of__(root) > print slicer[1:] > > Run this as bin/zopepy acquisition.py and verify that [1, -1] is > printed on 64-bit platforms as opposed to [1, 2147483647] on 32-bit > platforms.
Further datapoints, the following extra lines for the above script give more context to compare: import sys print slicer[sys.maxint:] print slicer[sys.maxint-1:] print Slicer()[1:] So we pass in sys.maxint and sys.maxint-1 as start values, and also run the Slicer without acquisition wrapping to demonstrate that the wrapper is the culprit, not python itself. Python passes in sys.maxint for the end value for the slice if you omit it, and these high values overflow somewhere in the wraper. -- Martijn Pieters _______________________________________________ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
