[Zope-dev] Adapter for class with slots

[Shane Hathaway]

Wolfgang Schnerring wrote:
> The minimal reproduction recipe to see the error is this:
> 
>     class Slotted(object):
>         __slots__ = ('__provides__')
> 
>     zope.component.provideAdapter(
>         lambda x: True, (Slotted,), zope.interface.Interface)
> 
> Which will raise
>   File "/home/wosc/.python-eggs/zope.component-3.7.1-py2.6.egg/zope/component/registry.py",
>   line 419, in _getAdapterRequired
>       elif not ISpecification.providedBy(r):
>   TypeError: 'member_descriptor' object is not callable
> 
> Why is this? Can this be made to work? How would I go about
> investigating that?

It looks to me like a possible bug in zope.interface.  Try deleting 
_zope_interface_coptimizations.so to hopefully expand that traceback.

Shane