Package: python-twisted-core Version: 18.7.0-2~bpo9+1 Severity: serious Hi,
With python-twisted-core and python-attr 16.3.0-1, I get the following error: [...] File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 100, in <module> from twisted.internet import interfaces, protocol, address File "/usr/lib/python2.7/dist-packages/twisted/internet/address.py", line 23, in <module> class IPv4Address(object): File "/usr/lib/python2.7/dist-packages/twisted/internet/address.py", line 37, in IPv4Address type = attr.ib(validator=attr.validators.in_(["TCP", "UDP"])) AttributeError: 'module' object has no attribute 'in_' Upgrading python-attr to the version from backports (17.4.0-2~bpo9+1) works. Kurt