Merged revisions 77789 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r77789 | benjamin.peterson | 2010-01-26 20:16:42 -0600 (Tue, 26 Jan 2010) | 1 line

  raise a clear TypeError when trying to register a non-class
........

1 files changed, 1 insertions, 1 deletions

diff --git a/Lib/abc.py b/Lib/abc.py
index f9b49ac..0f98036 100644
--- a/Lib/abc.py
+++ b/Lib/abc.py
@@ -94,7 +94,7 @@ class ABCMeta(type):
 
     def register(cls, subclass):
         """Register a virtual subclass of an ABC."""
-        if not isinstance(cls, type):
+        if not isinstance(subclass, type):
             raise TypeError("Can only register classes")
         if issubclass(subclass, cls):
             return  # Already a subclass