tree daffabc9665fe9db715d538b24ba0bafc9345078
parent c075e197d6453939bce6253ebb4fdb5dffaeb6c7
author Jeremy Hylton <jeremy@alum.mit.edu> 1027613175 +0000
committer Jeremy Hylton <jeremy@alum.mit.edu> 1027613175 +0000
HG:extra convert_revision:svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/python/branches/legacy-trunk%4027767

Complain if __len__() returns < 0, just like classic classes.

Fixes SF bug #575773.

Bug fix candidate.