While upgrading our svn server to 1.4.2 we noticed this issue when validating
the authz file:
svnauthz-validate: Circular dependency between groups 'admins' and 'devs2'
The algorithm to find circular dependencies seems to match the case where a
group includes another group through two paths.
admins = admin1, admin2
devs1 = @admins, dev1
devs2 = @admins, dev2
users = @devs1, @devs2, user1, user2
The users group includes the admins group through devs1 and devs2. While in my
opinion this is correct behavior, authz-validate and mod_authz_svn seem to think
This works in svn 1.2.3, so I think it's just the authz validation code added in
r15400 that's at fault here.