Error in `gnus-topic-select-group'

[Dan Davison]

Using today's gnus git HEAD with emacs 23 and 24, I

  - Start gnus
  - nntp groups appear with an asterisk before their names, indicating
    that they are not yet opened
  - Hit RET (gnus-topic-select-group)
  - I get an error in the function `gnus-agent-possibly-alter-active'
    when evaluating (setcdr active agent-max):

  Wrong type argument: consp, nil

  This results from the expression 

  (gnus-agent-possibly-alter-active group (gnus-active group) info)

  in function `gnus-select-newsgroup', where the expression
  (gnus-active group) returns nil, which becomes the `active' argument
  to `gnus-agent-possibly-alter-active'.


Dan