Uniquify and Gnus interaction

[Kai Großjohann]

I'm too tired now to investigate further, but I get this when I try
to exit a Gnus summary buffer:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  directory-file-name(nil)
  uniquify-rationalize-file-buffer-names(nil #<buffer *Dead Summary 
nntp+gmane:gmane.emacs.devel*>)
  (progn (uniquify-rationalize-file-buffer-names (uniquify-buffer-file-name 
...) (current-buffer)) (setq ad-return-value (buffer-name ...)))
  (if uniquify-buffer-name-style (progn (uniquify-rationalize-file-buffer-names 
... ...) (setq ad-return-value ...)))
  (when uniquify-buffer-name-style (uniquify-rationalize-file-buffer-names 
(uniquify-buffer-file-name ...) (current-buffer)) (setq ad-return-value 
(buffer-name ...)))
  (if (null unique) (setq uniquify-managed nil) (when 
uniquify-buffer-name-style (uniquify-rationalize-file-buffer-names ... ...) 
(setq ad-return-value ...)))
  (let (ad-return-value) (setq ad-return-value (ad-Orig-rename-buffer newname 
unique)) (uniquify-maybe-rerationalize-w/o-cb) (if (null unique) (setq 
uniquify-managed nil) (when uniquify-buffer-name-style ... ...)) 
ad-return-value)
  rename-buffer("*Dead Summary nntp+gmane:gmane.emacs.devel*" t)
  gnus-deaden-summary()
  gnus-summary-exit()
  call-interactively(gnus-summary-exit)

I use CVS Emacs with the CVS Gnus from gnus.org.  Both updated maybe
one hour ago.

I'll have a look at it later (after sleeping!) unless somebody is quicker
than me.
-- 
file-error; Data: (Opening input file no such file or directory ~/.signature)