* gnus-agent.el (gnus-agent-regenerate-group): Added interactive form.

[gnus] / lisp / nnmail.el

diff --git a/lisp/nnmail.el b/lisp/nnmail.el
index 4851711..cb1fb79 100644 (file)
--- a/lisp/nnmail.el
+++ b/lisp/nnmail.el
@@ -786,7 +786,9 @@ If SOURCE is a directory spec, try to return the group name component."
     (if (not (and (re-search-forward "^From " nil t)
                  (goto-char (match-beginning 0))))
        ;; Possibly wrong format?
-       (error "Error, unknown mail format! (Possibly corrupted.)")
+       (error "Error, unknown mail format! (Possibly corrupted %s `%s'.)"
+              (if (buffer-file-name) "file" "buffer")
+              (or (buffer-file-name) (buffer-name)))
       ;; Carry on until the bitter end.
       (while (not (eobp))
        (setq start (point)