[BUG]: Gnus 5.6.13 (gnus-1.18-pkg.tar.gz)

I am a little confused by this one... Signaling: (invalid-function (macro lambda (&optional n) (backquote (delete-region (progn (beginning-of-line) (point)) (progn (forward-line (\, (or n 1))) (point)))))) gnus-delete-line() nnmail-article-group(nnml-active-number) nnmail-check-duplication("<000e01bda598$c6d6f470$71b1e891(a)a51nt01.einev.ch>" nnml-save-mail nnml-active-number) nnmail-process-unix-mail-format(nnml-save-mail nnml-active-number) nnmail-split-incoming("~/.gnus-crash-box" nnml-save-mail nil nil nnml-active-number) nnmail-get-new-mail(nnml nnml-save-nov "~/Mail" nil) nnml-request-scan(nil "") gnus-request-scan(nil (nnml "")) gnus-read-active-file() gnus-group-get-new-news(nil) call-interactively(gnus-group-get-new-news) Oscar