(rmail-variables): Make local variables permanent, so the user can safely

change major modes during an edit.

1 files changed, 18 insertions, 1 deletions

diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 7d6e0490d97..3641f470673 100644
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -580,7 +580,24 @@ Instead, these commands are available:
                                    (user-original-login-name)))))))
   (make-local-variable 'rmail-keywords)
   ;; this gets generated as needed
-  (setq rmail-keywords nil))
+  (setq rmail-keywords nil)
+  ;; Make everything permanent, in case the user switches major modes
+  ;; during an edit.
+  (put 'revert-buffer-function 'permanent-local t)
+  (put 'rmail-last-label 'permanent-local t)
+  (put 'rmail-last-regexp 'permanent-local t)
+  (put 'rmail-deleted-vector 'permanent-local t)
+  (put 'rmail-summary-buffer 'permanent-local t)
+  (put 'rmail-summary-vector 'permanent-local t)
+  (put 'rmail-current-message 'permanent-local t)
+  (put 'rmail-total-messages 'permanent-local t)
+  (put 'require-final-newline 'permanent-local t)
+  (put 'version-control 'permanent-local t)
+  (put 'file-precious-flag 'permanent-local t)
+  (put 'rmail-message-vector 'permanent-local t)
+  (put 'rmail-last-file 'permanent-local t)
+  (put 'rmail-inbox-list 'permanent-local t)
+  (put 'rmail-keywords 'permanent-local t))
 
 ;; Handle M-x revert-buffer done in an rmail-mode buffer.
 (defun rmail-revert (arg noconfirm)