Hi all,

The below patch fixes this bug for me.

I simply promoted the priority of isearch-regexp in that cond.

I hope I am not overlooking something else by doing so.

With that, now C-u C-s shows "Regexp I-search:" when the search of
search-default-mode is either nil or character-fold-to-regexp.


diff --git a/lisp/isearch.el b/lisp/isearch.el
index b8ada2c..47dedfa 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -2575,12 +2575,12 @@ isearch--describe-regexp-mode
     (setq regexp-function #'word-search-regexp))
   (let ((description
          ;; Don't use a description on the default search mode.
-         (cond ((equal regexp-function search-default-mode) "")
+         (cond (isearch-regexp "regexp ")
+               ((equal regexp-function search-default-mode) "")
                (regexp-function
                 (and (symbolp regexp-function)
                      (or (get regexp-function 'isearch-message-prefix)
                          "")))
-               (isearch-regexp "regexp ")
                ;; We're in literal mode. If the default mode is not
                ;; literal, then describe it.
                ((functionp search-default-mode) "literal "))))


Apologies for earlier misunderstanding that this bug had to do with
character-fold.el.

--
Kaushal Modi