* lisp/progmodes/grep.el (rgrep): Handle the case when `grep-find-command'

is a cons cell.

Fixes: debbugs:9278

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/progmodes/grep.el b/lisp/progmodes/grep.el
index db8e82193b3..31100f3fac2 100644
--- a/lisp/progmodes/grep.el
+++ b/lisp/progmodes/grep.el
@@ -965,7 +965,9 @@ This command shares argument histories with \\[lgrep] and \\[grep-find]."
     (unless (and dir (file-directory-p dir) (file-readable-p dir))
       (setq dir default-directory))
     (if (null files)
-        (if (not (string= regexp grep-find-command))
+        (if (not (string= regexp (if (consp grep-find-command)
+                                     (car grep-find-command)
+                                   grep-find-command)))
             (compilation-start regexp 'grep-mode))
       (setq dir (file-name-as-directory (expand-file-name dir)))
       (require 'find-dired)             ; for `find-name-arg'