help-setup-xref: Clean up xref backend before non-Lisp uses

* lisp/help-mode.el (help-setup-xref): Kill more local variables,
previously set in help-fns--setup-xref-backend (bug#69462).

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index e16408be7b0..b6757fcdbf1 100644
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -518,7 +518,9 @@ restore it properly when going back."
               outline-minor-mode-highlight
               outline-minor-mode-use-buttons
               outline-default-state
-              outline-default-rules)))
+              outline-default-rules
+              xref-backend-functions
+              semantic-symref-filepattern-alist)))
     (when help-xref-stack-item
       (push (cons (point) help-xref-stack-item) help-xref-stack)
       (setq help-xref-forward-stack nil))