Fix query-replace at EOB

* lisp/replace.el (replace-match-maybe-edit): Avoid clobbering
match-data with outdated buffer position.  (Bug#67124)

1 files changed, 5 insertions, 2 deletions

diff --git a/lisp/replace.el b/lisp/replace.el
index 6b06e48c384..7fec54ecb27 100644
--- a/lisp/replace.el
+++ b/lisp/replace.el
@@ -2644,8 +2644,11 @@ passed in.  If LITERAL is set, no checking is done, anyway."
   (replace-match newtext fixedcase literal)
   ;; `query-replace' undo feature needs the beginning of the match position,
   ;; but `replace-match' may change it, for instance, with a regexp like "^".
-  ;; Ensure that this function preserves the match data (Bug#31492).
-  (set-match-data match-data)
+  ;; Ensure that this function preserves the beginning of the match position
+  ;; (bug#31492).  But we need to avoid clobbering the end of the match with
+  ;; the original match-end position, since `replace-match' could have made
+  ;; that incorrect or even invalid (bug#67124).
+  (set-match-data (list (car match-data) (nth 1 (match-data))))
   ;; `replace-match' leaves point at the end of the replacement text,
   ;; so move point to the beginning when replacing backward.
   (when backward (goto-char (nth 0 match-data)))