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-rw-r--r--lisp/emacs-lisp/rx.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/rx.el b/lisp/emacs-lisp/rx.el
index b29b870061d..58584f300c9 100644
--- a/lisp/emacs-lisp/rx.el
+++ b/lisp/emacs-lisp/rx.el
@@ -890,7 +890,7 @@ Return (REGEXP . PRECEDENCE)."
(* (or (seq "[:" (+ (any "a-z")) ":]")
(not (any "]"))))
"]")
- anything
+ (not (any "*+?^$[\\"))
(seq "\\"
(or anything
(seq (any "sScC_") anything)