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-rw-r--r--lisp/nxml/rng-util.el2
1 files changed, 2 insertions, 0 deletions
diff --git a/lisp/nxml/rng-util.el b/lisp/nxml/rng-util.el
index 0d97f9c3f12..7af6ae231c5 100644
--- a/lisp/nxml/rng-util.el
+++ b/lisp/nxml/rng-util.el
@@ -165,6 +165,8 @@ HIST, if non-nil, specifies a history list as with `completing-read'."
(setq string (substring string 0 -1)))
string)
+(define-error 'rng-error nil)
+
(provide 'rng-util)
;;; rng-util.el ends here