Fix rx-any with range with ?\] and ?-

* lisp/emacs-lisp/rx.el: Make sure not to produce a circular
list (Bug#25123).
* test/lisp/emacs-lisp/rx-tests.el (rx-char-any): New test.

diff --git a/lisp/emacs-lisp/rx.el b/lisp/emacs-lisp/rx.el
index 66d295e221f77deab3b08a47b7fcbe564fa122bf..d305597631ad24ae40afba3918076cf66cbdc5ba 100644 (file)
--- a/lisp/emacs-lisp/rx.el
+++ b/lisp/emacs-lisp/rx.el
@@ -521,7 +521,7 @@ ARG is optional."
             (setq args (nconc (delq ?- args) (list ?-))))
            ((setq m (assq ?- args))
             ;; next to the bracket's range, make the second range
-            (setcdr args (cons m (delq m args))))))
+            (setcdr args (cons m (delq m (cdr args)))))))
      ;; bracket in the end range
      ;;         => "[]...-]"
      ((setq m (rassq ?\] args))

diff --git a/test/lisp/emacs-lisp/rx-tests.el b/test/lisp/emacs-lisp/rx-tests.el
new file mode 100644 (file)
index 0000000..7ff45f6
--- /dev/null
+++ b/test/lisp/emacs-lisp/rx-tests.el
@@ -0,0 +1,37 @@
+;;; rx-tests.el --- test for rx.el functions -*- lexical-binding: t -*-
+
+;; Copyright (C) 2016 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+(require 'ert)
+(require 'rx)
+
+;;; Code:
+
+(ert-deftest rx-char-any ()
+  "Test character alternatives with `\]' and `-' (Bug#25123)."
+  (should (string-match
+           (rx string-start (1+ (char (?\] . ?\{) (?< . ?\]) (?- . ?:)))
+               string-end)
+           (apply #'string (nconc (number-sequence ?\] ?\{)
+                                  (number-sequence ?< ?\])
+                                  (number-sequence ?- ?:))))))
+
+(provide 'rx-tests)
+;; rx-tests.el ends here.