From: Philipp Stephani <phst@google.com>
Date: Sat, 10 Apr 2021 19:54:12 +0000 (+0200)
Subject: * etc/NEWS: Extend paragraph about &define form and backtracking
X-Git-Tag: emacs-28.0.90~2930
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=1d474ad69d19d01b047012734530fb4c5eb82144;p=emacs.git

* etc/NEWS: Extend paragraph about &define form and backtracking
---

diff --git a/etc/NEWS b/etc/NEWS
index 328c38c1189..5e37b38b90e 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -2535,8 +2535,11 @@ back in Emacs 23.1.  The affected functions are: 'make-obsolete',
 
 ** The 'values' variable is now obsolete.
 
-** The '&define' keyword in an Edebug specification now disables
-backtracking.
++++
+** The '&define' keyword in an Edebug specification now disables backtracking.
+The implementation was buggy, and multiple &define forms in an &or
+form should be exceedingly rare.  See the Info node 'Backtracking' in
+the Emacs Lisp reference manual for background.
 
 
 * Lisp Changes in Emacs 28.1