From ce4f354defd5f888dfc0bc8feba0396d734ee87f Mon Sep 17 00:00:00 2001
From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sat, 10 Sep 2022 06:52:39 +0200
Subject: [PATCH] Make a flymake.texi code example more resilient

* doc/misc/flymake.texi (An annotated example backend): Make the
example code resilient wrt. narrowed buffers (bug#51437).
---
 doc/misc/flymake.texi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/misc/flymake.texi b/doc/misc/flymake.texi
index b4e7f3a41f8..7406557623f 100644
--- a/doc/misc/flymake.texi
+++ b/doc/misc/flymake.texi
@@ -801,6 +801,7 @@ Binding,,, elisp, The Emacs Lisp Reference Manual}) to be active.
                        for type = (if (string-match "^warning" msg)
                                       :warning
                                     :error)
+                       when (and beg end)
                        collect (flymake-make-diagnostic source
                                                         beg
                                                         end
-- 
2.39.2