From b4d6ba117033bd8bd841c5f0aa0e637fa204eaf8 Mon Sep 17 00:00:00 2001
From: HD Moore <hd_moore@rapid7.com>
Date: Thu, 1 Oct 2009 16:47:48 +0000
Subject: [PATCH] Check for nil before trying to replace a line

git-svn-id: file:///home/svn/framework3/trunk@7108 4d416f70-5f16-0410-b530-b9f4589650da
---
 lib/rbreadline.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/rbreadline.rb b/lib/rbreadline.rb
index f8774c2b8d..2f849b8aaa 100644
--- a/lib/rbreadline.rb
+++ b/lib/rbreadline.rb
@@ -4184,7 +4184,9 @@ module RbReadline
       #   the location.
       if (cxt.sflags & SF_FOUND)!=0
          cxt.prev_line_found = cxt.lines[cxt.history_pos]
-         rl_replace_line(cxt.lines[cxt.history_pos], false)
+         if (cxt.prev_line_found)
+           rl_replace_line(cxt.lines[cxt.history_pos], false)
+         end
          @rl_point = cxt.sline_index
          cxt.last_found_line = cxt.history_pos
          rl_display_search(cxt.search_string, (cxt.sflags & SF_REVERSE)!=0, (cxt.history_pos == cxt.save_line) ? -1 : cxt.history_pos)