From d3ec00991e9797109cfec9a304c0cfc7e2d3e70f Mon Sep 17 00:00:00 2001
From: Basile Burg <basile.b@gmx.com>
Date: Sat, 16 Nov 2019 07:10:08 +0100
Subject: [PATCH] fix possible range error when renaming an identifier

---
 src/u_synmemo.pas | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/u_synmemo.pas b/src/u_synmemo.pas
index 9d9777f4..d266a3f8 100644
--- a/src/u_synmemo.pas
+++ b/src/u_synmemo.pas
@@ -1998,6 +1998,8 @@ begin
     exit;
   p := CaretXY;
   line := lineText;
+  if (line.length = 1) or (LogicalCaretXY.X > line.length) then
+    exit;
   if (CaretX = 1) or not (line[LogicalCaretXY.X] in IdentChars) or
     not (line[LogicalCaretXY.X-1] in IdentChars) then
       exit;