From 473e65ba01a1593ac40853fb3ab8d087390604ce Mon Sep 17 00:00:00 2001
From: juha <juha@lazarus-ide.org>
Date: Sat, 12 Dec 2020 18:45:29 +0000
Subject: [PATCH] =?UTF-8?q?IDE:=20Prevent=20an=20infinite=20loop=20when=20?=
 =?UTF-8?q?comparing=20files.=20Issue=20#38185,=20patch=20from=20Domingo?=
 =?UTF-8?q?=20Galm=C3=A9s.?=
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git-svn-id: trunk@64199 -
---
 ide/diffpatch.pas | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ide/diffpatch.pas b/ide/diffpatch.pas
index 4142fedd7e..ac89b2e972 100644
--- a/ide/diffpatch.pas
+++ b/ide/diffpatch.pas
@@ -616,6 +616,8 @@ begin
       // chomp empty lines at end
       fPart1.GetPrevLineExtends(Cur1);
       fPart2.GetPrevLineExtends(Cur2);
+      if (Cur1.LineNumber < 1) or (Cur2.LineNumber < 1) then
+        break;
     until not LinesAreEqual(Cur1,Cur2);
   end;
 end;