From b2ecff52106c3be6789925dc6b67950ea575fdc1 Mon Sep 17 00:00:00 2001
From: Ansgar Becker <anse@heidisql.com>
Date: Fri, 1 Nov 2019 12:37:10 +0100
Subject: [PATCH] Fix crash when trying to add a new grid row while a first one
 was not yet saved. Closes #788

---
 source/main.pas | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/source/main.pas b/source/main.pas
index d22e276d..70c8c1b6 100644
--- a/source/main.pas
+++ b/source/main.pas
@@ -9401,8 +9401,12 @@ begin
       Allowed := Results.SaveModifications;
       DisplayRowCountStats(Sender);
     end else if Results.Inserted then begin
-      Results.DiscardModifications;
-      Sender.DeleteNode(OldNode);
+      if NewNode <> nil then begin
+        Results.DiscardModifications;
+        Sender.DeleteNode(OldNode);
+      end else begin
+        Allowed := False;
+      end;
     end;
   end;
 end;