From 65eae54dc4bcc052313f5bbcc915991a6b30d49e Mon Sep 17 00:00:00 2001
From: Silas Dohm <silas.dohm@stud.hs-bochum.de>
Date: Tue, 23 Aug 2022 22:57:27 +0200
Subject: [PATCH] removed double connection

---
 window.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/window.cpp b/window.cpp
index f19a03e..2b7236e 100644
--- a/window.cpp
+++ b/window.cpp
@@ -53,10 +53,11 @@ Window::Window(QWidget *parent)
             for (int d = 0; d < 9; d++) // rows and columns
             {
                 connect(&grid[x + y * 9], SIGNAL(update(int)), &grid[x + d * 9], SLOT(removeOption(int)));
-                connect(&grid[x + y * 9], SIGNAL(update(int)), &grid[d + y * 9], SLOT(removeOption(int)));
-
                 connect(&grid[x + y * 9], SIGNAL(undo(int)), &grid[x + d * 9], SLOT(addOption(int)));
-                connect(&grid[x + y * 9], SIGNAL(undo(int)), &grid[d + y * 9], SLOT(addOption(int)));
+                if(&grid[x+y*9]!= &grid[d+y*9]){
+                    connect(&grid[x + y * 9], SIGNAL(update(int)), &grid[d + y * 9], SLOT(removeOption(int)));
+                    connect(&grid[x + y * 9], SIGNAL(undo(int)), &grid[d + y * 9], SLOT(addOption(int)));
+                }
             }
             int a = x / 3 * 3;
             int b = y / 3 * 3;
-- 
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