From 032c2cc33320a884a478fd1efd7a03750a6bcca9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Sat, 7 May 2011 11:23:15 +0200
Subject: [PATCH] Ensure that list is not empty before accessing

With settings to animate windows in boxswitch it was
possible that an empty list was accessed when the last
window closed.
BUG: 263306
FIXED-IN: 4.7.0
---
 effects/boxswitch/boxswitch.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/effects/boxswitch/boxswitch.cpp b/effects/boxswitch/boxswitch.cpp
index 449b3f676c..9875499c39 100644
--- a/effects/boxswitch/boxswitch.cpp
+++ b/effects/boxswitch/boxswitch.cpp
@@ -547,6 +547,10 @@ void BoxSwitchEffect::calculateItemSizes()
         qDeleteAll(windows);
         windows.clear();
         if ((mAnimateSwitch && !mProxyActivated) || (mProxyActivated && mProxyAnimateSwitch)) {
+            if (original_windows.isEmpty()) {
+                // can happen when last window is closed.
+                return;
+            }
             int index = original_windows.indexOf(effects->currentTabBoxWindow());
             int leftIndex = index;
             int rightIndex = index + 1;