From 77ff44216a0b23946d738f106ea8e255f96b18f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20L=C3=BCbking?= <thomas.luebking@gmail.com>
Date: Sat, 8 Dec 2012 14:52:32 +0100
Subject: [PATCH] invalidate old shade_below before searching a new

for the search could be implicitly skipped and we end up
with a dangeling pointer

BUG: 311340
FIXED-IN: 4.10
---
 client.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/client.cpp b/client.cpp
index fa16234def..b555c11cc6 100644
--- a/client.cpp
+++ b/client.cpp
@@ -983,6 +983,8 @@ void Client::setShade(ShadeMode mode)
             setActive(true);
         if (shade_mode == ShadeHover) {
             ToplevelList order = workspace()->stackingOrder();
+            // invalidate, since "this" could be the topmost toplevel and shade_below dangeling
+            shade_below = NULL;
             // this is likely related to the index parameter?!
             for (int idx = order.indexOf(this) + 1; idx < order.count(); ++idx) {
                 shade_below = qobject_cast<Client*>(order.at(idx));