From 9988fa9d74bb77a20f0b63b267c6600fb2c55437 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Thu, 17 Sep 2015 14:10:57 +0200
Subject: [PATCH] Add safety check for recursive transient for

An AbstractClient cannot be transient for itself.
---
 abstract_client.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/abstract_client.cpp b/abstract_client.cpp
index dc6a312547..bb4f14dac0 100644
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -886,6 +886,10 @@ bool AbstractClient::performMouseCommand(Options::MouseCommand cmd, const QPoint
 
 void AbstractClient::setTransientFor(AbstractClient *transientFor)
 {
+    if (transientFor == this) {
+        // cannot be transient for one self
+        return;
+    }
     if (m_transientFor == transientFor) {
         return;
     }