From 98f38b01997ec59aa5040f839deb6f062f01be17 Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Fri, 13 Oct 2017 15:44:09 +0200
Subject: Fix crash when opening a window with a hidden parent

We have a transient parent but it doesn't have a shell surface.
We need to make sure that it exists before setting the transient
parent's shell surface as the parent to the window.

Change-Id: I918b2f14074217638529ba73530f0102f7438079
Reviewed-by: David Edmundson <davidedmundson@kde.org>
Reviewed-by: Pier Luigi Fiorini <pierluigi.fiorini@liri.io>
---
 src/client/qwaylandxdgshellv6.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/client/qwaylandxdgshellv6.cpp b/src/client/qwaylandxdgshellv6.cpp
index cd81778c7..d9302ed57 100644
--- a/src/client/qwaylandxdgshellv6.cpp
+++ b/src/client/qwaylandxdgshellv6.cpp
@@ -169,7 +169,8 @@ void QWaylandXdgSurfaceV6::setType(Qt::WindowType type, QWaylandWindow *transien
         setToplevel();
         if (transientParent) {
             auto parentXdgSurface = static_cast<QWaylandXdgSurfaceV6 *>(transientParent->shellSurface());
-            m_toplevel->set_parent(parentXdgSurface->m_toplevel->object());
+            if (parentXdgSurface)
+                m_toplevel->set_parent(parentXdgSurface->m_toplevel->object());
         }
     }
 }
-- 
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