From 7a116ac3f02dc91ea2424d03facaa6a9f06310ae Mon Sep 17 00:00:00 2001
From: Johan Klokkhammer Helsing <johan.helsing@qt.io>
Date: Thu, 24 Nov 2016 13:50:19 +0100
Subject: [PATCH] Don't crash when trying to run on a compositor without
 outputs

Change-Id: I164ad71f42dff1ad92576729040608016497a56a
Reviewed-by: Jan Arne Petersen <jan.petersen@kdab.com>
Reviewed-by: Giulio Camuffo <giulio.camuffo@kdab.com>
---
 src/plugins/platforms/wayland/qwaylandintegration.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/plugins/platforms/wayland/qwaylandintegration.cpp b/src/plugins/platforms/wayland/qwaylandintegration.cpp
index 748f4f29c8d..78d4284bd9a 100644
--- a/src/plugins/platforms/wayland/qwaylandintegration.cpp
+++ b/src/plugins/platforms/wayland/qwaylandintegration.cpp
@@ -216,6 +216,11 @@ void QWaylandIntegration::initialize()
     int fd = wl_display_get_fd(mDisplay->wl_display());
     QSocketNotifier *sn = new QSocketNotifier(fd, QSocketNotifier::Read, mDisplay.data());
     QObject::connect(sn, SIGNAL(activated(int)), mDisplay.data(), SLOT(flushRequests()));
+
+    if (mDisplay->screens().isEmpty()) {
+        qWarning() << "Running on a compositor with no screens is not supported";
+        ::exit(EXIT_FAILURE);
+    }
 }
 
 QPlatformFontDatabase *QWaylandIntegration::fontDatabase() const