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From d72da0b4b2ee089156d1bd614523838b1635bbf5 Mon Sep 17 00:00:00 2001
From: Shawn Rutledge <shawn.rutledge@theqtcompany.com>
Date: Fri, 4 Sep 2015 13:27:48 +0200
Subject: [PATCH] xcb: fix yet another crash when screens are disconnected
Can't assume that m_screens is not an empty list.
Task-number: QTBUG-42985
Change-Id: I6f9422638c219123dc898813910d03c7afbd1450
Reviewed-by: Uli Schlachter <psychon@znc.in>
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
---
src/plugins/platforms/xcb/qxcbconnection.cpp | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -1288,10 +1288,12 @@
memset(&event, 0, sizeof(event));
const xcb_window_t eventListener = xcb_generate_id(m_connection);
+ xcb_screen_iterator_t it = xcb_setup_roots_iterator(m_setup);
+ xcb_screen_t *screen = it.data;
Q_XCB_CALL(xcb_create_window(m_connection, XCB_COPY_FROM_PARENT,
- eventListener, m_screens.at(0)->root(),
+ eventListener, screen->root,
0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY,
- m_screens.at(0)->screen()->root_visual, 0, 0));
+ screen->root_visual, 0, 0));
event.response_type = XCB_CLIENT_MESSAGE;
event.format = 32;
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