client: Make sure screens stay virtual siblings during reconnect

The virtual siblings of QWaylandScreen are constructed from the
list of screens in QWaylandDisplay. It is important that when a window
changes screens due to handleScreenRemoved that the screens are siblings
otherwise the platformwindow is destroyed and window becomes hidden.

Pick-to: 6.6
Change-Id: I7ceeee4e18fbdfa936fe987441d35b8a5cb1eefd
Reviewed-by: David Edmundson <davidedmundson@kde.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/client/qwaylanddisplay.cpp b/src/client/qwaylanddisplay.cpp
index 03ec75a60..1c399765e 100644
--- a/src/client/qwaylanddisplay.cpp
+++ b/src/client/qwaylanddisplay.cpp
@@ -421,9 +421,9 @@ void QWaylandDisplay::reconnect()
     qDeleteAll(mWaitingScreens);
     mWaitingScreens.clear();
 
-    const auto screens = std::exchange(mScreens, {});
-    ensureScreen();
-    for (QWaylandScreen *screen : screens) {
+    while (!mScreens.isEmpty()) {
+        auto screen = mScreens.takeLast();
+        ensureScreen();
         QWindowSystemInterface::handleScreenRemoved(screen);
     }