https://bugs.gentoo.org/957100
https://bugs.kde.org/show_bug.cgi?id=500577
https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/commit/011d08c340bab468eec6aa347ae138e40c6332cf

From 011d08c340bab468eec6aa347ae138e40c6332cf Mon Sep 17 00:00:00 2001
From: David Redondo <kde@david-redondo.de>
Date: Tue, 3 Jun 2025 12:10:34 +0200
Subject: [PATCH] screencast: Guard against session closing while creating
 stream

Starting a stream runs an event loop during which the session can
be closed. For now use a QPointer to guard against that until
we make it not use an event loop anymore.
BUG:500577
FIXED-IN:6.4


(cherry picked from commit 13a19d1db5562d45477c6fa2cb53c3f40d7c60ed)

Co-authored-by: David Redondo <kde@david-redondo.de>
---
 src/screencast.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/screencast.cpp b/src/screencast.cpp
index d0841a96..510f5242 100644
--- a/src/screencast.cpp
+++ b/src/screencast.cpp
@@ -282,6 +282,7 @@
         QVariantList outputs;
         QList<WindowRestoreInfo> windows;
         WaylandIntegration::Streams streams;
+        QPointer<ScreenCastSession> guardedSession(session);
         Screencasting::CursorMode cursorMode = Screencasting::CursorMode(session->cursorMode());
         for (const auto &output : std::as_const(selectedOutputs)) {
             WaylandIntegration::Stream stream;
@@ -332,6 +333,10 @@
             return 2;
         }
 
+        if (!guardedSession) {
+            return 2;
+        }
+
         session->setStreams(streams);
         results.insert(QStringLiteral("streams"), QVariant::fromValue<WaylandIntegration::Streams>(streams));
         if (allowRestore) {