Patch-Source: https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/6180
https://gitlab.gnome.org/GNOME/gtk/-/issues/5775
--
From 7ca33ff9941ad8565979eb0873c8bc14e31397d2 Mon Sep 17 00:00:00 2001
From: Luca Bacci <luca.bacci982@gmail.com>
Date: Tue, 11 Jul 2023 10:33:08 +0200
Subject: [PATCH] GtkApplicationImplDBus: Cancel DBus method calls on shutdown

We do that for method calls where a non-NULL GAsyncReadyCallback
is passed.

Fixes #5775
---
 gtk/gtkapplication-dbus.c   | 21 +++++++++++++++------
 gtk/gtkapplicationprivate.h |  1 +
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/gtk/gtkapplication-dbus.c b/gtk/gtkapplication-dbus.c
index 2c9a1a78efb..a663aede49b 100644
--- a/gtk/gtkapplication-dbus.c
+++ b/gtk/gtkapplication-dbus.c
@@ -248,8 +248,10 @@ ss_get_active_cb (GObject      *source,
   ret = g_dbus_proxy_call_finish (proxy, result, &error);
   if (ret == NULL)
     {
-      g_warning ("Getting screensaver status failed: %s", error->message);
-      g_error_free (error);
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+        g_warning ("Getting screensaver status failed: %s",
+                   error ? error->message : "");
+      g_clear_error (&error);
       return;
     }
 
@@ -270,8 +272,10 @@ create_monitor_cb (GObject      *source,
   ret = g_dbus_proxy_call_finish (proxy, result, &error);
   if (ret == NULL)
     {
-      g_warning ("Creating a portal monitor failed: %s", error->message);
-      g_error_free (error);
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+        g_warning ("Creating a portal monitor failed: %s",
+                   error ? error->message : "");
+      g_clear_error (&error);
       return;
     }
 
@@ -302,6 +306,8 @@ gtk_application_impl_dbus_startup (GtkApplicationImpl *impl,
   if (gtk_should_use_portal ())
     goto out;
 
+  dbus->cancellable = g_cancellable_new ();
+
   g_debug ("Connecting to session manager");
 
   /* Try the GNOME session manager first */
@@ -368,7 +374,7 @@ gtk_application_impl_dbus_startup (GtkApplicationImpl *impl,
                          NULL,
                          G_DBUS_CALL_FLAGS_NONE,
                          G_MAXINT,
-                         NULL,
+                         dbus->cancellable,
                          ss_get_active_cb,
                          dbus);
     }
@@ -515,7 +521,7 @@ gtk_application_impl_dbus_startup (GtkApplicationImpl *impl,
                              g_variant_new ("(sa{sv})", "", &opt_builder),
                              G_DBUS_CALL_FLAGS_NONE,
                              G_MAXINT,
-                             NULL,
+                             dbus->cancellable,
                              create_monitor_cb, dbus);
           g_free (token);
         }
@@ -527,6 +533,8 @@ end:;
 static void
 gtk_application_impl_dbus_shutdown (GtkApplicationImpl *impl)
 {
+  GtkApplicationImplDBus *dbus = (GtkApplicationImplDBus *) impl;
+  g_cancellable_cancel (dbus->cancellable);
 }
 
 GQuark gtk_application_impl_dbus_export_id_quark (void);
@@ -902,6 +910,7 @@ gtk_application_impl_dbus_finalize (GObject *object)
   if (dbus->ss_proxy)
     g_signal_handlers_disconnect_by_func (dbus->ss_proxy, screensaver_signal_session, dbus->impl.application);
   g_clear_object (&dbus->ss_proxy);
+  g_clear_object (&dbus->cancellable);
 
   G_OBJECT_CLASS (gtk_application_impl_dbus_parent_class)->finalize (object);
 }
diff --git a/gtk/gtkapplicationprivate.h b/gtk/gtkapplicationprivate.h
index 01b674a709a..c76b2e8840f 100644
--- a/gtk/gtkapplicationprivate.h
+++ b/gtk/gtkapplicationprivate.h
@@ -117,6 +117,7 @@ typedef struct
   GtkApplicationImpl impl;
 
   GDBusConnection *session;
+  GCancellable    *cancellable;
 
   const gchar     *application_id;
   const gchar     *unique_name;
-- 
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