[gnome-builder] flatpak: ensure widget access after task propagation

[Christian Hergert <chergert src gnome org>]

commit a67fc2ecea8134bb1f09d2013987ac6bd7d1e291
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jul 8 01:16:27 2018 +0200

    flatpak: ensure widget access after task propagation
    
    Normally, we dispose of the source_object and task_data when the
    IdeTask propagates the return value. This helps ensure that we
    avoid leaks and protect against objects finalized in the wrong
    thread. However, we need access to the widget in this case so
    we need to keep the source_object around.
    
    We still get the protection from the threaded worker sending the
    result back with the task reference.
    
    Fixes #560

 src/plugins/flatpak/gbp-flatpak-clone-widget.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-clone-widget.c b/src/plugins/flatpak/gbp-flatpak-clone-widget.c
index 0bb8e67c7..823c0bfcd 100644
--- a/src/plugins/flatpak/gbp-flatpak-clone-widget.c
+++ b/src/plugins/flatpak/gbp-flatpak-clone-widget.c
@@ -582,6 +582,8 @@ gbp_flatpak_clone_widget_clone_async (GbpFlatpakCloneWidget   *self,
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
   task = ide_task_new (self, cancellable, callback, user_data);
+  ide_task_set_source_tag (task, gbp_flatpak_clone_widget_clone_async);
+  ide_task_set_release_on_propagate (task, FALSE);
 
   src = get_source (self, &error);
   if (src == NULL)