[mutter/wip/fix-barrier-leak] barriers: Free backend implementation at dispose time

[Ray Strode <halfline src gnome org>]

commit 1e78d90a37903d1eaef8f503bf7711a6829df82e
Author: Ray Strode <rstrode redhat com>
Date:   Fri Sep 25 14:04:31 2020 -0400

    barriers: Free backend implementation at dispose time
    
    When a MetaBarrier is first created it allocates a backend
    impl object which does the actual heavy lifting.
    
    Unfortunately, that backend object is never freed.
    
    This commit ensures the implementation gets freed when
    the barrier object is freed.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1451

 src/backends/meta-barrier.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/backends/meta-barrier.c b/src/backends/meta-barrier.c
index ad6c8d5833..71536c3d71 100644
--- a/src/backends/meta-barrier.c
+++ b/src/backends/meta-barrier.c
@@ -128,6 +128,7 @@ static void
 meta_barrier_dispose (GObject *object)
 {
   MetaBarrier *barrier = META_BARRIER (object);
+  MetaBarrierPrivate *priv = barrier->priv;
 
   if (meta_barrier_is_active (barrier))
     {
@@ -135,6 +136,8 @@ meta_barrier_dispose (GObject *object)
                 barrier);
     }
 
+  g_clear_object (&priv->impl);
+
   G_OBJECT_CLASS (meta_barrier_parent_class)->dispose (object);
 }