[gegl] node: disconnect node edges before replacing operation object

[N/A <ell src gnome org>]

commit a273733acfd006b979673a44a2f98aa31a788318
Author: Ell <ell_se yahoo com>
Date:   Mon May 15 16:21:18 2017 -0400

    node: disconnect node edges before replacing operation object
    
    When setting a node's operation object, disconnect existing edges
    while node->operation still points to the previous object.
    Otherwise, signal handlers that get called during edge removal may
    see the node in an intermediate state.

 gegl/graph/gegl-node.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gegl/graph/gegl-node.c b/gegl/graph/gegl-node.c
index 45d4477..4f2488a 100644
--- a/gegl/graph/gegl-node.c
+++ b/gegl/graph/gegl-node.c
@@ -1247,11 +1247,6 @@ gegl_node_set_operation_object (GeglNode      *self,
 
   g_return_if_fail (GEGL_IS_OPERATION (operation));
 
-  if (self->operation)
-    g_object_unref (self->operation);
-
-  self->operation = g_object_ref (operation);
-
   if (gegl_node_has_pad (self, "output"))
     gegl_node_get_consumers (self, "output", &consumer_nodes, &consumer_names);
 
@@ -1262,6 +1257,11 @@ gegl_node_set_operation_object (GeglNode      *self,
   gegl_node_disconnect_sources (self);
   gegl_node_disconnect_sinks (self);
 
+  if (self->operation)
+    g_object_unref (self->operation);
+
+  self->operation = g_object_ref (operation);
+
   /* Delete all the pads from the previous operation */
   while (self->pads)
     gegl_node_remove_pad (self, self->pads->data);