Commit: a980b2f455a70e85f15683435f2ef70f92bbd09b
Author: Campbell Barton
Date:   Mon Jan 14 14:08:01 2019 +1100
Branches: master
https://developer.blender.org/rBa980b2f455a70e85f15683435f2ef70f92bbd09b

Fix message bus ID remapping

===================================================================

M       source/blender/windowmanager/message_bus/intern/wm_message_bus_rna.c

===================================================================

diff --git 
a/source/blender/windowmanager/message_bus/intern/wm_message_bus_rna.c 
b/source/blender/windowmanager/message_bus/intern/wm_message_bus_rna.c
index 6934f15a644..deaac18ba70 100644
--- a/source/blender/windowmanager/message_bus/intern/wm_message_bus_rna.c
+++ b/source/blender/windowmanager/message_bus/intern/wm_message_bus_rna.c
@@ -145,12 +145,14 @@ static void wm_msg_rna_update_by_id(
                                remove = false;
                        }
                        else {
-                               /* we need to resolve this from the  */
+                               /* We need to resolve this from the new ID 
pointer. */
                                PointerRNA idptr;
                                RNA_id_pointer_create(id_dst, &idptr);
                                PointerRNA ptr;
-                               PropertyRNA *prop;
-                               if (!RNA_path_resolve(&idptr, 
key->msg.params.data_path, &ptr, &prop)) {
+                               PropertyRNA *prop = NULL;
+                               if (RNA_path_resolve(&idptr, 
key->msg.params.data_path, &ptr, &prop) &&
+                                   (prop == NULL) == (key->msg.params.prop == 
NULL))
+                               {
                                        key->msg.params.ptr = ptr;
                                        key->msg.params.prop = prop;
                                        remove = false;

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