Merge pull request #2361 from KhronosGroup/fix_2357

Fix #2357 fix crash with option full hierarchy

addons/io_scene_gltf2/blender/exp/tree.py

@@ -160,7 +160,7 @@ def recursive_node_traverse(self, blender_object, blender_bone, parent_uuid, par
             #       2. Old Dupli vertices feature
             # For any other case, children are real children
             if (self.nodes[parent_uuid].blender_type == VExportNode.INST_COLLECTION or original_object is not None) or \
-                    (self.nodes[parent_uuid].blender_object is not None and self.nodes[parent_uuid].blender_object.is_instancer is True):
+                    (self.nodes[parent_uuid].blender_type != VExportNode.COLLECTION and self.nodes[parent_uuid].blender_object is not None and self.nodes[parent_uuid].blender_object.is_instancer is True):
                 self.nodes[parent_uuid].children_type[node.uuid] = VExportNode.CHILDREN_IS_IN_COLLECTION if is_children_in_collection is True else VExportNode.CHILDREN_REAL
             else:
                 # We are in a regular case where children are real children