Fix #33628, Segmentation fault after pasting a closed group of nodes into an open group. Finally now there is a proper check for pasting nodes into groups. It uses the poll_instance callback of node types to determine if a node can be added into a specific node tree. Currently this is only implemented for group nodes and does a recursive check to avoid pasting a node group into itself (on any level, also nested groups).

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/nodes/composite/nodes/node_composite_common.c b/source/blender/nodes/composite/nodes/node_composite_common.c
index 44643724073..df1c5d3316b 100644
--- a/source/blender/nodes/composite/nodes/node_composite_common.c
+++ b/source/blender/nodes/composite/nodes/node_composite_common.c
@@ -51,6 +51,7 @@ void register_node_type_cmp_group(void)
 	node_type_base_custom(&ntype, "CompositorNodeGroup", "Group", NODE_CLASS_GROUP, NODE_OPTIONS | NODE_CONST_OUTPUT);
 	ntype.type = NODE_GROUP;
 	ntype.poll = cmp_node_poll_default;
+	ntype.poll_instance = node_group_poll_instance;
 	ntype.update_internal_links = node_update_internal_links_default;
 	ntype.ext.srna = RNA_struct_find("CompositorNodeGroup");
 	BLI_assert(ntype.ext.srna != NULL);