Fix T94495: Split edges node leads to a crash in edit mode

If original indices exist on the input mesh, also copy them to
the BMesh used for the edge split operation so they aren't lost.

Part of D14018

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_edge_split.cc b/source/blender/nodes/geometry/nodes/node_geo_edge_split.cc
index 9376789cf2c..17503c3ea96 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_edge_split.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_edge_split.cc
@@ -39,6 +39,9 @@ static Mesh *mesh_edge_split(const Mesh &mesh, const IndexMask selection)
   BMesh *bm = BM_mesh_create(&allocsize, &bmesh_create_params);
 
   BMeshFromMeshParams bmesh_from_mesh_params{};
+  bmesh_from_mesh_params.cd_mask_extra.vmask = CD_MASK_ORIGINDEX;
+  bmesh_from_mesh_params.cd_mask_extra.emask = CD_MASK_ORIGINDEX;
+  bmesh_from_mesh_params.cd_mask_extra.pmask = CD_MASK_ORIGINDEX;
   BM_mesh_bm_from_me(bm, &mesh, &bmesh_from_mesh_params);
 
   BM_mesh_elem_table_ensure(bm, BM_EDGE);