Fix T88934: Crash with line node count input < 0

Some of the primitive nodes can return null in an error condition.
This is confusing mixed with adding a maderial slot in calling
functions. This is the second crash caused by that confusion. It's
simpler to add the slot right when allocating the mesh, and it will
lend itself better to copy & paste coding in the future.

Differential Revision: https://developer.blender.org/D11530

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_uv_sphere.cc b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_uv_sphere.cc
index 7d340679269..599c59e4a2e 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_uv_sphere.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_mesh_primitive_uv_sphere.cc
@@ -267,6 +267,7 @@ static Mesh *create_uv_sphere_mesh(const float radius, const int segments, const
                                    0,
                                    sphere_corner_total(segments, rings),
                                    sphere_face_total(segments, rings));
+  BKE_id_material_eval_ensure_default_slot(&mesh->id);
   MutableSpan<MVert> verts{mesh->mvert, mesh->totvert};
   MutableSpan<MLoop> loops{mesh->mloop, mesh->totloop};
   MutableSpan<MEdge> edges{mesh->medge, mesh->totedge};
@@ -297,7 +298,6 @@ static void geo_node_mesh_primitive_uv_sphere_exec(GeoNodeExecParams params)
   const float radius = params.extract_input<float>("Radius");
 
   Mesh *mesh = create_uv_sphere_mesh(radius, segments_num, rings_num);
-  BKE_id_material_eval_ensure_default_slot(&mesh->id);
   params.set_output("Geometry", GeometrySet::create_with_mesh(mesh));
 }