[Bf-blender-cvs] [c9290d23ca5] blender-v3.1-release: Fix T96494: Array modifier with caps crash on curve objects

[Hans Goudey]

Commit: c9290d23ca52a1d5986c21b3f947b7dd2e2de4b1
Author: Hans Goudey
Date:   Mon Mar 21 14:44:39 2022 -0500
Branches: blender-v3.1-release
https://developer.blender.org/rBc9290d23ca52a1d5986c21b3f947b7dd2e2de4b1

Fix T96494: Array modifier with caps crash on curve objects

Since 3b6ee8cee7080af20, a list of vertex groups cannot be retrieved
from curve objects for merging because curve objects do not support
vertex groups. Previously the empty list on the object was returned.
Only mesh objects are supported for the caps.

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

M	source/blender/modifiers/intern/MOD_array.c

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

diff --git a/source/blender/modifiers/intern/MOD_array.c b/source/blender/modifiers/intern/MOD_array.c
index de129888060..df02cc33507 100644
--- a/source/blender/modifiers/intern/MOD_array.c
+++ b/source/blender/modifiers/intern/MOD_array.c
@@ -412,8 +412,10 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
 
   Object *start_cap_ob = amd->start_cap;
   if (start_cap_ob && start_cap_ob != ctx->object) {
-    vgroup_start_cap_remap = BKE_object_defgroup_index_map_create(
-        start_cap_ob, ctx->object, &vgroup_start_cap_remap_len);
+    if (start_cap_ob->type == OB_MESH && ctx->object->type == OB_MESH) {
+      vgroup_start_cap_remap = BKE_object_defgroup_index_map_create(
+          start_cap_ob, ctx->object, &vgroup_start_cap_remap_len);
+    }
 
     start_cap_mesh = BKE_modifier_get_evaluated_mesh_from_evaluated_object(start_cap_ob, false);
     if (start_cap_mesh) {
@@ -425,8 +427,10 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
   }
   Object *end_cap_ob = amd->end_cap;
   if (end_cap_ob && end_cap_ob != ctx->object) {
-    vgroup_end_cap_remap = BKE_object_defgroup_index_map_create(
-        end_cap_ob, ctx->object, &vgroup_end_cap_remap_len);
+    if (start_cap_ob->type == OB_MESH && ctx->object->type == OB_MESH) {
+      vgroup_end_cap_remap = BKE_object_defgroup_index_map_create(
+          end_cap_ob, ctx->object, &vgroup_end_cap_remap_len);
+    }
 
     end_cap_mesh = BKE_modifier_get_evaluated_mesh_from_evaluated_object(end_cap_ob, false);
     if (end_cap_mesh) {