Fix crashes running operators in invalid contexts

Fix for running operators outside of expected contexts.

- UI_OT_view_drop (poll)
- UI_OT_view_item_rename (poll)
- OBJECT_OT_gpencil_modifier_move_to_index
- OBJECT_OT_modifier_move_to_index
- OBJECT_OT_geometry_nodes_input_attribute_toggle
- OBJECT_OT_geometry_node_tree_copy_assign
- OBJECT_OT_shaderfx_remove
- OBJECT_OT_shaderfx_copy
- POSE_OT_relax (& other pose slide operators).

1 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/editors/armature/pose_slide.c b/source/blender/editors/armature/pose_slide.c
index 3e36a0d233a..5e0ef9217c7 100644
--- a/source/blender/editors/armature/pose_slide.c
+++ b/source/blender/editors/armature/pose_slide.c
@@ -286,8 +286,10 @@ static void pose_slide_exit(bContext *C, wmOperator *op)
   ED_slider_destroy(C, pso->slider);
 
   /* Hide Bone Overlay. */
-  View3D *v3d = pso->area->spacedata.first;
-  v3d->overlay.flag = pso->overlay_flag;
+  if (pso->area) {
+    View3D *v3d = pso->area->spacedata.first;
+    v3d->overlay.flag = pso->overlay_flag;
+  }
 
   /* Free the temp pchan links and their data. */
   poseAnim_mapping_free(&pso->pfLinks);