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, 6 insertions, 0 deletions

diff --git a/source/blender/editors/interface/interface_ops.c b/source/blender/editors/interface/interface_ops.c
index 3a5ba9acaac..865aed01aa1 100644
--- a/source/blender/editors/interface/interface_ops.c
+++ b/source/blender/editors/interface/interface_ops.c
@@ -2339,6 +2339,9 @@ static bool ui_view_drop_poll(bContext *C)
 {
   const wmWindow *win = CTX_wm_window(C);
   const ARegion *region = CTX_wm_region(C);
+  if (region == NULL) {
+    return false;
+  }
   const uiViewItemHandle *hovered_item = UI_region_views_find_item_at(region, win->eventstate->xy);
 
   return hovered_item != NULL;
@@ -2386,6 +2389,9 @@ static void UI_OT_view_drop(wmOperatorType *ot)
 static bool ui_view_item_rename_poll(bContext *C)
 {
   const ARegion *region = CTX_wm_region(C);
+  if (region == NULL) {
+    return false;
+  }
   const uiViewItemHandle *active_item = UI_region_views_find_active_item(region);
   return active_item != NULL && UI_view_item_can_rename(active_item);
 }