[W.I.P.] Curve Tools plugin

[tkbd]

Thank you micheus
OK, I'm going to update the plug-in

But...I found another crash at Curve PutOn.
It happened when delete a object for already targeted of a curve.

How to recreate it?

1. Create a cylinder
   
2. Create a curve (In Curve Tool window)
   
3. Make these to one, do "Body > Put on" command.(In Curve Tool window)
   
4. Delete the cylinder (In Geometry window)
   
5. Return to Curve Tool window, move the curve segment.
   
6. Wings3D crash with MacOS.
   

Here is the crash log.

Code:

Dump written 2021-5-29_15-46
Version: 2.2.7
Window: {plugin,{curves,geom}}
Reason: function_clause

Short stack trace:
[{gb_trees,get_1,2,[{file,"gb_trees.erl"},{line,244}]},
{curve_obj_build,remap_we_vertices,2,
                  [{file,"curve_obj_build.erl"},{line,333}]},
{curve_obj_build,update_object_0,2,
                  [{file,"curve_obj_build.erl"},{line,1551}]},
{curve_obj_build,update_object,2,[{file,"curve_obj_build.erl"},{line,1544}]},
{curve_obj_build,'-update_objects/3-fun-0-',5,
                  [{file,"curve_obj_build.erl"},{line,1530}]},
{lists,foldl,3,[{file,"lists.erl"},{line,1267}]},
{curve_drag,'-update_object/4-fun-1-',4,
             [{file,"curve_drag.erl"},{line,1063}]},
{lists,foldl,3,[{file,"lists.erl"},{line,1267}]},
{curve_drag,update_object,4,[{file,"curve_drag.erl"},{line,1011}]},
{curve_drag,motion_update,2,[{file,"curve_drag.erl"},{line,1006}]},
{curve_drag,handle_drag_event_2,2,[{file,"curve_drag.erl"},{line,482}]},
{wings_wm,handle_event,3,[{file,"wings_wm.erl"},{line,1031}]},
{wings_wm,send_event,2,[{file,"wings_wm.erl"},{line,998}]},
{wings_wm,do_dispatch,2,[{file,"wings_wm.erl"},{line,890}]},
{wings_wm,get_and_dispatch,0,[{file,"wings_wm.erl"},{line,685}]},
{wings,init_part2,3,[{file,"wings.erl"},{line,108}]},
{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,226}]}]

Long stack trace:
[{gb_trees,get_1,[2,nil],[{file,"gb_trees.erl"},{line,244}]},
{curve_obj_build,remap_we_vertices,2,
                  [{file,"curve_obj_build.erl"},{line,333}]},
{curve_obj_build,update_object_0,2,
                  [{file,"curve_obj_build.erl"},{line,1551}]},
{curve_obj_build,update_object,2,[{file,"curve_obj_build.erl"},{line,1544}]},
{curve_obj_build,'-update_objects/3-fun-0-',5,
                  [{file,"curve_obj_build.erl"},{line,1530}]},
{lists,foldl,3,[{file,"lists.erl"},{line,1267}]},
{curve_drag,'-update_object/4-fun-1-',4,
             [{file,"curve_drag.erl"},{line,1063}]},
{lists,foldl,3,[{file,"lists.erl"},{line,1267}]},
{curve_drag,update_object,4,[{file,"curve_drag.erl"},{line,1011}]},
{curve_drag,motion_update,2,[{file,"curve_drag.erl"},{line,1006}]},
{curve_drag,handle_drag_event_2,2,[{file,"curve_drag.erl"},{line,482}]},
{wings_wm,handle_event,3,[{file,"wings_wm.erl"},{line,1031}]},
{wings_wm,send_event,2,[{file,"wings_wm.erl"},{line,998}]},
{wings_wm,do_dispatch,2,[{file,"wings_wm.erl"},{line,890}]},
{wings_wm,get_and_dispatch,0,[{file,"wings_wm.erl"},{line,685}]},
{wings,init_part2,3,[{file,"wings.erl"},{line,108}]},
{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,226}]}]

OS: macOS Mojave Version 10.14.6 (Build 18G9028)
GPU: Intel Inc. | Intel Iris OpenGL Engine