Connector tool - crash

Summary:

crash in master

Steps to reproduce:

• open Inkscape
• draw 2 rectangles
• take connection tool
• **click and drag ** from rectangle 1 to rectangle 2 and tel go
• crash

What happened?

-no crush

What should have happened?

...

Sample attachments:

Version Info:

- Inkscape Version: ... <!-- (run inkscape -V or copy from Help → About Inkscape, top right) -->
- Operating System:win 
- Operating System version: -1.1-dev_2020-09-02_156e408-x64