ID 460304 - In specific scenarios using Pack UV causes crashes or the UV islands to disappear.

Problem summary
In specific scenarios using Pack UV causes crashes or the UV islands to disappear.

Customer reported version
modo.14.2v1

Customer reported platform
windows10

Steps to reproduce

1) Download and open the attached scene file.
2) Go to the UV layout and change the selected UV from None to Texture.
3) Select all of the UV islands inside of the UV viewport, select Pack... and then select OK.

4) Notice that all of the UV islands disappear.

Expected behaviour
The UV islands should be packed.

Actual behaviour

The UV islands disappear.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:

14.2v1 - Windows 10

14.1v2 - Windows 10

14.1v1 - Windows 10

14.0v2 - Windows 10

14.0v1 - Windows 10

13.2v1 - Windows 10

13.1v1 - Windows 10  

13.0v1 - Windows 10

12.2v2 - Windows 10 

* - Versions before 14.2v1 result in a crash.

Earliest version tested

12.2v2 - This issue appears to be in all versions of the product