ID 488803 - Exporting morphs as glTF causes a crash.

Problem summary
Exporting morph animation as glTF causes a crash.

Customer reported version
modo.15.1v1

Customer reported platform
windows10

Steps to reproduce

1) Launch Modo.

2) Open customer provided scene.

3) Click the plus next to the Cube mesh item in the Item List to expand the item.

4) Remove the two skeleton joints or Normalizing Folder.

5) Go to File > Export As... 

6) Export as glTF.

7) Observe that Modo crashes.

Expected behaviour
Modo should not crash.

Actual behaviour
Crash occurs.

Workaround
Unknown. 

Reproduced by support
This bug has been reproduced in:
15.1v2 - Windows 10
15.0v1 - Windows 10
14.2v1 - Windows 10
14.1v1 - Windows 10
14.0v1 - Windows 10
13.0v1 - Windows 10
12.2v2 - Windows 10


Earliest version tested
Modo 12.2v2 - This issue appears to be in all versions of the product