ID 375798 - Crash when using an edge split

Problem summary
Edge Split feature is crashing Modo

Customer reported version
modo.12.2v1

Customer reported platform
windows10

Steps to reproduce

1) Open Modo and create a procedural Cube 

2) Create another Mesh and create a curve that is overlapping with the object

3) Right click on the Cube mesh and go to Add Mesh Operation>Curve Slice and choose the curve, created in step 2

4) Right click on the Cube mesh and go to Add Mesh Operation>Edge Split

5) Go to the Edge Split properties and increase the Gap value

Result: Modo crashes 

Workaround
Unknown. 

Reproduced by support

This bug has been reproduced in:
12.2v1 - Windows 10 - OSX 10.13.5 - CentOS 7
12.1v2 - Windows 10
12.1v1 - Windows 10 - OSX 10.13.5 - CentOS 7

Earliest version tested
12.1v1 - Windows 10, OSX 10.13.5 - This feature (edge split operator) did not exist before this version

Expected behaviour
Modo should not crash when a procedural object is created and the gap value on an "edge split" operator is adjusted.

Actual behaviour
Modo crashes immediately when adjusting the "gap value" on an "edge split" operator.