CGM test crashes

The CGM session has a problem in the SessionAddTessellation() function. Around line 911 of smtk/bridge/cgm/Session.cxx, the function calls

   smtk::mesh::CollectionPtr collection =
     entityref.owningSession().manager()->meshes
     collection(entityref.owningModel().entity()

which is crashing the cgmSolidModeling test for me. This appears to happen because the model is only partially valid when the tessellation is added; owningSession() returns an invalid result because the entity's owning face and model haven't been set yet, so the owning session cannot be determined.