Molecule plot of `multi_curv3d.silo` crashes VisIt with no error message

[JustinPrivitera]

bin/visit -o testdata/silo_hdf5_test_data/multi_curv3d.silo

Then try to make a Molecule plot of d.

VisIt crashes; the debug logs don't seem to contain any useful information.

Should you be able to make a molecule plot of d? Probably not. But VisIt shouldn't crash like that. It should tell you what went wrong.

This is on 3.4RC as of 01/16/24.

[cyrush]

We should find out what is wrong and issue error instead of crashing