• I believe this to be a bug with Open Babel
• This is a feature request

Environment Information

Open Babel version: Open Babel 3.0.0 -- Oct 20 2019 -- 15:03:24
Operating system and version: macOS 10.15.1

Expected Behavior

obrms --a

should fail with the clear message

obrms: invalid option -- a
Unrecognized option: 63

as it happens with obrms -a.

Actual Behavior

A segmentation fault occurs:

obrms --a
[1]    17978 segmentation fault  obrms --a

Steps to Reproduce

See above.