What's pybeam-failed (in rpmlint)?

When I was checking the build log of rabbitmq-server, I noticed that there were some errors saying "E: pybeam-failed", but I couldn't find related documentations about the error. I would like to ask the meaning of pybeam-failed, and what problem will it cause? I think it's related to python packaging, so I didn't send to opensuse-packaging mailing list. Please correct me if I was wrong. Thanks in advance.