When trying to open this process definitions:
https://github.com/DuncanDoyle/rhpam7-client-onboarding-enrichment-repo/blob/emf-error/src/main/resources/com/myteam/client_onboarding_enrichment/EnrichmentProcess.bpmn

with the new designer, the designer seems to crash and the workbench shows the EMF Error as can be seen in the attached screenshot.

Note that this process can not be designed with new editor. But it can be broken by 3-d party editors, old BPMN Designer or any other way like, for example, XML editor.