Unity 2018.3 Mac crashes on build, no error

Whenever I try to start the build process, I select the path, and Unity immediately freezes. There is no warning or error. Eventually it just silently closes the editor completely, and nothing has been exported.

I tried using an empty scene as the only scene selected for export, that too has failed.

I am running on a 2017 Macbook pro, i7, 16Gb DDR

Has anyone encountered this behaviour?

Follow-up here: the issue was with a 3rd party asset that was messing up the build pipe-line.