When running spec for boxgrinder-build, I noticed some failures despite CI being green. When re-run with no changes, there were sometimes a different number of failures.
This might be because undefined behaviour/ordering has been relied upon in a specific version of one of the rspec components, or there is a general problem. Either way it needs investigating and fixing.
Example gist (from HEAD as of now):
Reproduced on my local machine, and a fresh EC2 EBS instance.