Failing tests due to changes in compress record in EPICS base 7.0.8
In EPICS base 7.0.8 some changes to the compress record were made, see https://github.com/epics-base/epics-base/pull/252. This was done in order to allow for compression of partially filled buffers as per a request by a user.
Unfortunately, due to a lack of tests, this change broke the compress record in the case that you are compressing N samples into M samples (with M > 1). A proposed fix is here: https://github.com/epics-base/epics-base/pull/468 but it has not yet been merged into EPICS base and has certainly not been released yet.