macOS: some test cases fail, how to debug?

[barracuda156]

Certain test cases fail, but there is no meaningful output to debug those. How do I get detailed log for all failures?

Specifically, these case failed: 6.2, 7.1, 8.2, 9.4, 10.3, 10.5.x, 10.7. Few test cases were skipped.
Weirdly, 8.1 failed or succeeded non-deterministically (at least I got a couple of successes and failures when re-running).

P. S. Somewhat related: #113

[barracuda156]

P. S. Possibly some failures are due to picking old system versions of some external binaries. I will try to make sure that modern MacPorts’ versions are used and see if that helps with failing cases.

Update. Yeah, that is definitely the case, some failures are superficial, and test cases pass with modern dependencies. I will update on what still fails.