Mysterious gitlab CI failure related to artifacts?

This job https://gitlab.torproject.org/Diziet/arti/-/jobs/367045 failed with what appears to an inability to find the Arti binary. That is supposed to come via artifacts/. I think, from this job https://gitlab.torproject.org/Diziet/arti/-/jobs/367037

That job has some strange messages at the end. "WARNING: artifacts: no matching files". I don't know how that could be possible given that the build succeeded.

We discussed this briefly on #tor-dev without any conclusion. @jnewsome reports "hmm this has happened before too", "at least once before i just chalked it up as weirdness and reran".

This is part of https://gitlab.torproject.org/Diziet/arti/-/pipelines/104832, and I'm going to hit "retry" on the rust-latest and integration tests, because I want this MR CI to pass.

CC @trinity-1686a who has also been helpful in this conversation.