It seems like the PR test jobs for macOS CI have been plagued by connection timeouts and filesystem issues for the past ~day or so. Did some sort of configuration change go into effect yesterday?
This is an issue that is across all the CI system (seem it in swift-algorithms as well). Pavel mentioned in a comment yesterday that is a known issue and is being already investigated =]
Awesome, just wanted to make sure it had been surfaced already :)
We are actively looking into the issue, sorry for the inconvenience.
Thank you for the information @mishal_shah!