Here's one: https://gitlab.haskell.org/rae/ghc/-/jobs/173464  I don't know if you can get more information...

On Oct 9, 2019, at 1:21 PM, Ben Gamari <ben@smart-cactus.org> wrote:

Richard Eisenberg <rae@richarde.dev> writes:

Hi devs,

validate-x86_64-darwin seems to be failing. I've restarted it when I
came across the failure, but several small patches last night tripped
on this.

Which jobs in particular failed? I looked through the recent job list
[1] but all Darwin jobs in the last 10 pages of jobs were either skipped
(due to another job failing) or passing.

Cheers,

- Ben

[1] https://gitlab.haskell.org/ghc/ghc/-/jobs