Darwin gitlab-runner occasionally receives SIGQUIT and dies

Seems to be happening about once a month starting in August 2022. It usually happens when the runner is uploading artifacts at the end of a run. Once, though, it happened while uploading the cache at the end of a run.

I guess this is probably a bug in gitlab-runner. My plan is just to treat it as spurious and retry such jobs.

I am opening this ticket just so we have a discussion spot for this topic, should it ever need discussion.

NB gitlab-runner apparently uses SIGQUIT as a signal for a "graceful shutdown", which makes me sad. That's what SIGTERM is already for...?

json->>'web_url'	date(json->>'created_at')	json->>'runner.description'
https://gitlab.haskell.org/ghc/ghc/-/jobs/1397503	2023-03-08	aarch64-darwin-1_Mini18-Beta_f87b8a204711
https://gitlab.haskell.org/ghc/ghc/-/jobs/1393354	2023-03-03	aarch64-darwin-2_aarch64-darwin-2_a1a3a7139d97
https://gitlab.haskell.org/ghc/ghc/-/jobs/1381660	2023-02-18	aarch64-darwin-1_Mini18-Beta_f87b8a204711
https://gitlab.haskell.org/ghc/ghc/-/jobs/1348404	2023-01-31	m1-delta_Mini18-Delta_f87b8a204711
https://gitlab.haskell.org/ghc/ghc/-/jobs/1303051	2023-01-12	aarch64-darwin-1_Mini18-Epsilon_004e0928d81c
https://gitlab.haskell.org/ghc/ghc/-/jobs/1275162	2022-12-22	aarch64-darwin-1_Mini18-Epsilon_004e0928d81c
https://gitlab.haskell.org/ghc/ghc/-/jobs/1261884	2022-12-14	aarch64-darwin-1_Mini18-Beta_f87b8a204711
https://gitlab.haskell.org/ghc/ghc/-/jobs/1175376	2022-09-19	aarch64-darwin-1_Mini18-Epsilon_004e0928d81c
https://gitlab.haskell.org/ghc/ghc/-/jobs/1132694	2022-08-06	aarch64-darwin-1_Mini18-Beta_f87b8a204711