Primarily, this test fails in the thread_sanitizer job, along with a bunch of others (#22520). However, it has failed once (in my data) in a "normal" validate job: https://gitlab.haskell.org/ghc/ghc/-/jobs/1322105, aarch64-linux-deb10-validate. Example: ``` =====> 1300 of 9257 [0, 0, 0] =====> 1400 of 9257 [0, 0, 0] Compile failed (exit code 139) errors were: [ 1 of 13] Compiling A[boot] ( A.hs-boot, A.o-boot ) Segmentation fault (core dumped) *** unexpected failure for T20030_test1j(normal) =====> 1500 of 9257 [0, 1, 0] ``` All cases since last April: ``` create temp table jt as select rowid from job_trace where trace match '"unexpected failure for T20030_test1j"' ; create temp table jj as select job_id, json ->> '$.name' like '%thread_sanitizer' is_thread_sanitizer from job ; select json ->> '$.created_at', jj.job_id from jj left join jt on jj.job_id = jt.rowid left join job on jj.job_id = job.job_id where is_thread_sanitizer = 0 and jt.rowid is not null order by is_thread_sanitizer --------- json ->> '$.created_at' job_id ------------------------ ------- 2022-06-16T10:43:55.428Z 1084081 2022-06-16T13:43:27.707Z 1084214 2022-09-28T12:30:20.615Z 1184977 2022-09-28T12:30:21.831Z 1184980 2022-09-28T12:30:21.908Z 1184982 2022-09-28T12:30:22.697Z 1185002 2023-01-17T19:45:40.552Z 1310940 2023-01-25T13:32:27.839Z 1322105 ``` * https://gitlab.haskell.org/ghc/ghc/-/jobs/1084081 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1084214 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1184977 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1184980 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1184982 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1185002 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1310940 * https://gitlab.haskell.org/ghc/ghc/-/jobs/1322105