From: Ramsay Jones Date: Tue, 04 Nov 2025 23:49:46 GMT Subject: v2.52.0-rc0 test failure on cygwin Message-ID: Hi Junio, Just a quick heads up: the rc0 build on cygwin has a flaky test, thus: $ tail test-out-2-52-rc0 Test Summary Report ------------------- t0610-reftable-basics.sh (Wstat: 256 (exited 1) Tests: 90 Failed: 1) Failed test: 29 Non-zero exit status: 1 Files=1024, Tests=32232, 2703 wallclock secs (23.38 usr 60.53 sys + 7886.88 cusr 10419.88 csys = 18390.67 CPU) Result: FAIL make[1]: *** [Makefile:78: prove] Error 1 make[1]: Leaving directory '/home/ramsay/git/t' make: *** [Makefile:3327: test] Error 2 $ Initially, while investigating the failure, I was running the test by hand and it didn't fail ... So, I tried a stess test, like so: $ cd t $ ./t0610-reftable-basics.sh --run=29 --stress-limit=10 FAIL 3.1 OK 7.1 OK 19.1 OK 18.1 OK 2.1 OK 6.1 OK 9.1 OK 0.1 OK 21.1 OK 8.1 OK 4.1 OK 10.1 OK 12.1 OK 26.1 OK 29.1 OK 17.1 OK 1.1 OK 23.1 OK 5.1 OK 11.1 OK 27.1 OK 16.1 OK 14.1 OK 30.1 OK 15.1 OK 25.1 OK 31.1 OK 22.1 OK 24.1 OK 20.1 OK 28.1 OK 13.1 Log(s) of failed test run(s): Contents of '/home/ramsay/git/t/test-results/t0610-reftable-basics.stress-3.out': Initialized empty Git repository in /home/ramsay/git/t/trash directory.t0610-reftable-basics.stress-3/.git/ ok 1 # skip pack-refs does not crash with -h (--run) ok 2 # skip init: creates basic reftable structures (--run) ... ok 27 # skip clone: can clone reffiles into reftable repository (--run) ok 28 # skip clone: can clone reftable into reffiles repository (--run) expecting success of 0610.29 'ref transaction: corrupted tables cause failure': test_when_finished "rm -rf repo" && git init repo && ( cd repo && test_commit file1 && for f in .git/reftable/*.ref do : >"$f" || return 1 done && test_must_fail git update-ref refs/heads/main HEAD ) ++ test_when_finished 'rm -rf repo' ++ test 0 = 0 ++ test_cleanup='{ rm -rf repo } && (exit "$eval_ret"); eval_ret=$?; :' ++ git init repo Initialized empty Git repository in /home/ramsay/git/t/trash directory.t0610-reftable-basics.stress-3/repo/.git/ ++ cd repo ++ test_commit file1 ++ local notick= ++ local echo=echo ++ local append= ++ local author= ++ local signoff= ++ local indir= ++ local tag=light ++ test 1 '!=' 0 ++ case "$1" in ++ break ++ indir= ++ local file=file1.t ++ test -n '' ++ echo file1 ++ git add -- file1.t ++ test -z '' ++ test_tick ++ test -z '' ++ test_tick=1112911993 ++ GIT_COMMITTER_DATE='1112911993 -0700' ++ GIT_AUTHOR_DATE='1112911993 -0700' ++ export GIT_COMMITTER_DATE GIT_AUTHOR_DATE ++ git commit -m file1 [main (root-commit) 69af168] file1 Author: A U Thor 1 file changed, 1 insertion(+) create mode 100644 file1.t ++ case "$tag" in ++ git tag file1 ++ for f in .git/reftable/*.ref ++ : ./test-lib.sh: line 1017: .git/reftable/0x000000000001-0x000000000002-3b7f1804.ref: Permission denied error: last command exited with $?=1 not ok 29 - ref transaction: corrupted tables cause failure # # test_when_finished "rm -rf repo" && # git init repo && # ( # cd repo && # test_commit file1 && # for f in .git/reftable/*.ref # do # : >"$f" || return 1 # done && # test_must_fail git update-ref refs/heads/main HEAD # ) # 1..29 $ Note the 'Permission denied' error when attempting to corrupt (empty) the '*.ref' tables. (Also, this shows 1 error in 32 parallel attempts). However, the 'trash' directory shows that the file permissions are set such that I should be able to corrupt them: $ cd trash\ directory.t0610-reftable-basics.stress-failed/ $ cd repo $ ls -l .git/reftable total 3.0K -rw-r--r-- 1 ramsay None 296 Nov 4 17:56 0x000000000001-0x000000000002-3b7f1804.ref -rw-r--r-- 1 ramsay None 139 Nov 4 17:56 0x000000000003-0x000000000003-66444a41.ref -rw-r--r-- 1 ramsay None 86 Nov 4 17:56 tables.list $ Indeed, I can do just that: $ : >.git/reftable/0x000000000001-0x000000000002-3b7f1804.ref $ ls -l .git/reftable total 2.0K -rw-r--r-- 1 ramsay None 0 Nov 4 18:54 0x000000000001-0x000000000002-3b7f1804.ref -rw-r--r-- 1 ramsay None 139 Nov 4 17:56 0x000000000003-0x000000000003-66444a41.ref -rw-r--r-- 1 ramsay None 86 Nov 4 17:56 tables.list $ git update-ref refs/heads/main HEAD fatal: HEAD: not a valid SHA1 $ So, this appears to be a timing issue (a bit difficult to think how it actually could be, but ...), so maybe try: $ cd ../.. $ vim t0610-reftable-basics.sh $ git diff diff --git a/t/t0610-reftable-basics.sh b/t/t0610-reftable-basics.sh index 3ea5d51532..4fc5cbca99 100755 --- a/t/t0610-reftable-basics.sh +++ b/t/t0610-reftable-basics.sh @@ -205,6 +205,7 @@ test_expect_success 'ref transaction: corrupted tables cause failure' ' ( cd repo && test_commit file1 && + sleep 1 && for f in .git/reftable/*.ref do : >"$f" || return 1 $ ./t0610-reftable-basics.sh --run=29 --stress-limit=10 OK 0.1 OK 13.1 OK 4.1 OK 1.1 OK 2.1 OK 3.1 OK 10.1 OK 8.1 OK 26.1 OK 21.1 OK 7.1 OK 19.1 OK 9.1 OK 5.1 OK 14.1 OK 22.1 OK 11.1 OK 27.1 OK 17.1 OK 29.1 OK 6.1 OK 30.1 OK 15.1 OK 23.1 OK 12.1 OK 24.1 OK 25.1 OK 16.1 OK 18.1 OK 28.1 OK 31.1 OK 20.1 OK 0.2 OK 13.2 OK 4.2 OK 10.2 OK 2.2 OK 3.2 OK 1.2 OK 22.2 OK 8.2 OK 21.2 OK 19.2 OK 5.2 OK 9.2 OK 7.2 OK 26.2 OK 11.2 OK 14.2 OK 25.2 OK 28.2 OK 15.2 OK 17.2 OK 27.2 OK 6.2 OK 18.2 OK 30.2 OK 31.2 OK 29.2 OK 20.2 OK 16.2 OK 12.2 OK 23.2 OK 24.2 OK 13.3 OK 4.3 OK 0.3 OK 3.3 OK 10.3 OK 2.3 OK 1.3 OK 8.3 OK 22.3 OK 19.3 OK 5.3 OK 14.3 OK 26.3 OK 7.3 OK 25.3 OK 15.3 OK 28.3 OK 21.3 OK 9.3 OK 11.3 OK 12.3 OK 23.3 OK 16.3 OK 17.3 OK 18.3 OK 29.3 OK 6.3 OK 30.3 OK 27.3 OK 24.3 OK 31.3 OK 20.3 $ [I hit ctrl-c here] So, not really an answer, but I have noted several times over the years that cygwin seems to delay setting some file attributes until after the process has exited ... [yeah, I don't see how either! ;) ]. I noted the above last night and, unfortunately, I haven't had any time to look into this tonight. (hopefully tomorrow). [I haven't tried bisecting because, well ... flaky test! ;) ] ATB, Ramsay Jones