Re: Bugreport on Ubuntu LTS: not ok - 2 Objects creation does not break ACLs with restrictive umask

Stefan Beller [off-list ref] writes:

I tried debugging into it:
In git/t/t1304-default-acl.sh there is:
check_perms_and_acl () {
    test -r "$1" &&
    getfacl "$1" > actual &&
    grep -q "user:root:rwx" actual &&
    grep -q "user:${LOGNAME}:rwx" actual &&
    egrep "mask::?r--" actual > /dev/null 2>&1 &&
    grep -q "group::---" actual || false
}

but when I do all the commands as in the test2:
test_expect_success SETFACL 'Objects creation does not break ACLs with
restrictive umask' '
    # SHA1 for empty blob
    check_perms_and_acl .git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391
'
Now I run the second line in check_perms_and_acl ()  with
.git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391
there is

getfacl .git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391
# file: .git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391
# owner: sb
# group: sb
user::r--
user:root:rwx			#effective:---
user:sb:rwx			#effective:---
group::---
mask::---
other::---

This command seem to fail 'egrep "mask::?r--" actual' as there is
mask::---
but expected is
mask::r--

That's my understanding of the test case so far.

Hmph.  Running the test manually does not seem to fail for me and
gives the "r--" mask.

I am lost.  Matthieu, you introduced this as a failing test with
7aba618 (Add a testcase for ACL with restrictive umask.,
2010-02-22), as part of the series leading to 5256b00 (Use
git_mkstemp_mode instead of plain mkstemp to create object files,
2010-02-22).  Any ideas (other than "Your filesystem is broken",
that is)?  As far as I can tell, with 'mask::---', these specific
users who are given permissions to read from the objects wouldn't be
able to read from them, so...