Git 2.30.0 and failed self tests

Hi Everyone,

I'm seeing a failed self test with 2.30.0 on Alpine Linux 3.10,
x86_64. Alpine Linux uses Musl and BusyBox, so things may be a bit
sideways because of them.

*** t4129-apply-samemode.sh ***
ok 1 - setup
ok 2 - same mode (no index)
ok 3 - same mode (with index)
ok 4 - same mode (index only)
ok 5 - mode update (no index)
ok 6 - mode update (with index)
ok 7 - mode update (index only)
ok 8 - empty mode is rejected
ok 9 - bogus mode is rejected
not ok 10 - do not use core.sharedRepository for working tree files
#
#        git reset --hard &&
#        test_config core.sharedRepository 0666 &&
#        (
#            # Remove a default ACL if possible.
#            (setfacl -k newdir 2>/dev/null || true) &&
#            umask 0077 &&
#
#            # Test both files (f1) and leading dirs (d)
#            mkdir d &&
#            touch f1 d/f2 &&
#            git add f1 d/f2 &&
#            git diff --staged >patch-f1-and-f2.txt &&
#
#            rm -rf d f1 &&
#            git apply patch-f1-and-f2.txt &&
#
#            echo "-rw-------" >f1_mode.expected &&
#            echo "drwx------" >d_mode.expected &&
#            test_modebits f1 >f1_mode.actual &&
#            test_modebits d >d_mode.actual &&
#            test_cmp f1_mode.expected f1_mode.actual &&
#            test_cmp d_mode.expected d_mode.actual
#        )
#
# failed 1 among 10 test(s)
1..10
make[2]: *** [Makefile:57: t4129-apply-samemode.sh] Error 1

I don't see a log file to offer for this one:

    $ find . -name '*.log'
    ./config.log

Jeff