bug#28966: git fails test suite

[Ricardo Wurmus]

As of 62d48234e20c732ebefc1b4deb425f590b4241ca git fails at least one of
its tests on my servers:

--8<---------------cut here---------------start------------->8---
not ok 185 - --contains and --no-contains work in a deep repo
#
#               >expect &&
#               i=1 &&
#               while test $i -lt 8000
#               do
#                       echo "commit refs/heads/master
#       committer A U Thor <address@hidden> $((1000000000 + $i * 100)) +0200
#       data <<EOF
#       commit #$i
#       EOF"
#                       test $i = 1 && echo "from refs/heads/master^0"
#                       i=$(($i + 1))
#               done | git fast-import &&
#               git checkout master &&
#               git tag far-far-away HEAD^ &&
#               run_with_limited_stack git tag --contains HEAD >actual &&
#               test_cmp expect actual &&
#               run_with_limited_stack git tag --no-contains HEAD >actual &&
#               test_line_count "-gt" 10 actual
#
--8<---------------cut here---------------end--------------->8---

The server has 1.5TB RAM and 192 cores.  I’ve tried to build git about 5
times; some of these times I used “--cores=1” to force a sequential
build, but the tests would still fail.

-- Ricardo