[PATCH v3 00/19] leak fixes: various simple leak fixes

A hopefully final version of this collection of simple leak fixes. See https://lore.kernel.org/git/cover-v2-00.20-00000000000-20221230T020341Z-avarab@gmail.com/ for v2.

Changes since v2:

 * Updated reference to function name in a commit subject, spotted by
   René.

 * Dropped a patch that didn't fix a leak, but just did a post-cleanup
   of an already fixed leak.

Ævar Arnfjörð Bjarmason (19):
  tests: mark tests as passing with SANITIZE=leak
  bundle.c: don't leak the "args" in the "struct child_process"
  commit-graph: use free_commit_graph() instead of UNLEAK()
  clone: use free() instead of UNLEAK()
  various: add missing clear_pathspec(), fix leaks
  name-rev: don't xstrdup() an already dup'd string
  repack: fix leaks on error with "goto cleanup"
  worktree: fix a trivial leak in prune_worktrees()
  http-backend.c: fix "dir" and "cmd_arg" leaks in cmd_main()
  http-backend.c: fix cmd_main() memory leak, refactor reg{exec,free}()
  commit-graph: fix a parse_options_concat() leak
  show-branch: free() allocated "head" before return
  builtin/merge.c: always free "struct strbuf msg"
  builtin/merge.c: free "&buf" on "Your local changes..." error
  object-file.c: release the "tag" in check_tag()
  grep.c: refactor free_grep_patterns()
  grep API: plug memory leaks by freeing "header_list"
  receive-pack: free() the "ref_name" in "struct command"
  push: free_refs() the "local_refs" in set_refspecs()

 archive.c                                  |  1 +
 builtin/clean.c                            |  1 +
 builtin/clone.c                            |  5 +++--
 builtin/commit-graph.c                     | 10 ++++++----
 builtin/merge.c                            | 14 ++++++-------
 builtin/name-rev.c                         | 23 ++++++++++------------
 builtin/push.c                             |  1 +
 builtin/receive-pack.c                     | 10 ++++++++++
 builtin/repack.c                           | 13 ++++++------
 builtin/reset.c                            | 11 ++++++++---
 builtin/show-branch.c                      |  1 +
 builtin/stash.c                            |  7 +++++--
 builtin/worktree.c                         |  6 +++---
 bundle.c                                   |  6 ++++--
 grep.c                                     | 15 +++++++++-----
 http-backend.c                             |  9 +++++++--
 object-file.c                              |  1 +
 t/t0023-crlf-am.sh                         |  1 +
 t/t1301-shared-repo.sh                     |  1 +
 t/t1302-repo-version.sh                    |  1 +
 t/t1304-default-acl.sh                     |  1 +
 t/t1408-packed-refs.sh                     |  1 +
 t/t1410-reflog.sh                          |  1 +
 t/t1416-ref-transaction-hooks.sh           |  1 +
 t/t2401-worktree-prune.sh                  |  1 +
 t/t2406-worktree-repair.sh                 |  1 +
 t/t3210-pack-refs.sh                       |  1 +
 t/t3800-mktag.sh                           |  1 +
 t/t4152-am-subjects.sh                     |  2 ++
 t/t4254-am-corrupt.sh                      |  2 ++
 t/t4256-am-format-flowed.sh                |  1 +
 t/t4257-am-interactive.sh                  |  2 ++
 t/t5001-archive-attr.sh                    |  1 +
 t/t5004-archive-corner-cases.sh            |  2 ++
 t/t5302-pack-index.sh                      |  2 ++
 t/t5317-pack-objects-filter-objects.sh     |  1 +
 t/t5330-no-lazy-fetch-with-commit-graph.sh |  1 +
 t/t5403-post-checkout-hook.sh              |  1 +
 t/t5405-send-pack-rewind.sh                |  1 +
 t/t5406-remote-rejects.sh                  |  1 +
 t/t5502-quickfetch.sh                      |  1 +
 t/t5504-fetch-receive-strict.sh            |  1 +
 t/t5507-remote-environment.sh              |  2 ++
 t/t5522-pull-symlink.sh                    |  1 +
 t/t5523-push-upstream.sh                   |  1 +
 t/t5527-fetch-odd-refs.sh                  |  1 +
 t/t5529-push-errors.sh                     |  2 ++
 t/t5546-receive-limits.sh                  |  2 ++
 t/t5547-push-quarantine.sh                 |  2 ++
 t/t5604-clone-reference.sh                 |  1 +
 t/t5606-clone-options.sh                   |  1 +
 t/t5613-info-alternate.sh                  |  2 ++
 t/t5705-session-id-in-capabilities.sh      |  1 +
 t/t5810-proto-disable-local.sh             |  2 ++
 t/t5813-proto-disable-ssh.sh               |  2 ++
 t/t6011-rev-list-with-bad-commit.sh        |  1 +
 t/t6014-rev-list-all.sh                    |  1 +
 t/t6021-rev-list-exclude-hidden.sh         |  1 +
 t/t6439-merge-co-error-msgs.sh             |  1 +
 t/t7105-reset-patch.sh                     |  2 ++
 t/t7106-reset-unborn-branch.sh             |  2 ++
 t/t7107-reset-pathspec-file.sh             |  1 +
 t/t7301-clean-interactive.sh               |  1 +
 t/t7403-submodule-sync.sh                  |  1 +
 t/t7409-submodule-detached-work-tree.sh    |  1 +
 t/t7416-submodule-dash-url.sh              |  2 ++
 t/t7450-bad-git-dotfiles.sh                |  2 ++
 t/t7701-repack-unpack-unreachable.sh       |  1 +
 68 files changed, 151 insertions(+), 50 deletions(-)

Range-diff against v2:
 1:  3de29c6d75f =  1:  f5b67f44e2d tests: mark tests as passing with SANITIZE=leak
 2:  5036712391d =  2:  88c6b66be3c bundle.c: don't leak the "args" in the "struct child_process"
 3:  a840a1cb330 !  3:  8cc8060cd92 commit-graph: use free() instead of UNLEAK()
    @@ Metadata
     Author: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
     
      ## Commit message ##
    -    commit-graph: use free() instead of UNLEAK()
    +    commit-graph: use free_commit_graph() instead of UNLEAK()
     
         In 0bfb48e6723 (builtin/commit-graph.c: UNLEAK variables, 2018-10-03)
         this was made to UNLEAK(), but we can just as easily invoke the
 4:  c05620cef49 =  4:  765d5cbcf81 clone: use free() instead of UNLEAK()
 5:  62af6557760 =  5:  5087fb73286 various: add missing clear_pathspec(), fix leaks
 6:  7cea3da9fae =  6:  39cb8aefb58 name-rev: don't xstrdup() an already dup'd string
 7:  b5978d75c6a =  7:  a3f1e800127 repack: fix leaks on error with "goto cleanup"
 8:  468615570f4 =  8:  f918a6f2adc worktree: fix a trivial leak in prune_worktrees()
 9:  8c5c964d872 =  9:  56204806dfd http-backend.c: fix "dir" and "cmd_arg" leaks in cmd_main()
10:  fd34c4817f4 = 10:  5355e0fc60b http-backend.c: fix cmd_main() memory leak, refactor reg{exec,free}()
11:  f7005f32cc0 = 11:  dfb52dbd1c4 commit-graph: fix a parse_options_concat() leak
12:  bf0e9bc5fa6 = 12:  e44e74dcc58 show-branch: free() allocated "head" before return
13:  b157092e8d0 = 13:  6d99fdcc44e builtin/merge.c: always free "struct strbuf msg"
14:  bdd2bc9a956 = 14:  a3bf3045597 builtin/merge.c: free "&buf" on "Your local changes..." error
15:  d5210017cab <  -:  ----------- connected.c: free(new_pack) in check_connected()
16:  2016b4ddd0b = 15:  7c70bbdebc8 object-file.c: release the "tag" in check_tag()
17:  fa2e8a7d297 = 16:  17537e1393e grep.c: refactor free_grep_patterns()
18:  3fcf7054708 = 17:  e4bd46a343e grep API: plug memory leaks by freeing "header_list"
19:  fa5d657312f = 18:  3e4b12cb623 receive-pack: free() the "ref_name" in "struct command"
20:  e5af27134df = 19:  d51ed239a8a push: free_refs() the "local_refs" in set_refspecs()