Merge branch 'ps/leakfixes-part-6'

More leakfixes.

* ps/leakfixes-part-6: (22 commits)
  builtin/repack: fix leaking keep-pack list
  merge-ort: fix two leaks when handling directory rename modifications
  match-trees: fix leaking prefixes in `shift_tree()`
  builtin/fmt-merge-msg: fix leaking buffers
  builtin/grep: fix leaking object context
  builtin/pack-objects: plug leaking list of keep-packs
  builtin/repack: fix leaking line buffer when packing promisors
  negotiator/skipping: fix leaking commit entries
  shallow: fix leaking members of `struct shallow_info`
  shallow: free grafts when unregistering them
  object: clear grafts when clearing parsed object pool
  gpg-interface: fix misdesigned signing key interfaces
  send-pack: fix leaking push cert nonce
  remote: fix leak in reachability check of a remote-tracking ref
  remote: fix leaking tracking refs
  builtin/submodule--helper: fix leaking refs on push-check
  submodule: fix leaking fetch task data
  upload-pack: fix leaking child process data on reachability checks
  builtin/push: fix leaking refspec query result
  send-pack: fix leaking common object IDs
  ...

1 files changed, 3 insertions, 0 deletions

diff --git a/t/README b/t/README
index 44c02d8129..8dcb778e26 100644
--- a/t/README
+++ b/t/README
@@ -386,6 +386,9 @@ GIT_TEST_PASSING_SANITIZE_LEAK=check when combined with "--immediate"
 will run to completion faster, and result in the same failing
 tests.
 
+GIT_TEST_PASSING_SANITIZE_LEAK=check-failing behaves the same as "check",
+but skips all tests which are already marked as leak-free.
+
 GIT_TEST_PROTOCOL_VERSION=<n>, when set, makes 'protocol.version'
 default to n.