[PATCH v2 0/3] setup: add `clear_repository_format()`

This patch series addresses memory leaks related to `struct repository_format`. Compared to v1 [1], this v2 has dropped the first patch ("setup: drop return value from `read_repository_format()`") and added another patch 1/3 (which solves a different problem).

Patch 2/3 is unchanged. Patch 3/3 now calls `clear_...()` not only in the error paths, but in all paths, as suggested in the review of v1.

Thanks to Peff and brian for reviewing v1.

There's a minor textual conflict with ed/simplify-setup-git-dir. A merge of these two topics still passes the test suite (and these leaks remain plugged).

[1] https://public-inbox.org/git/20181218072528.3870492-1-martin.agren@gmail.com/#t

Martin Ågren (3):
  setup: free old value before setting `work_tree`
  setup: do not use invalid `repository_format`
  setup: add `clear_repository_format()`

 cache.h           | 12 ++++++++++++
 builtin/init-db.c |  3 ++-
 repository.c      |  3 ++-
 setup.c           | 33 ++++++++++++++++++++++++---------
 worktree.c        |  4 +++-
 5 files changed, 43 insertions(+), 12 deletions(-)