Re: [PATCH v2 0/3] Add GIT_TEST_MULTI_PACK_INDEX environment variable

> To increase coverage of the multi-pack-index feature, add a
> GIT_TEST_MULTI_PACK_INDEX environment variable similar to other GIT_TEST_*
> variables.
>
> After creating the environment variable and running the test suite with it
> enabled, I found a few bugs in the multi-pack-index implementation. These
> are handled by the first two patches.
>
> I have set up a CI build on Azure Pipelines [1] that runs the test suite
> with a few optional features enabled, including GIT_TEST_MULTI_PACK_INDEX
> and GIT_TEST_COMMIT_GRAPH. I'll use this to watch the features and ensure
> they work well with the rest of the ongoing work. Eventually, we can add
> these variables to the Travis CI scripts.
>
> [1] https://git.visualstudio.com/git/_build?definitionId=4
>
> Derrick Stolee (3):
>    midx: fix broken free() in close_midx()
>    midx: close multi-pack-index on repack
>    multi-pack-index: define GIT_TEST_MULTI_PACK_INDEX
>
>   builtin/repack.c            |  7 +++++--
>   midx.c                      | 26 ++++++++++++++++++++------
>   midx.h                      |  6 +++++-
>   t/README                    |  4 ++++
>   t/t5310-pack-bitmaps.sh     |  1 +
>   t/t5319-multi-pack-index.sh |  2 +-
>   t/t9300-fast-import.sh      |  2 +-
>   7 files changed, 37 insertions(+), 11 deletions(-)
>
>
> base-commit: 5a0cc8aca797dbd7d2be3b67458ff880ed45cddf