With the en/merge-recursive-cleanup patches already having advanced to next, the problem I discovered when rebasing Git for Windows' branch thicket becomes quite relevant now: t3030.35 fails consistently in the MSVC build & test (this part of the Azure Pipeline will be upstreamed later).
The solution: use a stable sort. Note: this patch series is based on top of en/merge-recursive-cleanup. Changes since v1: * The function was renamed to git_stable_qsort(), as per Junio's suggestion. Johannes Schindelin (2): Move git_sort(), a stable sort, into into libgit.a diffcore_rename(): use a stable sort Makefile | 2 +- compat/mingw.c | 11 +++-------- diffcore-rename.c | 2 +- git-compat-util.h | 9 ++++++--- compat/qsort.c => stable-qsort.c | 6 +++--- 5 files changed, 14 insertions(+), 16 deletions(-) rename compat/qsort.c => stable-qsort.c (89%) base-commit: 4615a8cb5b3a8d4959c30338925b1fa3b948ae52 Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-352%2Fdscho%2Frename-needs-stable-sort-v2 Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-352/dscho/rename-needs-stable-sort-v2 Pull-Request: https://github.com/gitgitgadget/git/pull/352 Range-diff vs v1: 1: 1202809db7 < -: ---------- Move git_sort(), a stable sort, into into libgit.a -: ---------- > 1: 8a99008a64 Move git_sort(), a stable sort, into into libgit.a 2: a95cdf1e94 ! 2: 442140438a diffcore_rename(): use a stable sort @@ -16,7 +16,7 @@ `a~Temporary merge branch 2_0` to `a` during a recursive merge, unexpectedly resulting in a clean merge. - Let's use the stable sort provided by `git_sort()` to avoid this + Let's use the stable sort provided by `git_stable_qsort()` to avoid this inconsistency. Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de> @@ -29,7 +29,7 @@ /* cost matrix sorted by most to least similar pair */ - QSORT(mx, dst_cnt * NUM_CANDIDATE_PER_DST, score_compare); -+ QSORT_STABLE(mx, dst_cnt * NUM_CANDIDATE_PER_DST, score_compare); ++ STABLE_QSORT(mx, dst_cnt * NUM_CANDIDATE_PER_DST, score_compare); rename_count += find_renames(mx, dst_cnt, minimum_score, 0); if (detect_rename == DIFF_DETECT_COPY) -- gitgitgadget
