diff options
| author | Phillip Wood <phillip.wood@dunelm.org.uk> | 2020-11-04 18:29:37 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2020-11-05 01:10:41 +0300 |
| commit | e100bea48102dca7e21359993085e89c7f154f9d (patch) | |
| tree | a21bd9a41d2c961a46298747a3bdb20a850e2888 /t/t3404-rebase-interactive.sh | |
| parent | b927c80531cca9b9107754186532e8cb00884008 (diff) | |
rebase -i: stop overwriting ORIG_HEAD buffer
After rebasing, ORIG_HEAD is supposed to point to the old HEAD of the
rebased branch. The code used find_unique_abbrev() to obtain the
object name of the old HEAD and wrote to both
.git/rebase-merge/orig-head (used by `rebase --abort` to go back to
the previous state) and to ORIG_HEAD. The buffer find_unique_abbrev()
gives back is volatile, unfortunately, and was overwritten after the
former file is written but before ORIG_FILE is written, leaving an
incorrect object name in it.
Avoid relying on the volatile buffer of find_unique_abbrev(), and
instead supply our own buffer to keep the object name.
I think that all of the users of head_hash should actually be using
opts->orig_head instead as passing a string rather than a struct
object_id around is a hang over from the scripted implementation. This
patch just fixes the immediate bug and adds a regression test based on
Caspar's reproduction example[1]. The users will be converted to use
struct object_id and head_hash removed in the next few commits.
[1] https://lore.kernel.org/git/CAFzd1+7PDg2PZgKw7U0kdepdYuoML9wSN4kofmB_-8NHrbbrHg@mail.gmail.com
Reported-by: Caspar Duregger <herr.kaste@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/t3404-rebase-interactive.sh')
| -rwxr-xr-x | t/t3404-rebase-interactive.sh | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh index 07a1617351..1e56696e4f 100755 --- a/t/t3404-rebase-interactive.sh +++ b/t/t3404-rebase-interactive.sh @@ -1797,6 +1797,17 @@ test_expect_success 'todo has correct onto hash' ' test_i18ngrep "^# Rebase ..* onto $onto" actual ' +test_expect_success 'ORIG_HEAD is updated correctly' ' + test_when_finished "git checkout master && git branch -D test-orig-head" && + git checkout -b test-orig-head A && + git commit --allow-empty -m A1 && + git commit --allow-empty -m A2 && + git commit --allow-empty -m A3 && + git commit --allow-empty -m A4 && + git rebase master && + test_cmp_rev ORIG_HEAD test-orig-head@{1} +' + # This must be the last test in this file test_expect_success '$EDITOR and friends are unchanged' ' test_editor_unchanged |