Merge branch 'js/rebase-autosquash-double-fixup-fix'
"rebase -i" segfaulted when rearranging a sequence that has a
fix-up that applies another fix-up (which may or may not be a
fix-up of yet another step).
* js/rebase-autosquash-double-fixup-fix:
rebase --autosquash: fix a potential segfault
diff --git a/sequencer.c b/sequencer.c
index 9d1b3e7..fd7701c 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -5385,10 +5385,13 @@
todo_list->items[i].command =
starts_with(subject, "fixup!") ?
TODO_FIXUP : TODO_SQUASH;
- if (next[i2] < 0)
+ if (tail[i2] < 0) {
+ next[i] = next[i2];
next[i2] = i;
- else
+ } else {
+ next[i] = next[tail[i2]];
next[tail[i2]] = i;
+ }
tail[i2] = i;
} else if (!hashmap_get_from_hash(&subject2item,
strhash(subject), subject)) {
diff --git a/t/t3415-rebase-autosquash.sh b/t/t3415-rebase-autosquash.sh
index 093de90..7bab600 100755
--- a/t/t3415-rebase-autosquash.sh
+++ b/t/t3415-rebase-autosquash.sh
@@ -424,4 +424,20 @@
! grep first actual
'
+test_expect_success 'fixup a fixup' '
+ echo 0to-fixup >file0 &&
+ test_tick &&
+ git commit -m "to-fixup" file0 &&
+ test_tick &&
+ git commit --squash HEAD -m X --allow-empty &&
+ test_tick &&
+ git commit --squash HEAD^ -m Y --allow-empty &&
+ test_tick &&
+ git commit -m "squash! $(git rev-parse HEAD^)" -m Z --allow-empty &&
+ test_tick &&
+ git commit -m "squash! $(git rev-parse HEAD^^)" -m W --allow-empty &&
+ git rebase -ki --autosquash HEAD~5 &&
+ test XZWY = $(git show | tr -cd W-Z)
+'
+
test_done
