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-rw-r--r--builtin/merge-base.c3
-rwxr-xr-xt/t6010-merge-base.sh6
2 files changed, 9 insertions, 0 deletions
diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index c0d1822eb3..b572a37c26 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -173,6 +173,9 @@ static int handle_fork_point(int argc, const char **argv)
revs.initial = 1;
for_each_reflog_ent(refname, collect_one_reflog_ent, &revs);
+ if (!revs.nr && !get_sha1(refname, sha1))
+ add_one_commit(sha1, &revs);
+
for (i = 0; i < revs.nr; i++)
revs.commit[i]->object.flags &= ~TMP_MARK;
diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index e0c5f44cac..31db7b5f91 100755
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -260,6 +260,12 @@ test_expect_success 'using reflog to find the fork point' '
test_cmp expect3 actual
'
+test_expect_success '--fork-point works with empty reflog' '
+ git -c core.logallrefupdates=false branch no-reflog base &&
+ git merge-base --fork-point no-reflog derived &&
+ test_cmp expect3 actual
+'
+
test_expect_success 'merge-base --octopus --all for complex tree' '
# Best common ancestor for JE, JAA and JDD is JC
# JE