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-rw-r--r--builtin/merge.c10
-rwxr-xr-xt/t7600-merge.sh10
2 files changed, 15 insertions, 5 deletions
diff --git a/builtin/merge.c b/builtin/merge.c
index 101ffef..bf2f261 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1257,12 +1257,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
builtin_merge_options);
if (!head_commit) {
- struct commit *remote_head;
/*
* If the merged head is a valid one there is no reason
* to forbid "git merge" into a branch yet to be born.
* We do the same for "git pull".
*/
+ unsigned char *remote_head_sha1;
if (squash)
die(_("Squash commit into empty head not supported yet"));
if (fast_forward == FF_NO)
@@ -1270,13 +1270,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
"an empty head"));
remoteheads = collect_parents(head_commit, &head_subsumed,
argc, argv, NULL);
- remote_head = remoteheads->item;
- if (!remote_head)
+ if (!remoteheads)
die(_("%s - not something we can merge"), argv[0]);
if (remoteheads->next)
die(_("Can merge only exactly one commit into empty head"));
- read_empty(remote_head->object.oid.hash, 0);
- update_ref("initial pull", "HEAD", remote_head->object.oid.hash,
+ remote_head_sha1 = remoteheads->item->object.oid.hash;
+ read_empty(remote_head_sha1, 0);
+ update_ref("initial pull", "HEAD", remote_head_sha1,
NULL, 0, UPDATE_REFS_DIE_ON_ERR);
goto done;
}
diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh
index 302e238..9d7952f 100755
--- a/t/t7600-merge.sh
+++ b/t/t7600-merge.sh
@@ -725,4 +725,14 @@ test_expect_success 'merge detects mod-256 conflicts (resolve)' '
test_must_fail git merge -s resolve master
'
+test_expect_success 'merge nothing into void' '
+ git init void &&
+ (
+ cd void &&
+ git remote add up .. &&
+ git fetch up &&
+ test_must_fail git merge FETCH_HEAD
+ )
+'
+
test_done