commit: check result of resolve_ref_unsafe

diff --git a/builtin/commit.c b/builtin/commit.c
index 1a0da71a43cfef8818b52a3d27131e340725cef2..b528290902da1153849e6cf4560488c553a1e38a 100644 (file)
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1483,6 +1483,8 @@ static void print_summary(const char *prefix, const struct object_id *oid,
        diff_setup_done(&rev.diffopt);
 
        head = resolve_ref_unsafe("HEAD", 0, junk_oid.hash, NULL);
+       if (!head)
+               die_errno(_("unable to resolve HEAD after creating commit"));
        if (!strcmp(head, "HEAD"))
                head = _("detached HEAD");
        else