Re: [PATCH v6 0/8] push: update remote tags only with force

[Junio C Hamano <gitster@pobox.com>]

Max Horn <max@quendi.de> writes:

> But with next, I get this:
>
>
>  ! [rejected]        master -> master (already exists)
> error: failed to push some refs to '/Users/mhorn/Proje...o_orig'
> hint: Updates were rejected because the destination reference already exists
> hint: in the remote.
>
> This looks like a regression to me.

It is an outright bug.  The new helper function is_forwrdable() is
bogus to assume that both original and updated objects can be
locally inspected, but you do not necessarily have the original
locally.

 remote.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/remote.c b/remote.c
index aa6b719..4a253ef 100644
--- a/remote.c
+++ b/remote.c
@@ -1286,9 +1286,12 @@ static inline int is_forwardable(struct ref* ref)
 	if (!prefixcmp(ref->name, "refs/tags/"))
 		return 0;
 
-	/* old object must be a commit */
+	/*
+	 * old object must be a commit, but we may be forcing
+	 * without having it in the first place!
+	 */
 	o = parse_object(ref->old_sha1);
-	if (!o || o->type != OBJ_COMMIT)
+	if (o && o->type != OBJ_COMMIT)
 		return 0;
 
 	/* new object must be commit-ish */