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get_main_ref_store: BUG() when outside a repository

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If we don't have a repository, then we can't initialize the
ref store.  Prior to 64a741619d (refs: store the main ref
store inside the repository struct, 2018-04-11), we'd try to
access get_git_dir(), and outside a repository that would
trigger a BUG(). After that commit, though, we directly use
the_repository->git_dir; if it's NULL we'll just segfault.

Let's catch this case and restore the BUG() behavior.
Obviously we don't ever want to hit this code, but a BUG()
is a lot more helpful than a segfault if we do.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2018-05-18 15:25:53 -07:00 committed by Junio C Hamano
parent 7a1dc605af
commit 2dc417ab1f
1 changed files with 3 additions and 0 deletions
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3
refs.c
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@ -1654,6 +1654,9 @@ struct ref_store *get_main_ref_store(struct repository *r)
if (r->refs)
return r->refs;
if (!r->gitdir)
BUG("attempting to get main_ref_store outside of repository");
r->refs = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS);
return r->refs;
}