add tests for cloning corrupted repositories
We try not to let corruption pass unnoticed over fetches and clones. For the most part, this works, but there are some broken corner cases, including: 1. We do not detect missing objects over git-aware transports. This is a little hard to test, because the sending side will actually complain about the missing object. To fool it, we corrupt a repository such that we have a "misnamed" object: it claims to be sha1 X, but is really Y. This lets the sender blindly transmit it, but it is the receiver's responsibility to verify that what it got is sane (and it does not). 2. We do not detect missing or misnamed blobs during the checkout phase of clone. Signed-off-by: NJeff King <peff@peff.net> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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