fsck: detect null sha1 in tree entries
authorJeff King <peff@peff.net>
Sat, 28 Jul 2012 15:06:29 +0000 (11:06 -0400)
committerJunio C Hamano <gitster@pobox.com>
Sun, 29 Jul 2012 22:14:08 +0000 (15:14 -0700)
Short of somebody happening to beat the 1 in 2^160 odds of
actually generating content that hashes to the null sha1, we
should never see this value in a tree entry. So let's have
fsck warn if it it seen.

As in the previous commit, we test both blob and submodule
entries to future-proof the test suite against the
implementation depending on connectivity to notice the
error.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
No differences found