[PATCH v2 0/2] fix data corruption in fast-import

[Dmitry Ivankov <divanorama@gmail.com>]

It turns out the bug is older than "M 040000.." command.
Managed to reproduce with just "C .." command from tags/v1.5.3-rc2~6^2
b6f3481b.. Teach fast-import to recursively copy files/directories (Jul 15 2007)

And even better, there is no need to add a explicit check for sha1 mismatch (we
may still want to have this, but it can go separately).

Basically the test does:
Fill two distinct directories old/a, old/b
Commit them 
(necessary to make trees have sha1 computed and thus become potential delta bases)
C old new
C old/a new/b
M ... new/b/new_file

new/b is stored as a delta against old/a, but with delta base pointing to old/b.
And so ls-tree new/b fails, fsck fails both with "failed to apply delta".

Dmitry Ivankov (2):
  fast-import: add a test for tree delta base corruption
  fast-import: prevent producing bad delta

 fast-import.c          |   35 ++++++++++++++++++++++++++++++-----
 t/t9300-fast-import.sh |   41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 5 deletions(-)

-- 
1.7.3.4