! grep $blob out
'
+test_expect_success 'detect corrupt index file in fsck' '
+ cp .git/index .git/index.backup &&
+ test_when_finished "mv .git/index.backup .git/index" &&
+ echo zzzzzzzz >zzzzzzzz &&
+ git add zzzzzzzz &&
+ sed -e "s/zzzzzzzz/yyyyyyyy/" .git/index >.git/index.yyy &&
+ mv .git/index.yyy .git/index &&
+ # Confirm that fsck detects invalid checksum
+ test_must_fail git fsck --cache &&
+ # Confirm that status no longer complains about invalid checksum
+ git status
+'
+
test_done