Am 14.04.2017 um 22:32 schrieb g...@jeffhostetler.com:
diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 33a51c9..677e15a 100755
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -689,4 +689,17 @@ test_expect_success 'bogus head does not fallback to all 
heads' '
        ! 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 &&

sed on a binary file? Sooner or later we are going to run into portability issues.

+       mv .git/index.yyy .git/index &&
+       # Confirm that fsck detects invalid checksum
+       test_must_fail git fsck --cache &&

You should ensure that this failure is really because of an invalid checksum. The failure could also be due to an extra LF at the end that sed inserted, no?

+       # Confirm that status no longer complains about invalid checksum
+       git status
+'
+
 test_done

-- Hannes

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