ofs=`git show-index < ${pack}.idx | grep $1 | cut -f1 -d" "` &&
ofs=$(($ofs + $2)) &&
chmod +w ${pack}.pack &&
- dd of=${pack}.pack count=1 bs=1 conv=notrunc seek=$ofs &&
+ dd of=${pack}.pack bs=1 conv=notrunc seek=$ofs &&
test_must_fail git verify-pack ${pack}.pack
}