runnig $ docker save 1234567890ab > /tmp/my-image.tar
fails with
Error response from daemon: file integrity checksum failed for "var/cache/apt/pkgcache.bin"
OS: Oracle Enterprise Linux 7.2
Docker: Docker version 1.9.1, build ab77bde/1.9.1
What could this be? It only happens on some (at least one) Docker image. No matter if the Image is used in a Container or not. THere are several images without this problem. It happens to the image even after removing the image (docker rmi) and rebuilding it from the Dockerfile. The same Dockerfile can be build and saved without problems on Ubuntu 16.04 or Oracle Linux 6.x

How can I find out what causes the problem?
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