Bug#640872: Info received (Bug#640872: Acknowledgement (libc6: upgrade fails to mv /lib64.eglibc-new to /lib64; leaves system unusable))

[Austin Clements <amdragon+debian@MIT.EDU>]

I probably don't understand all of the nuances of that code, but one
potential fix is simply to pass a benign argument to mv.  Something like
    if ! $ldfile /bin/mv --version >/dev/null 2>/dev/null; then
        ...
Alternatively, it may be more robust for the script to simply create a
file to mv (for example, if it's possible to have a /bin/mv that
doesn't accept --version).