Description of problem:

(Reported by Jeff Peeler)

Take a regular ISO file, truncate it down to ~10 MB, and try
to extract it:

  $ guestfish -a truncated.iso -m /dev/sda1 tar-out / /tmp/iso-content.tar
  [...]
  error in chunked encoding

Also the appliance crashes.

The real error is a kernel error, something like:

  [  109.397757] attempt to access beyond end of device
  [  109.403722] vda: rw=0, want=580844, limit=16512

The real error is not communicated back to the user, and the appliance
crashes making further commands impossible.

Version-Release number of selected component (if applicable):

1.14.8, but likely to affect recent versions