Comment 1 for bug 1547983

Do you mean the cache on disk (/var/cache/apt/archives)? If so did you check that the package actually is there on your disk? I tried to reinstall vim-tiny which was in my cache and saw the following:

 $ sudo apt-get install --reinstall vim-tiny
[sudo] password for bdmurray:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-4.4.0-2 linux-headers-4.4.0-2-generic linux-image-4.4.0-2-generic linux-image-extra-4.4.0-2-generic linux-tools-4.4.0-2 linux-tools-4.4.0-2-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/428 kB of archives.
After this operation, 0 B of additional disk space will be used.
Sorry, your system lacks support for the snapshot feature
(Reading database ... 910537 files and directories currently installed.)
Preparing to unpack .../vim-tiny_2%3a7.4.963-1ubuntu4_amd64.deb ...
Unpacking vim-tiny (2:7.4.963-1ubuntu4) over (2:7.4.963-1ubuntu4) ...
Setting up vim-tiny (2:7.4.963-1ubuntu4) ...