Comment 9 for bug 1765803

Here's my log requested in the duplicate:

Log ended: 2018-04-15 15:56:00 (ok this far)

Log started: 2018-04-20 16:51:35
(Reading database ... 95%
(Reading database ... 187309 files and directories currently installed.)
Preparing to unpack .../dpkg_1.19.0.5ubuntu2_amd64.deb ...
Unpacking dpkg (1.19.0.5ubuntu2) over (1.19.0.5ubuntu1) ...
Setting up dpkg (1.19.0.5ubuntu2) ...
dpkg-deb: error while loading shared libraries: libzstd.so.1: cannot open shared object file: No such file or directory
dpkg: error processing archive /var/cache/apt/archives/libc6_2.27-3ubuntu1_i386.deb (--unpack):
 dpkg-deb --control subprocess returned error exit status 127
Log ended: 2018-04-20 16:51:37