Comment 3 for bug 1771630

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Christian Ehrhardt  (paelzer) wrote : Re: package mysql-server-5.7 (not installed) failed to install/upgrade: installed mysql-server-5.7 package post-installation script subprocess returned error exit status 127

I've just dup'ed another bug onto this.
But I can't see yet how this would happen.

The file is of mysql-common:
$ dpkg -S /usr/share/mysql-common/configure-symlinks
mysql-common: /usr/share/mysql-common/configure-symlinks

And this is a dependency.
Depends: apparmor (>= 2.10), bsdutils, initscripts, lsb-base (>= 4.1+Debian11ubuntu7), mysql-client-5.7 (>= 5.7.17-0ubuntu0.16.04.1), mysql-common (>= 5.6.22-1~), mysql-server-core-5.7 (= 5.7.17-0ubuntu0.16.04.1), passwd, perl (>= 5.6), psmisc, debconf (>= 0.5) | debconf-2.0, init-system-helpers (>= 1.18~), libc6 (>= 2.14), libevent-core-2.0-5 (>= 2.0.10-stable), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2), zlib1g (>= 1:1.1.4)
Pre-Depends: adduser (>= 3.40), debconf, mysql-common (>= 5.5)

I thought that (unless you go through extra steps) they would be unpacked in dependency order and then should be available at the time needed - odd ...