[Bug 1711254] [NEW] 16.04.3 deployments include non-existent directories in $PATH

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Noticed this while doing regression testing on 16.04.3, and a number of
customers have asked with concerns as well during their testing.

I don't know exactly when this started, but we just started noticing it
with 16.04.3 (4.10) but $PATH by default now includes several
directories that do not exist:


ubuntu at above-ox:~$ find $(echo "$PATH" | sed -e 's/:/ /g') -maxdepth 1 -type dfind: ‘/home/ubuntu/bin’: No such file or directory
find: ‘/home/ubuntu/.local/bin’: No such file or directory
/usr/local/sbin
/usr/local/bin
/usr/sbin
/usr/bin
/sbin
/bin
/usr/games
/usr/local/games
find: ‘/snap/bin’: No such file or directory

We noticed this because it was causing a resource job in the
certification suite to suddenly start failing (the failure was not
catastrophic, but it did appear to customers who were concerned.

I've verified this on both s390x and amd64 16.04.3 deployments via MAAS
2.2.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic s390x
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: s390x
Date: Wed Aug 16 18:59:34 2017
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en.US_UTF-8
 SHELL=/bin/bash
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: base-files (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug s390x xenial
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16.04.3 deployments include non-existent directories in $PATH
https://bugs.launchpad.net/bugs/1711254
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