Conjure-up: conjure-down app.env['PATH'] -- NoneType object is not subscriptable

[JimMcHale]

Report

Thank you for trying conjure-up! Before reporting a bug please make sure you've gone through this checklist:

• [ ] Is this problem already documented at https://docs.ubuntu.com/conjure-up/en/troubleshoot#common-spell-problems
• [ ] Is conjure-up running inside a virtual machine?
• [ ] Is this problem reproducible with sudo snap refresh conjure-up --edge?

Please provide the output of the following commands

which juju
/snap/bin/juju

juju version
2.3.3-xenial-amd64

which conjure-up
/snap/bin/conjure-up 
/snap/bin/conjure-down

conjure-up --version
conjure-up 2.5.3

which lxc
/snap/bin/lxc config show
/snap/bin/lxc version

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.3 LTS"

Please attach tarball of **~/.cache/conjure-up**:

tar cvzf conjure-up.tar.gz ~/.cache/conjure-up
conjure-up.tar.gz

## Sosreport

Please attach a sosreport:
[sosreport-jmchale-20180221112311.tar.gz](https://github.com/conjure-up/conjure-up/files/1744777/sosreport-jmchale-20180221112311.tar.gz)

sudo apt install sosreport
sosreport
```

The resulting output file can be attached to this issue.

What Spell was Selected?

none or kubernetes
both fail with the same error

What provider (aws, maas, localhost, etc)?

localhost

MAAS Users

Which version of MAAS?
n/a

Commands ran

conjure-down

conjure-down kubernetes

both fail with the same error

Please outline what commands were run to install and execute conjure-up:

Additional Information

conjure-down
Traceback (most recent call last):
File "/snap/conjure-up/967/bin/conjure-down", line 11, in
load_entry_point('conjure-up==2.5.3', 'console_scripts', 'conjure-down')()
File "/snap/conjure-up/967/lib/python3.6/site-packages/conjureup/destroy.py", line 73, in main
juju.set_bin_path()
File "/snap/conjure-up/967/lib/python3.6/site-packages/conjureup/juju.py", line 61, in set_bin_path
app.env['PATH'])
TypeError: 'NoneType' object is not subscriptable

conjure-down kubernetes
Traceback (most recent call last):
File "/snap/conjure-up/967/bin/conjure-down", line 11, in
load_entry_point('conjure-up==2.5.3', 'console_scripts', 'conjure-down')()
File "/snap/conjure-up/967/lib/python3.6/site-packages/conjureup/destroy.py", line 73, in main
juju.set_bin_path()
File "/snap/conjure-up/967/lib/python3.6/site-packages/conjureup/juju.py", line 61, in set_bin_path
app.env['PATH'])
TypeError: 'NoneType' object is not subscriptable

This is happening on a system running ubuntu 16.04.3 LTS and also in an azure vm running ubuntu 16.04.3 LTS

[kingttx]

Same with conjure-up version 2.5.6, Ubuntu 16.04.4, and OpenStack NovaLXD on localhost.

[kingttx]

Refreshed to --edge, still same error.

[kingttx]

Refreshed to --beta, still same error.