Comment 5 for bug 1286162

FYI, I reported a bug that was just marked a dupe of this one that did not require upstart-app-launch but used aa-exec-click instead. I wonder if it has to do with the environment since aa-exec-click and upstart-app-launch will setup quite a bit of the environment. When launching my blabble app (available in the app store), the following environment is set up by aa-exec-click (I ommitted the env vars that aa-exec-click doesn't set):

APP_ID='com.ubuntu.developer.jdstrand.blabble_blabble_0.2.1'
LD_LIBRARY_PATH='/opt/click.ubuntu.com/.click/users/jamie/com.ubuntu.developer.jdstrand.blabble/lib/x86_64-linux-gnu'
PATH='/opt/click.ubuntu.com/.click/users/jamie/com.ubuntu.developer.jdstrand.blabble/lib/x86_64-linux-gnu/bin:/opt/click.ubuntu.com/.click/users/jamie/com.ubuntu.developer.jdstrand.blabble:/home/jamie/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/sbin:/usr/sbin:/usr/local/sbin'
QML2_IMPORT_PATH='/opt/click.ubuntu.com/.click/users/jamie/com.ubuntu.developer.jdstrand.blabble/lib/x86_64-linux-gnu'
TMPDIR='/run/user/1000/confined/com.ubuntu.developer.jdstrand.blabble'
UBUNTU_APPLICATION_ISOLATION='1'
XDG_CACHE_HOME=/home/jamie/.cache
XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg
XDG_CONFIG_HOME=/home/jamie/.config
XDG_DATA_DIRS='/opt/click.ubuntu.com/.click/users/jamie/com.ubuntu.developer.jdstrand.blabble:/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/'
XDG_DATA_HOME=/home/jamie/.local/share
XDG_RUNTIME_DIR=/run/user/1000
__GL_SHADER_DISK_CACHE_PATH='/home/jamie/.cache/com.ubuntu.developer.jdstrand.blabble'

To reproduce what I did:
1. grab some click app and install it on the desktop with 'sudo click install --user=$user <click package>
2. adjust /usr/bin/aa-exec-click to do 'set > /tmp/foo' just before the call to aa-exec
3. cd to the app directory (ie, what is in Path= in the ~/.local/share/applications/<app>.desktop
4. run aa-exec-click from this directory. Eg:
aa-exec-click -p com.ubuntu.developer.jdstrand.blabble_blabble_0.2.1 -- qmlscene blabble.qml

If it is indeed something in the environment, I suggest copying /usr/bin/aa-exec-click somewhere and modifying it for debugging/triaging.