Additional note: If I manually select "Ubuntu 2D" and run /usr/lib/nux/unity_support_test in the Unity 2D session with -p, it correctly fails:
$ /usr/lib/nux/unity_support_test -p Error: no composite extension $ echo $? 1 $
But if I run it with no arguments, it succeeds:
$ /usr/lib/nux/unity_support_test $ echo $? 0 $
Additional note: If I manually select "Ubuntu 2D" and run /usr/lib/ nux/unity_ support_ test in the Unity 2D session with -p, it correctly fails:
$ /usr/lib/ nux/unity_ support_ test -p
Error: no composite extension
$ echo $?
1
$
But if I run it with no arguments, it succeeds:
$ /usr/lib/ nux/unity_ support_ test
$ echo $?
0
$