Description:
When executing gnome-session --version program print version string as expected but exit value is 1. This is in my opinion problematic because in many cases exit value != 0 is interpreted as an error value.

Steps to reproduce:
1. Run gnome-session --version
2. To see exit value run: echo $? 

Expected result:
gnome-session --version should print out version string and give 0 as a exit value.

Actual result:
gnome-session --version prints out version string and gives 1 as a exit value.

Does this happen every time?
Yes it does. I have tested it with 3.6.2 but also git master seems to exit with value 1.

Other information:
I tried searching whether this is intentional or not but were unable to find such information. Then I did check gnome-shell sources and in a similar situation gnome-shell exits with value 0.