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Description of problem:
Adding set -u to a user's .profile does not allow a them to log in on the graphical console.

Version-Release number of selected component (if applicable):
dbus-1.10.24-7.el7.x86_64
xorg-x11-xinit-1.3.4-2.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Add 'set -u' in user's $HOME/.profile
2. Login as same user in runlevel 3
3. Execute startx.

Actual results:
/etc/X11/xinit/xinitrc-common: line <number: variable_name>: unbound variable

Expected results:
No errors.

Additional info:
Same issue is on multiple lines. Once workaround in form of
[ -z ${<variable_name>-} ] is applied, the issue is solved and I am able to log in the graphical session.

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.