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Description of problem:
Upon taking to different session with the same user, gdm crashes

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
1.Setup a vnc based on xinetd with xdmcp. {https://access.redhat.com/node/2516}
2.Take access with any user.
3.Again take an access with same user

Actual results:
gdm crashes

Expected results:
GDM should not crash

Additional info:

I am having a similar problem on CentOS 7, which could be related. I have a Xvnc running with gdm and xdmcp, when the user locks the screen GDM crashes just after entering the password at the unlock screen.

I traced this back to this bug: https://bugzilla.gnome.org/show_bug.cgi?id=786656

*** Bug 1485388 has been marked as a duplicate of this bug. ***

Can see exactly the same as https://bugzilla.redhat.com/show_bug.cgi?id=1545659

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0770