Description of problem:

Fresh F23 install in VM with NFS home directories.  sddm-helper segfaults on login returning you directly to the login screen.

Core was generated by `/usr/libexec/sddm-helper --socket /tmp/sddm-authae2bc886-67e5-4ff1-b306-9998e4b'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  SDDM::UserSession::setupChildProcess (this=0x5632a15c0490)
    at /usr/src/debug/sddm-0.12.0/src/helper/UserSession.cpp:115
115             if (setgid(pw->pw_gid) != 0) {

(gdb) list
110                 }
111             }
112
113             const char  *username = qobject_cast<HelperApp*>(parent())->user().toLocal8Bit();
114             struct passwd *pw = getpwnam(username);
115             if (setgid(pw->pw_gid) != 0) {
116                 qCritical() << "setgid(" << pw->pw_gid << ") failed for user: " << username;
117                 exit(Auth::HELPER_OTHER_ERROR);
118             }
119             if (initgroups(pw->pw_name, pw->pw_gid) != 0) {
(gdb) print username
$1 = 0x5632a15ee9e8 "ion"

username should be "orion" so something is getting corrupted.

Version-Release number of selected component (if applicable):
sddm-0.12.0-2.fc23.x86_64

How reproducible:
Most of the time, but not 100%.