Description of problem:
Occurred shortly after logging in to gnome shell. I suspect the problem is due to below. I removed the minidlna package as I switched to using rygel via gnome media sharing. However removing the minidlna package did not clean up the systemd setup for minidlna. I have now manually disabled the minidlna.service. Hopefuly that should work around the problem but  it really appears to be a packaging error.

systemctl status minidlna.service
minidlna.service - MiniDLNA is a DLNA/UPnP-AV server software
   Loaded: loaded (/usr/lib/systemd/system/minidlna.service; enabled)
   Active: failed (Result: core-dump) since Sat 2014-09-27 13:47:25 NZST; 26min ago
  Process: 1112 ExecStart=/usr/sbin/minidlnad -S (code=dumped, signal=ILL)
 Main PID: 1112 (code=dumped, signal=ILL)
   CGroup: /system.slice/minidlna.service

Sep 27 13:47:25 e6540 systemd[1]: Started MiniDLNA is a DLNA/UPnP-AV server...e.
Sep 27 13:47:25 e6540 systemd[1]: minidlna.service: main process exited, co...LL
Sep 27 13:47:25 e6540 systemd[1]: Unit minidlna.service entered failed state.
Hint: Some lines were ellipsized, use -l to show in full.

Version-Release number of selected component:
systemd-208-22.fc20

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        (inidlnad) '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' ''
crash_function: _xbegin
environ:        
executable:     /usr/lib/systemd/systemd
kernel:         3.16.3-200.fc20.x86_64
runlevel:       unknown
type:           CCpp
uid:            0

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 _xbegin at ../nptl/sysdeps/unix/sysv/linux/x86/hle.h:53
 #1 __lll_lock_elision at ../nptl/sysdeps/unix/sysv/linux/x86/elision-lock.c:56
 #2 __pthread_mutex_lock at ../nptl/pthread_mutex_lock.c:91
 #3 _nss_files_getgrnam_r at nss_files/files-grp.c:32
 #4 __getgrnam_r at ../nss/getXXbyYY_r.c:266
 #5 getgrnam at ../nss/getXXbyYY.c:116
 #6 get_group_creds at ../src/shared/util.c:4405
 #7 enforce_groups at ../src/core/execute.c:588
 #8 exec_spawn at ../src/core/execute.c:1312
 #9 service_spawn at ../src/core/service.c:1865