Description of problem:
This happened after installing tigervnc-1.2.80-0.23.20130314svn5065.el7.x86_64
on RHEL7 server with @desktop, launching `vncserver` under admin (ordinary user)
and connecting toi the (:1) session from within active GNOME session.

Note that I started the VNC server via SSH, using ssh root@host, then `su admin` (i.e. non-login) and finally `vncserver`.

This brought system into state when multiple gnome-shell processes were started, `top` showing that one of them eating up to 79% CPU.  This went on until I killed the VNC server (`vncserver -kill :1`). During the state, 3 crashes of gnome-session were reported (3 crashes early on---delaying the `vncserver -kill` did not result in more crashes).

Version-Release number of selected component:
gnome-shell-3.8.4-22.el7

Additional info:
reporter:       libreport-2.1.11
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: g_wakeup_new
executable:     /usr/bin/gnome-shell
kernel:         3.10.0-86.el7.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #2 g_wakeup_new at gwakeup.c:163
 #3 g_main_context_new at gmain.c:614
 #4 g_dbus_connection_send_message_with_reply_sync at gdbusconnection.c:2227
 #5 g_dbus_connection_call_sync_internal at gdbusconnection.c:5564
 #6 g_dbus_connection_call_sync at gdbusconnection.c:5790
 #7 ffi_call_unix64 at ../src/x86/unix64.S:76
 #8 ffi_call at ../src/x86/ffi64.c:522
 #9 gjs_invoke_c_function at gi/function.c:893
 #10 function_call at gi/function.c:1202
 #11 CallJSNative at jscntxtinlines.h:701