Description of problem: SPICE HTML5 access can crash a VM

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

RHEV 3.6


How reproducible:-

With the configuration below, accessing the VM console makes the VM to crash.
RHEV-H: 7.2 (20160105.2.el7ev)
VM Optimized for: Desktop
VM Console: SPICE HTML5

libvirt log extract:
main_channel_link: add main channel client
main_channel_handle_parsed: net test: latency 11.173000 ms, bitrate 89035736 bps (84.911095 Mbps)
((null):5258): Spice-ERROR **: reds.c:1485:reds_send_link_ack: assertion `link->link_mess->channel_type == SPICE_CHANNEL_MAIN' failed
2016-02-25 11:00:54.504+0000: shutting down

The following configurations does NOT make the VM to crash:
1.
RHEV-H: 7.2 (20160105.2.el7ev)
VM Optimized for: Server
VM Console: SPICE HTML5

2.
RHEV-H: 7.2 (20160105.2.el7ev)
VM Optimized for: Desktop
VM Console: Auto

3.
RHEV-H: 6.7 (20160104.0.el6ev)
VM Optimized for: Desktop
VM Console: SPICE HTML5


Steps to Reproduce:
1. Create any VM, optimized for desktop and take console from spice with HTML, on host 7.2

2.

3.

Actual results:-
VM crash if we take console access by using spice with html.


Expected results:-
VM should not crash.


Additional info: