+++ This bug was initially created as a clone of Bug #887106 +++

Created attachment 663314 [details]
Dedub info from virt-manager

Description of problem:
Virt-manager error:ValueError: list.remove(x): x not in list after create lxc guest

Version-Release number of selected component (if applicable):
libvirt-0.10.2-12.el6.x86_64
virt-manager-0.9.0-18.el6.x86_64
qemu-kvm-0.12.1.2-2.340.el6.x86_64
kernel:2.6.32-345.el6.x86_64

How reproducible:
90%

Steps to Reproduce:
1.Launch virt-manager,there is a local qemu/kvm connection.
# virt-manager --debug

2.Add a lxc connection from virt-manager,create a new lxc guest,choose container type:Application container,use other default configurations.

3.Destroy the new created lxc guest,and delete the guest.

4.Disconnect the lxc connection,delete the lxc connection.

5.From the local qemu/kvm connection,New a guest,there is error shows in GUI:Error:list.remove(x): x not in list
debug info:
(virt-manager:12473): libglade-WARNING **: unknown attribute `swapped' for <signal>.
/usr/share/virt-manager/virtManager/baseclass.py:124: Warning: gsignal.c:2387: instance `0x3987280' has no handler with id `1360'
  ret = GObject.disconnect(self, handle)
2012-12-13 19:45:09,115 (create:352): Error setting create wizard conn state.
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/create.py", line 350, in reset_state
    self.set_conn(activeconn, force_validate=True)
  File "/usr/share/virt-manager/virtManager/create.py", line 205, in set_conn
    self.remove_conn()
  File "/usr/share/virt-manager/virtManager/create.py", line 197, in remove_conn
    self.conn.disconnect(signal)
  File "/usr/share/virt-manager/virtManager/baseclass.py", line 125, in disconnect
    self._gobject_handles.remove(handle)
ValueError: list.remove(x): x not in list

Actual results:
As steps show.

Expected results:
No error shows.

Additional info: 
1.Detailed debug info attached.
2.When new a lxc guest,then destroy and delete the guest,there is error messages in debug info,details refer the debug info.
2012-12-13 19:44:54,458 (serialcon:150): Error receiving stream data
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/serialcon.py", line 148, in _event_on_stream
    got = self.stream.recv(1024 * 100)
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 4249, in recv
    if ret == None: raise libvirtError ('virStreamRecv() failed')
libvirtError: stream had unexpected termination
2012-12-13 19:44:54,461 (serialcon:209): Error finishing stream
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/serialcon.py", line 207, in close
    self.stream.finish()
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 4101, in finish
    if ret == -1: raise libvirtError ('virStreamFinish() failed')
libvirtError: stream had unexpected termination



The bug is reproduced on RHEL7, so clone the bug. 
Version-Release number of selected component (if applicable):
libvirt-1.0.3-1.el7.x86_64
virt-manager-0.9.4-4.el7
python-virtinst-0.600.3-2.el7
qemu-kvm-1.3.0-6.el7.x86_64
kernel-3.7.0-0.36.el7.x86_64