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Description of problem:
Migration with non-existent xml does not report error messages although it returns non-zero value


Version-Release number of selected component (if applicable):
kernel-2.6.32-223.el6.x86_64
libvirt-0.9.9-1.el6.x86_64
qemu-kvm-0.12.1.2-2.213.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Prepare migration environment with shared nfs dir and start a guest

2. Do migration with
# virsh migrate kvm-rhel6u2-x86_64-new --live qemu+ssh://10.66.83.197/system --xml non-existent-xml
no error messages here and migration returns immediately 

3. Check return value
# echo $?
1
  
Actual results:
It does not report any error messages

Expected results:
It should report error messages

Additional info:

Patch for upstream:
https://www.redhat.com/archives/libvir-list/2012-January/msg00388.html

In POST:
commit c41a21de3abb6a080d87360ed7b246b070703b88
Author: Alex Jia <ajia>
Date:   Wed Jan 11 16:23:03 2012 +0800

    virsh: improve doMigrate function docs
    
    When running virsh migrate with --xml option and actual xml file doesn't
    exist, virsh hasn't output any error information, although return value
    is 1.
    
    * tools/virsh.c: Raising a appropriate error information when operation fails.
    
    * How to reproduce?
    % virsh migrate <domain> --live qemu+ssh://<target host>/system --xml non-existent.xml
    % echo $?
    
    * Fixed result:
    error: file 'non-existent.xml' doesn't exist
    
    Signed-off-by: Alex Jia <ajia>

Verify pass on 
libvirt-0.9.10-1.el6.x86_64
qemu-kvm-0.12.1.2-2.225.el6.x86_64
kernel-2.6.32-230.el6.x86_64

# virsh migrate --live tt qemu+ssh://10.66.85.218/system --xml none-exist.xml
error: file 'none-exist.xml' doesn't exist

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0748.html