Xiao Long Jiang <zxi...@linux.vnet.ibm.com> writes:

> This fixes a Qemu crash that introduced by commit ad73970
> ("qom: Wrap prop visit in visit_start_struct").
> Not all of the callers of user_creatable_add_type always pass qdict,
> so we should check qdict against NULL, but not raise an assertion.
> The problem can be easily triggered by adding an iothread with:
>   $ virsh iothreadadd <domain> <threadid>
> In which the <threadid> is newly defined. The result of the command
> will return an error and cause the running guest crash.
> Cc: Eric Blake <ebl...@redhat.com>
> Cc: Markus Armbruster <arm...@redhat.com>
> Signed-off-by: Xiao Long Jiang <zxi...@linux.vnet.ibm.com>
> Reviewed-by: Dong Jia Shi <bjsdj...@linux.vnet.ibm.com>

Marc-André already posted a simpler fix:
Subject: [PATCH] qmp: fix object-add assert() without props
Message-Id: <20160921194126.10223-1-marcandre.lur...@redhat.com>

Would you be willing to test it?  Review would of course also be


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