blockcommit --pivot does not succeed in conjunction with qemu 5.0.0

[Thomas Stein <himbeere@xxxxxxxxxxxx>]

Hello one and all.

Got a problem with libvirt 6.2.0 and qemu 5.0.0.

virsh blockcommit mymachine vda --active --verbose --pivot

works until it shows [100%] but it never actually pivots. It just sits 
there. Is this a known issue with 6.2.0 and i should
try 6.3.0? For now i switched back to qemu 4.2.0 and this seems to solve 
the issue too. Any hints?

Ahoi! t.