libguestfs-1.29.43-1.fc23 fails to build in F23 since upgrading kernel from 4.1.0-0.rc4.git0.1.fc23 to 4.1.0-0.rc4.git1.1.fc23. See <http://koschei.cloud.fedoraproject.org/package/libguestfs>.
Seems to be a libvirt failure: libguestfs: opening libvirt handle: URI = qemu:///session, auth = default+wrapper, flags = 0 libvirt: XML-RPC error : Failed to connect socket to '/builddir/.cache/libvirt/libvirt-sock': Connection refused libguestfs: trace: launch = -1 (error) could not connect to libvirt (URI = qemu:///session): Failed to connect socket to '/builddir/.cache/libvirt/libvirt-sock': Connection refused [code=38 domain=7] at /builddir/build/BUILD/libguestfs-1.29.43/resize/test-virt-resize.pl line 160. Full log: https://kojipkgs.fedoraproject.org/work/tasks/1696/9821696/build.log
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle. Changing version to '23'. (As we did not run this process for some time, it could affect also pre-Fedora 23 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23
Pretty sure this isn't an issue anymore