buildbot failure in qemu-kvm on default_x86_64_out_of_tree

The Buildbot has detected a new failure of default_x86_64_out_of_tree on qemu-kvm. Full details are available at:
http://buildbot.b1-systems.de/qemu-kvm/builders/default_x86_64_out_of_tree/builds/137

Buildbot URL: http://buildbot.b1-systems.de/qemu-kvm/

Buildslave for this Build: b1_qemu_kvm_1

Build Reason:
Build Source Stamp: [branch next] HEAD
Blamelist: Avi Kivity <[email protected]>

BUILD FAILED: failed compile

sincerely,
-The Buildbot