[opensuse-buildservice] python UnicodeDecodeError errors in _service files

What is causing this error? home:olh:xen-4.5/libvirt $ osc r -v openSUSE_Tumbleweed x86_64 broken: home:olh:xen-buildrequires/libvirt-4.1.0: service error: UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 44: ordinal not in range(128) I could not spot a byte '0xe2' in the sources. Olaf